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In the Dark @[email protected] · 2026-08-26 · 14:05 UTC
A “Full House” at the Open Journal of Astrophysics!

In my recent weekly updates of activity at the Open Journal of Astrophysics, the latest of which is here, I’ve remarked that we had built up quite a backlog of papers accepted but yet to be published. This is no doubt due to August being a holiday for many researchers. Well, we seem to be catching up rather rapidly. So far this week we have published eight new papers, and it’s only Wednesday!
The recent burst of activity has led to us establishing a first, a week in which we have published a full house of at least one paper in each of the six sections of astro-ph on the arXiv. As a reminder, these are they:
1. astro-ph.GA – Astrophysics of Galaxies. Phenomena pertaining to galaxies or the Milky Way. Star clusters, HII regions and planetary nebulae, the interstellar medium, atomic and molecular clouds, dust. Stellar populations. Galactic structure, formation, dynamics. Galactic nuclei, bulges, disks, halo. Active Galactic Nuclei, supermassive black holes, quasars. Gravitational lens systems. The Milky Way and its contents
2. astro-ph.CO – Cosmology and Nongalactic Astrophysics. Phenomenology of early universe, cosmic microwave background, cosmological parameters, primordial element abundances, extragalactic distance scale, large-scale structure of the universe. Groups, superclusters, voids, intergalactic medium. Particle astrophysics: dark energy, dark matter, baryogenesis, leptogenesis, inflationary models, reheating, monopoles, WIMPs, cosmic strings, primordial black holes, cosmological gravitational radiation
3. astro-ph.EP – Earth and Planetary Astrophysics. Interplanetary medium, planetary physics, planetary astrobiology, extrasolar planets, comets, asteroids, meteorites. Structure and formation of the solar system
4. astro-ph.HE – High Energy Astrophysical Phenomena. Cosmic ray production, acceleration, propagation, detection. Gamma ray astronomy and bursts, X-rays, charged particles, supernovae and other explosive phenomena, stellar remnants and accretion systems, jets, microquasars, neutron stars, pulsars, black holes
5. astro-ph.IM – Instrumentation and Methods for Astrophysics. Detector and telescope design, experiment proposals. Laboratory Astrophysics. Methods for data analysis, statistical methods. Software, database design
6. astro-ph.SR – Solar and Stellar Astrophysics. White dwarfs, brown dwarfs, cataclysmic variables. Star formation and protostellar systems, stellar astrobiology, binary and multiple systems of stars, stellar evolution and structure, coronas. Central stars of planetary nebulae. Helioseismology, solar neutrinos, production and detection of gravitational radiation from stellar systems.
As of yesterday we had published in five of the six categories and were only missing a paper (in Number 4 – High-Energy Astrophysical Phenomena). Today, right on cue, from the queue, came this paper to complete the set:
There’s still a couple of days to go and we have more papers in the pipeline so it looks like I’ll have a busy time on Saturday morning when I do the next update!
#arXiv #DiamondOpenAccess #HighEnergyAstrophysicalPhenomena #OpenJournalOfAstrophysics #TheOpenJournalOfAstrophysics
#arxiv #diamondopenaccess #highenergyastrophysicalphenomena #openjournalofastrophysics #theopenjournalofastrophysics
In the Dark @[email protected] · 2026-08-26 · 14:05 UTC
A “Full House” at the Open Journal of Astrophysics!

In my recent weekly updates of activity at the Open Journal of Astrophysics, the latest of which is here, I’ve remarked that we had built up quite a backlog of papers accepted but yet to be published. This is no doubt due to August being a holiday for many researchers. Well, we seem to be catching up rather rapidly. So far this week we have published eight new papers, and it’s only Wednesday!
The recent burst of activity has led to us establishing a first, a week in which we have published a full house of at least one paper in each of the six sections of astro-ph on the arXiv. As a reminder, these are they:
1. astro-ph.GA – Astrophysics of Galaxies. Phenomena pertaining to galaxies or the Milky Way. Star clusters, HII regions and planetary nebulae, the interstellar medium, atomic and molecular clouds, dust. Stellar populations. Galactic structure, formation, dynamics. Galactic nuclei, bulges, disks, halo. Active Galactic Nuclei, supermassive black holes, quasars. Gravitational lens systems. The Milky Way and its contents
2. astro-ph.CO – Cosmology and Nongalactic Astrophysics. Phenomenology of early universe, cosmic microwave background, cosmological parameters, primordial element abundances, extragalactic distance scale, large-scale structure of the universe. Groups, superclusters, voids, intergalactic medium. Particle astrophysics: dark energy, dark matter, baryogenesis, leptogenesis, inflationary models, reheating, monopoles, WIMPs, cosmic strings, primordial black holes, cosmological gravitational radiation
3. astro-ph.EP – Earth and Planetary Astrophysics. Interplanetary medium, planetary physics, planetary astrobiology, extrasolar planets, comets, asteroids, meteorites. Structure and formation of the solar system
4. astro-ph.HE – High Energy Astrophysical Phenomena. Cosmic ray production, acceleration, propagation, detection. Gamma ray astronomy and bursts, X-rays, charged particles, supernovae and other explosive phenomena, stellar remnants and accretion systems, jets, microquasars, neutron stars, pulsars, black holes
5. astro-ph.IM – Instrumentation and Methods for Astrophysics. Detector and telescope design, experiment proposals. Laboratory Astrophysics. Methods for data analysis, statistical methods. Software, database design
6. astro-ph.SR – Solar and Stellar Astrophysics. White dwarfs, brown dwarfs, cataclysmic variables. Star formation and protostellar systems, stellar astrobiology, binary and multiple systems of stars, stellar evolution and structure, coronas. Central stars of planetary nebulae. Helioseismology, solar neutrinos, production and detection of gravitational radiation from stellar systems.
As of yesterday we had published in five of the six categories and were only missing a paper (in Number 4 – High-Energy Astrophysical Phenomena). Today, right on cue, from the queue, came this paper to complete the set:
There’s still a couple of days to go and we have more papers in the pipeline so it looks like I’ll have a busy time on Saturday morning when I do the next update!
#arXiv #DiamondOpenAccess #HighEnergyAstrophysicalPhenomena #OpenJournalOfAstrophysics #TheOpenJournalOfAstrophysics
#arxiv #diamondopenaccess #highenergyastrophysicalphenomena #openjournalofastrophysics #theopenjournalofastrophysics
In the Dark @[email protected] · 2026-08-26 · 14:05 UTC
A “Full House” at the Open Journal of Astrophysics!

In my recent weekly updates of activity at the Open Journal of Astrophysics, the latest of which is here, I’ve remarked that we had built up quite a backlog of papers accepted but yet to be published. This is no doubt due to August being a holiday for many researchers. Well, we seem to be catching up rather rapidly. So far this week we have published eight new papers, and it’s only Wednesday!
The recent burst of activity has led to us establishing a first, a week in which we have published a full house of at least one paper in each of the six sections of astro-ph on the arXiv. As a reminder, these are they:
1. astro-ph.GA – Astrophysics of Galaxies. Phenomena pertaining to galaxies or the Milky Way. Star clusters, HII regions and planetary nebulae, the interstellar medium, atomic and molecular clouds, dust. Stellar populations. Galactic structure, formation, dynamics. Galactic nuclei, bulges, disks, halo. Active Galactic Nuclei, supermassive black holes, quasars. Gravitational lens systems. The Milky Way and its contents
2. astro-ph.CO – Cosmology and Nongalactic Astrophysics. Phenomenology of early universe, cosmic microwave background, cosmological parameters, primordial element abundances, extragalactic distance scale, large-scale structure of the universe. Groups, superclusters, voids, intergalactic medium. Particle astrophysics: dark energy, dark matter, baryogenesis, leptogenesis, inflationary models, reheating, monopoles, WIMPs, cosmic strings, primordial black holes, cosmological gravitational radiation
3. astro-ph.EP – Earth and Planetary Astrophysics. Interplanetary medium, planetary physics, planetary astrobiology, extrasolar planets, comets, asteroids, meteorites. Structure and formation of the solar system
4. astro-ph.HE – High Energy Astrophysical Phenomena. Cosmic ray production, acceleration, propagation, detection. Gamma ray astronomy and bursts, X-rays, charged particles, supernovae and other explosive phenomena, stellar remnants and accretion systems, jets, microquasars, neutron stars, pulsars, black holes
5. astro-ph.IM – Instrumentation and Methods for Astrophysics. Detector and telescope design, experiment proposals. Laboratory Astrophysics. Methods for data analysis, statistical methods. Software, database design
6. astro-ph.SR – Solar and Stellar Astrophysics. White dwarfs, brown dwarfs, cataclysmic variables. Star formation and protostellar systems, stellar astrobiology, binary and multiple systems of stars, stellar evolution and structure, coronas. Central stars of planetary nebulae. Helioseismology, solar neutrinos, production and detection of gravitational radiation from stellar systems.
As of yesterday we had published in five of the six categories and were only missing a paper (in Number 4 – High-Energy Astrophysical Phenomena). Today, right on cue, from the queue, came this paper to complete the set:
There’s still a couple of days to go and we have more papers in the pipeline so it looks like I’ll have a busy time on Saturday morning when I do the next update!
#arXiv #DiamondOpenAccess #HighEnergyAstrophysicalPhenomena #OpenJournalOfAstrophysics #TheOpenJournalOfAstrophysics
#arxiv #diamondopenaccess #highenergyastrophysicalphenomena #openjournalofastrophysics #theopenjournalofastrophysics
In the Dark @[email protected] · 2026-08-26 · 14:05 UTC
A “Full House” at the Open Journal of Astrophysics!

In my recent weekly updates of activity at the Open Journal of Astrophysics, the latest of which is here, I’ve remarked that we had built up quite a backlog of papers accepted but yet to be published. This is no doubt due to August being a holiday for many researchers. Well, we seem to be catching up rather rapidly. So far this week we have published eight new papers, and it’s only Wednesday!
The recent burst of activity has led to us establishing a first, a week in which we have published a full house of at least one paper in each of the six sections of astro-ph on the arXiv. As a reminder, these are they:
1. astro-ph.GA – Astrophysics of Galaxies. Phenomena pertaining to galaxies or the Milky Way. Star clusters, HII regions and planetary nebulae, the interstellar medium, atomic and molecular clouds, dust. Stellar populations. Galactic structure, formation, dynamics. Galactic nuclei, bulges, disks, halo. Active Galactic Nuclei, supermassive black holes, quasars. Gravitational lens systems. The Milky Way and its contents
2. astro-ph.CO – Cosmology and Nongalactic Astrophysics. Phenomenology of early universe, cosmic microwave background, cosmological parameters, primordial element abundances, extragalactic distance scale, large-scale structure of the universe. Groups, superclusters, voids, intergalactic medium. Particle astrophysics: dark energy, dark matter, baryogenesis, leptogenesis, inflationary models, reheating, monopoles, WIMPs, cosmic strings, primordial black holes, cosmological gravitational radiation
3. astro-ph.EP – Earth and Planetary Astrophysics. Interplanetary medium, planetary physics, planetary astrobiology, extrasolar planets, comets, asteroids, meteorites. Structure and formation of the solar system
4. astro-ph.HE – High Energy Astrophysical Phenomena. Cosmic ray production, acceleration, propagation, detection. Gamma ray astronomy and bursts, X-rays, charged particles, supernovae and other explosive phenomena, stellar remnants and accretion systems, jets, microquasars, neutron stars, pulsars, black holes
5. astro-ph.IM – Instrumentation and Methods for Astrophysics. Detector and telescope design, experiment proposals. Laboratory Astrophysics. Methods for data analysis, statistical methods. Software, database design
6. astro-ph.SR – Solar and Stellar Astrophysics. White dwarfs, brown dwarfs, cataclysmic variables. Star formation and protostellar systems, stellar astrobiology, binary and multiple systems of stars, stellar evolution and structure, coronas. Central stars of planetary nebulae. Helioseismology, solar neutrinos, production and detection of gravitational radiation from stellar systems.
As of yesterday we had published in five of the six categories and were only missing a paper (in Number 4 – High-Energy Astrophysical Phenomena). Today, right on cue, from the queue, came this paper to complete the set:
There’s still a couple of days to go and we have more papers in the pipeline so it looks like I’ll have a busy time on Saturday morning when I do the next update!
#arXiv #DiamondOpenAccess #HighEnergyAstrophysicalPhenomena #OpenJournalOfAstrophysics #TheOpenJournalOfAstrophysics
#theopenjournalofastrophysics #openjournalofastrophysics #highenergyastrophysicalphenomena #diamondopenaccess #arxiv
In the Dark @[email protected] · 2026-08-26 · 14:05 UTC
A “Full House” at the Open Journal of Astrophysics!

In my recent weekly updates of activity at the Open Journal of Astrophysics, the latest of which is here, I’ve remarked that we had built up quite a backlog of papers accepted but yet to be published. This is no doubt due to August being a holiday for many researchers. Well, we seem to be catching up rather rapidly. So far this week we have published eight new papers, and it’s only Wednesday!
The recent burst of activity has led to us establishing a first, a week in which we have published a full house of at least one paper in each of the six sections of astro-ph on the arXiv. As a reminder, these are they:
1. astro-ph.GA – Astrophysics of Galaxies. Phenomena pertaining to galaxies or the Milky Way. Star clusters, HII regions and planetary nebulae, the interstellar medium, atomic and molecular clouds, dust. Stellar populations. Galactic structure, formation, dynamics. Galactic nuclei, bulges, disks, halo. Active Galactic Nuclei, supermassive black holes, quasars. Gravitational lens systems. The Milky Way and its contents
2. astro-ph.CO – Cosmology and Nongalactic Astrophysics. Phenomenology of early universe, cosmic microwave background, cosmological parameters, primordial element abundances, extragalactic distance scale, large-scale structure of the universe. Groups, superclusters, voids, intergalactic medium. Particle astrophysics: dark energy, dark matter, baryogenesis, leptogenesis, inflationary models, reheating, monopoles, WIMPs, cosmic strings, primordial black holes, cosmological gravitational radiation
3. astro-ph.EP – Earth and Planetary Astrophysics. Interplanetary medium, planetary physics, planetary astrobiology, extrasolar planets, comets, asteroids, meteorites. Structure and formation of the solar system
4. astro-ph.HE – High Energy Astrophysical Phenomena. Cosmic ray production, acceleration, propagation, detection. Gamma ray astronomy and bursts, X-rays, charged particles, supernovae and other explosive phenomena, stellar remnants and accretion systems, jets, microquasars, neutron stars, pulsars, black holes
5. astro-ph.IM – Instrumentation and Methods for Astrophysics. Detector and telescope design, experiment proposals. Laboratory Astrophysics. Methods for data analysis, statistical methods. Software, database design
6. astro-ph.SR – Solar and Stellar Astrophysics. White dwarfs, brown dwarfs, cataclysmic variables. Star formation and protostellar systems, stellar astrobiology, binary and multiple systems of stars, stellar evolution and structure, coronas. Central stars of planetary nebulae. Helioseismology, solar neutrinos, production and detection of gravitational radiation from stellar systems.
As of yesterday we had published in five of the six categories and were only missing a paper (in Number 4 – High-Energy Astrophysical Phenomena). Today, right on cue, from the queue, came this paper to complete the set:
There’s still a couple of days to go and we have more papers in the pipeline so it looks like I’ll have a busy time on Saturday morning when I do the next update!
#arXiv #DiamondOpenAccess #HighEnergyAstrophysicalPhenomena #OpenJournalOfAstrophysics #TheOpenJournalOfAstrophysics
#arxiv #diamondopenaccess #highenergyastrophysicalphenomena #openjournalofastrophysics #theopenjournalofastrophysics
In the Dark @[email protected] · 2026-08-25 · 08:31 UTC

Our Two-Million-Dollar Journal!

It’s exactly a year since I pointed out that the Open Journal of Astrophysics had saved the astrophysics research community worldwide a sum in excess of a million dollars in publication costs.
The Article Processing Charge (APC) for publishing a paper in Monthly Notices of the Royal Astronomical Society (MNRAS) is now £2356. Converting that to dollars at current rates (£1=$1.36) gives about $3200 per paper.
As of today, 25th August 2026, the Open Journal of Astrophysics has published 632 articles. Using the dollar cost of an MNRAS APC as a benchmark – many journals charge more – this means that we have now saved the global astrophysics community over $2M (for a total outlay of around $15K).
Yes, we are still a small journal but the size of that figure should help you understand how much money is being wasted globally on publishing fees that could instead be spent on actual research.
It’s good to see that more and more researchers are seeing the light and switching to Diamond Open Access. Today we published the 184th article in Volume 9 (2026) of the Open Journal of Astrophysics. At the end of August we will be about two-thirds of the way through the year so I expect we will publish more than 270 articles this year. I also expect that less than a year from now we will have saved our third million dollars.
I’d like to take this opportunity to thank everyone involved in running this journal: the Editors, staff at Maynooth University Library who help us, the host of volunteer referees, and of course our authors. I’m confident that, together, we can change the publishing landscape in astrophysics, and put the power (and money) back in the hands of researchers instead of greedy publishers.
This is a slightly-edited version of a post I made yesterday, when we had published four fewer papers, for the Open Journal of Astrophysics blog.
#APC #ArticleProcessingCharges #DiamondOpenAccess #OpenJournalOfAstrophysics #TheOpenJournalOfAstrophysics

#apc #articleprocessingcharges #diamondopenaccess #openjournalofastrophysics #theopenjournalofastrophysics
In the Dark @[email protected] · 2026-08-25 · 08:31 UTC

Our Two-Million-Dollar Journal!

It’s exactly a year since I pointed out that the Open Journal of Astrophysics had saved the astrophysics research community worldwide a sum in excess of a million dollars in publication costs.
The Article Processing Charge (APC) for publishing a paper in Monthly Notices of the Royal Astronomical Society (MNRAS) is now £2356. Converting that to dollars at current rates (£1=$1.36) gives about $3200 per paper.
As of today, 25th August 2026, the Open Journal of Astrophysics has published 632 articles. Using the dollar cost of an MNRAS APC as a benchmark – many journals charge more – this means that we have now saved the global astrophysics community over $2M (for a total outlay of around $15K).
Yes, we are still a small journal but the size of that figure should help you understand how much money is being wasted globally on publishing fees that could instead be spent on actual research.
It’s good to see that more and more researchers are seeing the light and switching to Diamond Open Access. Today we published the 184th article in Volume 9 (2026) of the Open Journal of Astrophysics. At the end of August we will be about two-thirds of the way through the year so I expect we will publish more than 270 articles this year. I also expect that less than a year from now we will have saved our third million dollars.
I’d like to take this opportunity to thank everyone involved in running this journal: the Editors, staff at Maynooth University Library who help us, the host of volunteer referees, and of course our authors. I’m confident that, together, we can change the publishing landscape in astrophysics, and put the power (and money) back in the hands of researchers instead of greedy publishers.
This is a slightly-edited version of a post I made yesterday, when we had published four fewer papers, for the Open Journal of Astrophysics blog.
#APC #ArticleProcessingCharges #DiamondOpenAccess #OpenJournalOfAstrophysics #TheOpenJournalOfAstrophysics

#apc #articleprocessingcharges #diamondopenaccess #openjournalofastrophysics #theopenjournalofastrophysics
In the Dark @[email protected] · 2026-08-25 · 08:31 UTC

Our Two-Million-Dollar Journal!

It’s exactly a year since I pointed out that the Open Journal of Astrophysics had saved the astrophysics research community worldwide a sum in excess of a million dollars in publication costs.
The Article Processing Charge (APC) for publishing a paper in Monthly Notices of the Royal Astronomical Society (MNRAS) is now £2356. Converting that to dollars at current rates (£1=$1.36) gives about $3200 per paper.
As of today, 25th August 2026, the Open Journal of Astrophysics has published 632 articles. Using the dollar cost of an MNRAS APC as a benchmark – many journals charge more – this means that we have now saved the global astrophysics community over $2M (for a total outlay of around $15K).
Yes, we are still a small journal but the size of that figure should help you understand how much money is being wasted globally on publishing fees that could instead be spent on actual research.
It’s good to see that more and more researchers are seeing the light and switching to Diamond Open Access. Today we published the 184th article in Volume 9 (2026) of the Open Journal of Astrophysics. At the end of August we will be about two-thirds of the way through the year so I expect we will publish more than 270 articles this year. I also expect that less than a year from now we will have saved our third million dollars.
I’d like to take this opportunity to thank everyone involved in running this journal: the Editors, staff at Maynooth University Library who help us, the host of volunteer referees, and of course our authors. I’m confident that, together, we can change the publishing landscape in astrophysics, and put the power (and money) back in the hands of researchers instead of greedy publishers.
This is a slightly-edited version of a post I made yesterday, when we had published four fewer papers, for the Open Journal of Astrophysics blog.
#APC #ArticleProcessingCharges #DiamondOpenAccess #OpenJournalOfAstrophysics #TheOpenJournalOfAstrophysics

#apc #articleprocessingcharges #diamondopenaccess #openjournalofastrophysics #theopenjournalofastrophysics
In the Dark @[email protected] · 2026-08-25 · 08:31 UTC

Our Two-Million-Dollar Journal!

It’s exactly a year since I pointed out that the Open Journal of Astrophysics had saved the astrophysics research community worldwide a sum in excess of a million dollars in publication costs.
The Article Processing Charge (APC) for publishing a paper in Monthly Notices of the Royal Astronomical Society (MNRAS) is now £2356. Converting that to dollars at current rates (£1=$1.36) gives about $3200 per paper.
As of today, 25th August 2026, the Open Journal of Astrophysics has published 632 articles. Using the dollar cost of an MNRAS APC as a benchmark – many journals charge more – this means that we have now saved the global astrophysics community over $2M (for a total outlay of around $15K).
Yes, we are still a small journal but the size of that figure should help you understand how much money is being wasted globally on publishing fees that could instead be spent on actual research.
It’s good to see that more and more researchers are seeing the light and switching to Diamond Open Access. Today we published the 184th article in Volume 9 (2026) of the Open Journal of Astrophysics. At the end of August we will be about two-thirds of the way through the year so I expect we will publish more than 270 articles this year. I also expect that less than a year from now we will have saved our third million dollars.
I’d like to take this opportunity to thank everyone involved in running this journal: the Editors, staff at Maynooth University Library who help us, the host of volunteer referees, and of course our authors. I’m confident that, together, we can change the publishing landscape in astrophysics, and put the power (and money) back in the hands of researchers instead of greedy publishers.
This is a slightly-edited version of a post I made yesterday, when we had published four fewer papers, for the Open Journal of Astrophysics blog.
#APC #ArticleProcessingCharges #DiamondOpenAccess #OpenJournalOfAstrophysics #TheOpenJournalOfAstrophysics

#theopenjournalofastrophysics #openjournalofastrophysics #diamondopenaccess #articleprocessingcharges #apc
In the Dark @[email protected] · 2026-08-25 · 08:31 UTC

Our Two-Million-Dollar Journal!

It’s exactly a year since I pointed out that the Open Journal of Astrophysics had saved the astrophysics research community worldwide a sum in excess of a million dollars in publication costs.
The Article Processing Charge (APC) for publishing a paper in Monthly Notices of the Royal Astronomical Society (MNRAS) is now £2356. Converting that to dollars at current rates (£1=$1.36) gives about $3200 per paper.
As of today, 25th August 2026, the Open Journal of Astrophysics has published 632 articles. Using the dollar cost of an MNRAS APC as a benchmark – many journals charge more – this means that we have now saved the global astrophysics community over $2M (for a total outlay of around $15K).
Yes, we are still a small journal but the size of that figure should help you understand how much money is being wasted globally on publishing fees that could instead be spent on actual research.
It’s good to see that more and more researchers are seeing the light and switching to Diamond Open Access. Today we published the 184th article in Volume 9 (2026) of the Open Journal of Astrophysics. At the end of August we will be about two-thirds of the way through the year so I expect we will publish more than 270 articles this year. I also expect that less than a year from now we will have saved our third million dollars.
I’d like to take this opportunity to thank everyone involved in running this journal: the Editors, staff at Maynooth University Library who help us, the host of volunteer referees, and of course our authors. I’m confident that, together, we can change the publishing landscape in astrophysics, and put the power (and money) back in the hands of researchers instead of greedy publishers.
This is a slightly-edited version of a post I made yesterday, when we had published four fewer papers, for the Open Journal of Astrophysics blog.
#APC #ArticleProcessingCharges #DiamondOpenAccess #OpenJournalOfAstrophysics #TheOpenJournalOfAstrophysics

#apc #articleprocessingcharges #diamondopenaccess #openjournalofastrophysics #theopenjournalofastrophysics
In the Dark @[email protected] · 2026-08-02 · 11:29 UTC

News from arXiv…

I saw recently an announcement that arXiv – which recently became a standalone nonprofit organization – now hosts more than three million articles. That message took me to a post on the arXiv blog from which I learnt that said blog is on WordPress which makes it possible to include embedded links from this WordPress blog, i.e.:
https://blog.arxiv.org/2026/07/09/arxiv-now-hosts-over-3-million-articles/?page_id=1854
This in turn reminded me to answer a question that people sometimes ask about the Open Journal of Astrophysics, namely what would happen if arXiv went offline? Since OJAp is an arXiv-overlay journal this would appear to be fatal. We have been keeping duplicates of all the papers we publish, and associated metadata, in a local repository so that if arXiv went down we could reistate them fairly quickly. All we would need to do is alter the overlay to point to a different web address: there is no reason at all why the overlay idea can’t be adapted to other forms of repository.
Recently, however, arXiv decided to do a similar thing for all its articles. Here is a blog post about it:
https://blog.arxiv.org/2026/02/03/arxiv-future-proofs-access-to-research-with-third-party-digital-preservation/
I blogged about the first stage of this here.
Anyway, if you use arXiv at all – which will include most astrophysicists – then it would be a good idea to follow the arXiv blog as there is very important news on it, including information about alterations to the schedule of announcements.
#arXiv #arXivBlog #arXivMirrors #digitalPreservation #OpenAccess #OpenJournalOfAstrophysics #TheOpenJournalOfAstrophysics

#arxiv #arxivblog #arxivmirrors #digitalpreservation #openaccess #openjournalofastrophysics
In the Dark @[email protected] · 2026-08-02 · 11:29 UTC

News from arXiv…

I saw recently an announcement that arXiv – which recently became a standalone nonprofit organization – now hosts more than three million articles. That message took me to a post on the arXiv blog from which I learnt that said blog is on WordPress which makes it possible to include embedded links from this WordPress blog, i.e.:
https://blog.arxiv.org/2026/07/09/arxiv-now-hosts-over-3-million-articles/?page_id=1854
This in turn reminded me to answer a question that people sometimes ask about the Open Journal of Astrophysics, namely what would happen if arXiv went offline? Since OJAp is an arXiv-overlay journal this would appear to be fatal. We have been keeping duplicates of all the papers we publish, and associated metadata, in a local repository so that if arXiv went down we could reistate them fairly quickly. All we would need to do is alter the overlay to point to a different web address: there is no reason at all why the overlay idea can’t be adapted to other forms of repository.
Recently, however, arXiv decided to do a similar thing for all its articles. Here is a blog post about it:
https://blog.arxiv.org/2026/02/03/arxiv-future-proofs-access-to-research-with-third-party-digital-preservation/
I blogged about the first stage of this here.
Anyway, if you use arXiv at all – which will include most astrophysicists – then it would be a good idea to follow the arXiv blog as there is very important news on it, including information about alterations to the schedule of announcements.
#arXiv #arXivBlog #arXivMirrors #digitalPreservation #OpenAccess #OpenJournalOfAstrophysics #TheOpenJournalOfAstrophysics

#arxiv #arxivblog #arxivmirrors #digitalpreservation #openaccess #openjournalofastrophysics
In the Dark @[email protected] · 2026-08-02 · 11:29 UTC

News from arXiv…

I saw recently an announcement that arXiv – which recently became a standalone nonprofit organization – now hosts more than three million articles. That message took me to a post on the arXiv blog from which I learnt that said blog is on WordPress which makes it possible to include embedded links from this WordPress blog, i.e.:
https://blog.arxiv.org/2026/07/09/arxiv-now-hosts-over-3-million-articles/?page_id=1854
This in turn reminded me to answer a question that people sometimes ask about the Open Journal of Astrophysics, namely what would happen if arXiv went offline? Since OJAp is an arXiv-overlay journal this would appear to be fatal. We have been keeping duplicates of all the papers we publish, and associated metadata, in a local repository so that if arXiv went down we could reistate them fairly quickly. All we would need to do is alter the overlay to point to a different web address: there is no reason at all why the overlay idea can’t be adapted to other forms of repository.
Recently, however, arXiv decided to do a similar thing for all its articles. Here is a blog post about it:
https://blog.arxiv.org/2026/02/03/arxiv-future-proofs-access-to-research-with-third-party-digital-preservation/
I blogged about the first stage of this here.
Anyway, if you use arXiv at all – which will include most astrophysicists – then it would be a good idea to follow the arXiv blog as there is very important news on it, including information about alterations to the schedule of announcements.
#arXiv #arXivBlog #arXivMirrors #digitalPreservation #OpenAccess #OpenJournalOfAstrophysics #TheOpenJournalOfAstrophysics

#arxiv #arxivblog #arxivmirrors #digitalpreservation #openaccess #openjournalofastrophysics
In the Dark @[email protected] · 2026-08-02 · 11:29 UTC

News from arXiv…

I saw recently an announcement that arXiv – which recently became a standalone nonprofit organization – now hosts more than three million articles. That message took me to a post on the arXiv blog from which I learnt that said blog is on WordPress which makes it possible to include embedded links from this WordPress blog, i.e.:
https://blog.arxiv.org/2026/07/09/arxiv-now-hosts-over-3-million-articles/?page_id=1854
This in turn reminded me to answer a question that people sometimes ask about the Open Journal of Astrophysics, namely what would happen if arXiv went offline? Since OJAp is an arXiv-overlay journal this would appear to be fatal. We have been keeping duplicates of all the papers we publish, and associated metadata, in a local repository so that if arXiv went down we could reistate them fairly quickly. All we would need to do is alter the overlay to point to a different web address: there is no reason at all why the overlay idea can’t be adapted to other forms of repository.
Recently, however, arXiv decided to do a similar thing for all its articles. Here is a blog post about it:
https://blog.arxiv.org/2026/02/03/arxiv-future-proofs-access-to-research-with-third-party-digital-preservation/
I blogged about the first stage of this here.
Anyway, if you use arXiv at all – which will include most astrophysicists – then it would be a good idea to follow the arXiv blog as there is very important news on it, including information about alterations to the schedule of announcements.
#arXiv #arXivBlog #arXivMirrors #digitalPreservation #OpenAccess #OpenJournalOfAstrophysics #TheOpenJournalOfAstrophysics

#theopenjournalofastrophysics #openjournalofastrophysics #openaccess #digitalpreservation #arxivmirrors #arxivblog
In the Dark @[email protected] · 2026-07-21 · 11:38 UTC

A Ban on Publication Fees?

Yesterday I was going through the “onboarding” process via Zoom with two new Editors at the Open Journal of Astrophysics (OJAp) when one of them mentioned a recent policy decision at the USA which means we’ll probably get even more papers submitted from there. I wasn’t aware of the decision, but there’s an article in the Times Higher about it here.
In a nutshell:
Under proposed rule changes published by the Office of Management and Budget, all journal publication costs – “including page charges, article processing charges (APCs), or similar fees such as open access fees for professional journal publications and other peer-reviewed publications” – will become “unallowable under federal awards”.
It is important to stress that at this stage the change is proposed rather than actual and it remains to be seen whether it will stand. I think it should because publication fees, article processing charges or whatever you call them are a complete waste of money.
The Times Higher article frames this as “Trump’s ban on paying open access fees”. I was worried to be finding myself in agreement with Donald Trump on anything, but I very much doubt that Trump himself knows anything about scientific publishing or has had much of a hand in this decision. It seems to me to be eminently sensible to ensure that funds meant to be directed at research are not frittered away on page charges. If I were involved in running a research institution I would make it a disciplinary offence to spend money on publication fees.
Of course the academic publishing industry is upset about the proposal claiming that scientific publishing is “high cost”, which it is but only because the publishers rake in huge profits. The way forward, as I have argued many times (e.g. here), is Diamond Open Access, a exemplified by OJAp. The marginal cost per paper article published for OJAp is just $10 and we have at least as much impact as the other leading journals in astrophysics.
I have been surprised how many researchers from the USA are already using OJAp, including many from top institutions such as Harvard, Caltech, Princeton and Chicago. The surprise is basically that authors from the USA have for many years been used to paying page charges for publishing in the Astrophysical Journal and others from the AAS stable. This was the case even before digital journals came on the scene and well before the Open Access movement. I suppose American authors put up with page charges because they felt they had to, but that is no longer the case.
Will we get even more submissions from the USA as a result of this policy change? We’ll just have to wait and see…
P.S. This morning I published the 600th paper at the Open Journal of Astrophysics.
#ArticleProcessingCharges #DiamondOpenAccess #OpenJournalOfAstrophysics #pageCharges #TheAcademicPublishingRacket #TheOpenJournalOfAstrophysics #TimesHigher

#articleprocessingcharges #diamondopenaccess #openjournalofastrophysics #pagecharges #theacademicpublishingracket #theopenjournalofastrophysics
In the Dark @[email protected] · 2026-07-21 · 11:38 UTC

A Ban on Publication Fees?

Yesterday I was going through the “onboarding” process via Zoom with two new Editors at the Open Journal of Astrophysics (OJAp) when one of them mentioned a recent policy decision at the USA which means we’ll probably get even more papers submitted from there. I wasn’t aware of the decision, but there’s an article in the Times Higher about it here.
In a nutshell:
Under proposed rule changes published by the Office of Management and Budget, all journal publication costs – “including page charges, article processing charges (APCs), or similar fees such as open access fees for professional journal publications and other peer-reviewed publications” – will become “unallowable under federal awards”.
It is important to stress that at this stage the change is proposed rather than actual and it remains to be seen whether it will stand. I think it should because publication fees, article processing charges or whatever you call them are a complete waste of money.
The Times Higher article frames this as “Trump’s ban on paying open access fees”. I was worried to be finding myself in agreement with Donald Trump on anything, but I very much doubt that Trump himself knows anything about scientific publishing or has had much of a hand in this decision. It seems to me to be eminently sensible to ensure that funds meant to be directed at research are not frittered away on page charges. If I were involved in running a research institution I would make it a disciplinary offence to spend money on publication fees.
Of course the academic publishing industry is upset about the proposal claiming that scientific publishing is “high cost”, which it is but only because the publishers rake in huge profits. The way forward, as I have argued many times (e.g. here), is Diamond Open Access, a exemplified by OJAp. The marginal cost per paper article published for OJAp is just $10 and we have at least as much impact as the other leading journals in astrophysics.
I have been surprised how many researchers from the USA are already using OJAp, including many from top institutions such as Harvard, Caltech, Princeton and Chicago. The surprise is basically that authors from the USA have for many years been used to paying page charges for publishing in the Astrophysical Journal and others from the AAS stable. This was the case even before digital journals came on the scene and well before the Open Access movement. I suppose American authors put up with page charges because they felt they had to, but that is no longer the case.
Will we get even more submissions from the USA as a result of this policy change? We’ll just have to wait and see…
P.S. This morning I published the 600th paper at the Open Journal of Astrophysics.
#ArticleProcessingCharges #DiamondOpenAccess #OpenJournalOfAstrophysics #pageCharges #TheAcademicPublishingRacket #TheOpenJournalOfAstrophysics #TimesHigher

#articleprocessingcharges #diamondopenaccess #openjournalofastrophysics #pagecharges #theacademicpublishingracket #theopenjournalofastrophysics
In the Dark @[email protected] · 2026-07-21 · 11:38 UTC

A Ban on Publication Fees?

Yesterday I was going through the “onboarding” process via Zoom with two new Editors at the Open Journal of Astrophysics (OJAp) when one of them mentioned a recent policy decision at the USA which means we’ll probably get even more papers submitted from there. I wasn’t aware of the decision, but there’s an article in the Times Higher about it here.
In a nutshell:
Under proposed rule changes published by the Office of Management and Budget, all journal publication costs – “including page charges, article processing charges (APCs), or similar fees such as open access fees for professional journal publications and other peer-reviewed publications” – will become “unallowable under federal awards”.
It is important to stress that at this stage the change is proposed rather than actual and it remains to be seen whether it will stand. I think it should because publication fees, article processing charges or whatever you call them are a complete waste of money.
The Times Higher article frames this as “Trump’s ban on paying open access fees”. I was worried to be finding myself in agreement with Donald Trump on anything, but I very much doubt that Trump himself knows anything about scientific publishing or has had much of a hand in this decision. It seems to me to be eminently sensible to ensure that funds meant to be directed at research are not frittered away on page charges. If I were involved in running a research institution I would make it a disciplinary offence to spend money on publication fees.
Of course the academic publishing industry is upset about the proposal claiming that scientific publishing is “high cost”, which it is but only because the publishers rake in huge profits. The way forward, as I have argued many times (e.g. here), is Diamond Open Access, a exemplified by OJAp. The marginal cost per paper article published for OJAp is just $10 and we have at least as much impact as the other leading journals in astrophysics.
I have been surprised how many researchers from the USA are already using OJAp, including many from top institutions such as Harvard, Caltech, Princeton and Chicago. The surprise is basically that authors from the USA have for many years been used to paying page charges for publishing in the Astrophysical Journal and others from the AAS stable. This was the case even before digital journals came on the scene and well before the Open Access movement. I suppose American authors put up with page charges because they felt they had to, but that is no longer the case.
Will we get even more submissions from the USA as a result of this policy change? We’ll just have to wait and see…
P.S. This morning I published the 600th paper at the Open Journal of Astrophysics.
#ArticleProcessingCharges #DiamondOpenAccess #OpenJournalOfAstrophysics #pageCharges #TheAcademicPublishingRacket #TheOpenJournalOfAstrophysics #TimesHigher

#articleprocessingcharges #diamondopenaccess #openjournalofastrophysics #pagecharges #theacademicpublishingracket #theopenjournalofastrophysics
In the Dark @[email protected] · 2026-07-21 · 11:38 UTC

A Ban on Publication Fees?

Yesterday I was going through the “onboarding” process via Zoom with two new Editors at the Open Journal of Astrophysics (OJAp) when one of them mentioned a recent policy decision at the USA which means we’ll probably get even more papers submitted from there. I wasn’t aware of the decision, but there’s an article in the Times Higher about it here.
In a nutshell:
Under proposed rule changes published by the Office of Management and Budget, all journal publication costs – “including page charges, article processing charges (APCs), or similar fees such as open access fees for professional journal publications and other peer-reviewed publications” – will become “unallowable under federal awards”.
It is important to stress that at this stage the change is proposed rather than actual and it remains to be seen whether it will stand. I think it should because publication fees, article processing charges or whatever you call them are a complete waste of money.
The Times Higher article frames this as “Trump’s ban on paying open access fees”. I was worried to be finding myself in agreement with Donald Trump on anything, but I very much doubt that Trump himself knows anything about scientific publishing or has had much of a hand in this decision. It seems to me to be eminently sensible to ensure that funds meant to be directed at research are not frittered away on page charges. If I were involved in running a research institution I would make it a disciplinary offence to spend money on publication fees.
Of course the academic publishing industry is upset about the proposal claiming that scientific publishing is “high cost”, which it is but only because the publishers rake in huge profits. The way forward, as I have argued many times (e.g. here), is Diamond Open Access, a exemplified by OJAp. The marginal cost per paper article published for OJAp is just $10 and we have at least as much impact as the other leading journals in astrophysics.
I have been surprised how many researchers from the USA are already using OJAp, including many from top institutions such as Harvard, Caltech, Princeton and Chicago. The surprise is basically that authors from the USA have for many years been used to paying page charges for publishing in the Astrophysical Journal and others from the AAS stable. This was the case even before digital journals came on the scene and well before the Open Access movement. I suppose American authors put up with page charges because they felt they had to, but that is no longer the case.
Will we get even more submissions from the USA as a result of this policy change? We’ll just have to wait and see…
P.S. This morning I published the 600th paper at the Open Journal of Astrophysics.
#ArticleProcessingCharges #DiamondOpenAccess #OpenJournalOfAstrophysics #pageCharges #TheAcademicPublishingRacket #TheOpenJournalOfAstrophysics #TimesHigher

#timeshigher #theopenjournalofastrophysics #theacademicpublishingracket #pagecharges #openjournalofastrophysics #diamondopenaccess
In the Dark @[email protected] · 2026-05-11 · 09:01 UTC

Editorial Opportunity at the Journal of Open Source Software

The Journal of Open Source Software – known to its friends as JOSS – is is a developer friendly, diamond open access journal for research software packages which has been running since 2016 and is enormously successful, publishing Open Source software across many fields of science. Its UR, joss.theoj.org, is a giveaway that it is a stablemate of astro.theoj.org, aka the Open Journal of Astrophysics.
The driving force behind JOSS, responsible for getting it off the ground at the very beginning, is Arfon Smith whom I’ve known since Nottingham days and it iis fair to say that without his considerable help, OJAp would never have started. Both journals started off as speculative ventures, and OJAp has taken a considerable time to establish itself, but JOSS took off very quickly indeed and has now published over 3,500 papers. There are numerous differences between the two journals but, like OJAp, all publications in JOSS are free to authors and readers.
Arfon has held the role of Editor-in-Chief at JOSS since 2016 but in a recent blog post he explains that he is stepping down from his role as Editor-in-Chief, although he will remain at JOSS. The call for a replacement is here. It’s an opportunity that will appeal to anyone interested in open-source research software and open-access publishing so if that’s you then please consider applying. It will be a substantial investment of time, probably about a day a week. I quote:
Candidates should have the capacity to commit the time this role requires. For those in institutional positions, we ask for a brief letter or statement from your employer or supervisor confirming support for this commitment. Independent researchers, consultants, or others without a traditional institutional affiliation should include a brief statement describing how they plan to allocate the time.
P.S. Today OJAp published its 100th paper of 2026 so far…
P.P.S. I’ll be stepping down as Editor-in-Chief at OJAp in a couple of years, when I retire, and we’ll be doing a similar search nearer the date.
#ArfonSmith #DiamondOpenAccessPublishing #JOSS #JournalOfOpenSourceSoftware #OJAp #OpenJournalOfAstrophysics #openSourceSoftware #TheOpenJournalOfAstrophysics

#arfonsmith #diamondopenaccesspublishing #joss #journalofopensourcesoftware #ojap #openjournalofastrophysics
In the Dark @[email protected] · 2026-05-11 · 09:01 UTC

Editorial Opportunity at the Journal of Open Source Software

The Journal of Open Source Software – known to its friends as JOSS – is is a developer friendly, diamond open access journal for research software packages which has been running since 2016 and is enormously successful, publishing Open Source software across many fields of science. Its UR, joss.theoj.org, is a giveaway that it is a stablemate of astro.theoj.org, aka the Open Journal of Astrophysics.
The driving force behind JOSS, responsible for getting it off the ground at the very beginning, is Arfon Smith whom I’ve known since Nottingham days and it iis fair to say that without his considerable help, OJAp would never have started. Both journals started off as speculative ventures, and OJAp has taken a considerable time to establish itself, but JOSS took off very quickly indeed and has now published over 3,500 papers. There are numerous differences between the two journals but, like OJAp, all publications in JOSS are free to authors and readers.
Arfon has held the role of Editor-in-Chief at JOSS since 2016 but in a recent blog post he explains that he is stepping down from his role as Editor-in-Chief, although he will remain at JOSS. The call for a replacement is here. It’s an opportunity that will appeal to anyone interested in open-source research software and open-access publishing so if that’s you then please consider applying. It will be a substantial investment of time, probably about a day a week. I quote:
Candidates should have the capacity to commit the time this role requires. For those in institutional positions, we ask for a brief letter or statement from your employer or supervisor confirming support for this commitment. Independent researchers, consultants, or others without a traditional institutional affiliation should include a brief statement describing how they plan to allocate the time.
P.S. Today OJAp published its 100th paper of 2026 so far…
P.P.S. I’ll be stepping down as Editor-in-Chief at OJAp in a couple of years, when I retire, and we’ll be doing a similar search nearer the date.
#ArfonSmith #DiamondOpenAccessPublishing #JOSS #JournalOfOpenSourceSoftware #OJAp #OpenJournalOfAstrophysics #openSourceSoftware #TheOpenJournalOfAstrophysics

#arfonsmith #diamondopenaccesspublishing #joss #journalofopensourcesoftware #ojap #openjournalofastrophysics
In the Dark @[email protected] · 2026-05-11 · 09:01 UTC

Editorial Opportunity at the Journal of Open Source Software

The Journal of Open Source Software – known to its friends as JOSS – is is a developer friendly, diamond open access journal for research software packages which has been running since 2016 and is enormously successful, publishing Open Source software across many fields of science. Its UR, joss.theoj.org, is a giveaway that it is a stablemate of astro.theoj.org, aka the Open Journal of Astrophysics.
The driving force behind JOSS, responsible for getting it off the ground at the very beginning, is Arfon Smith whom I’ve known since Nottingham days and it iis fair to say that without his considerable help, OJAp would never have started. Both journals started off as speculative ventures, and OJAp has taken a considerable time to establish itself, but JOSS took off very quickly indeed and has now published over 3,500 papers. There are numerous differences between the two journals but, like OJAp, all publications in JOSS are free to authors and readers.
Arfon has held the role of Editor-in-Chief at JOSS since 2016 but in a recent blog post he explains that he is stepping down from his role as Editor-in-Chief, although he will remain at JOSS. The call for a replacement is here. It’s an opportunity that will appeal to anyone interested in open-source research software and open-access publishing so if that’s you then please consider applying. It will be a substantial investment of time, probably about a day a week. I quote:
Candidates should have the capacity to commit the time this role requires. For those in institutional positions, we ask for a brief letter or statement from your employer or supervisor confirming support for this commitment. Independent researchers, consultants, or others without a traditional institutional affiliation should include a brief statement describing how they plan to allocate the time.
P.S. Today OJAp published its 100th paper of 2026 so far…
P.P.S. I’ll be stepping down as Editor-in-Chief at OJAp in a couple of years, when I retire, and we’ll be doing a similar search nearer the date.
#ArfonSmith #DiamondOpenAccessPublishing #JOSS #JournalOfOpenSourceSoftware #OJAp #OpenJournalOfAstrophysics #openSourceSoftware #TheOpenJournalOfAstrophysics

#arfonsmith #diamondopenaccesspublishing #joss #journalofopensourcesoftware #ojap #openjournalofastrophysics
In the Dark @[email protected] · 2026-05-11 · 09:01 UTC

Editorial Opportunity at the Journal of Open Source Software

The Journal of Open Source Software – known to its friends as JOSS – is is a developer friendly, diamond open access journal for research software packages which has been running since 2016 and is enormously successful, publishing Open Source software across many fields of science. Its UR, joss.theoj.org, is a giveaway that it is a stablemate of astro.theoj.org, aka the Open Journal of Astrophysics.
The driving force behind JOSS, responsible for getting it off the ground at the very beginning, is Arfon Smith whom I’ve known since Nottingham days and it iis fair to say that without his considerable help, OJAp would never have started. Both journals started off as speculative ventures, and OJAp has taken a considerable time to establish itself, but JOSS took off very quickly indeed and has now published over 3,500 papers. There are numerous differences between the two journals but, like OJAp, all publications in JOSS are free to authors and readers.
Arfon has held the role of Editor-in-Chief at JOSS since 2016 but in a recent blog post he explains that he is stepping down from his role as Editor-in-Chief, although he will remain at JOSS. The call for a replacement is here. It’s an opportunity that will appeal to anyone interested in open-source research software and open-access publishing so if that’s you then please consider applying. It will be a substantial investment of time, probably about a day a week. I quote:
Candidates should have the capacity to commit the time this role requires. For those in institutional positions, we ask for a brief letter or statement from your employer or supervisor confirming support for this commitment. Independent researchers, consultants, or others without a traditional institutional affiliation should include a brief statement describing how they plan to allocate the time.
P.S. Today OJAp published its 100th paper of 2026 so far…
P.P.S. I’ll be stepping down as Editor-in-Chief at OJAp in a couple of years, when I retire, and we’ll be doing a similar search nearer the date.
#ArfonSmith #DiamondOpenAccessPublishing #JOSS #JournalOfOpenSourceSoftware #OJAp #OpenJournalOfAstrophysics #openSourceSoftware #TheOpenJournalOfAstrophysics

#theopenjournalofastrophysics #opensourcesoftware #openjournalofastrophysics #ojap #journalofopensourcesoftware #joss
In the Dark @[email protected] · 2026-05-11 · 09:01 UTC

Editorial Opportunity at the Journal of Open Source Software

The Journal of Open Source Software – known to its friends as JOSS – is is a developer friendly, diamond open access journal for research software packages which has been running since 2016 and is enormously successful, publishing Open Source software across many fields of science. Its UR, joss.theoj.org, is a giveaway that it is a stablemate of astro.theoj.org, aka the Open Journal of Astrophysics.
The driving force behind JOSS, responsible for getting it off the ground at the very beginning, is Arfon Smith whom I’ve known since Nottingham days and it iis fair to say that without his considerable help, OJAp would never have started. Both journals started off as speculative ventures, and OJAp has taken a considerable time to establish itself, but JOSS took off very quickly indeed and has now published over 3,500 papers. There are numerous differences between the two journals but, like OJAp, all publications in JOSS are free to authors and readers.
Arfon has held the role of Editor-in-Chief at JOSS since 2016 but in a recent blog post he explains that he is stepping down from his role as Editor-in-Chief, although he will remain at JOSS. The call for a replacement is here. It’s an opportunity that will appeal to anyone interested in open-source research software and open-access publishing so if that’s you then please consider applying. It will be a substantial investment of time, probably about a day a week. I quote:
Candidates should have the capacity to commit the time this role requires. For those in institutional positions, we ask for a brief letter or statement from your employer or supervisor confirming support for this commitment. Independent researchers, consultants, or others without a traditional institutional affiliation should include a brief statement describing how they plan to allocate the time.
P.S. Today OJAp published its 100th paper of 2026 so far…
P.P.S. I’ll be stepping down as Editor-in-Chief at OJAp in a couple of years, when I retire, and we’ll be doing a similar search nearer the date.
#ArfonSmith #DiamondOpenAccessPublishing #JOSS #JournalOfOpenSourceSoftware #OJAp #OpenJournalOfAstrophysics #openSourceSoftware #TheOpenJournalOfAstrophysics

#arfonsmith #diamondopenaccesspublishing #joss #journalofopensourcesoftware #ojap #openjournalofastrophysics
In the Dark @[email protected] · 2026-04-09 · 16:02 UTC

An independent arXiv

I’m a bit late passing this news on, but a few weeks ago arXiv announced that from 1st July 2026 it will be establishing itself as an “independent nonprofit organization”. It has been hosted for many years by Cornell University. You can read here about the reasons for this and how it will work, and there is a lengthier article in Science magazine, but the quick summary is
This transition allows for faster technological development, greater organizational flexibility, expanded partnerships, and long-term financial sustainability. A platform built by scientists for scientists, the new arXiv will continue to serve researchers worldwide with the same dedication to free and open scientific discovery.
Such a move creates opportunities, but also carries risks. The sustainability of the new-look arXiv will depend on finding appropriate sources of income, for example. I wish arXiv well in this move. There’s an advertisement for the post of Chief Executive, if anyone fancies the job!
One possible future model for the Open Journal of Astrophysics is as a standalone non-profit organization of some sort, funded also by donations. Currently we are funded by the Library at Maynooth University, where I am based. Having made the decision not to charge fees of any kind, we lack any source of income other than the University. I am very grateful for that support, but we are run on a very tight budget. We keep costs to an absolute minimum, but are not free.
I have written before about what I think the future of Diamond Open Access could look like. I would like to see a range of Diamond Open Access journals offering a choice for authors and serving different sub-disciplines. Most universities nowadays have publishing operations so there could be network of federated journals, some based on arXiv and some based on other repositories and others with different models, such as SciPost. Perhaps institutions are worried about the expense but, as we have shown the actual cost, is far less than they are wasting on Article Processing Charges.
Everything is working well right now at OJAp, but it is not reasonable that the expense of running a journal that serves the global astrophysics community should fall entirely on one small University in Ireland. It won’t be sustainable in the long run, either, if we continue to grow at the present rate. Compare us with the Diamond Open Access publisher SCIPOST, which has a long list of sponsors covering its costs; we have none. My only hope at the moment of turning OJAp into an independent organization is to win the lottery!
Another thing makes me nervous. Many modern universities, which are nominally non-profit institutions, are managed by people who care far more about revenue generation than about academic scholarship and research. I worry that someone upstairs might pressurize us to introduce charges to generate income by threatening to close us down.
I know that money is very tight in astrophysics these days but if you have access to any potential sources of funding – then please consider supporting OJAp!
#arXiv #CornellUniversity #OpenAccess #OpenJournalOfAstrophysics

#arxiv #cornelluniversity #openaccess #openjournalofastrophysics
In the Dark @[email protected] · 2026-04-09 · 16:02 UTC

An independent arXiv

I’m a bit late passing this news on, but a few weeks ago arXiv announced that from 1st July 2026 it will be establishing itself as an “independent nonprofit organization”. It has been hosted for many years by Cornell University. You can read here about the reasons for this and how it will work, and there is a lengthier article in Science magazine, but the quick summary is
This transition allows for faster technological development, greater organizational flexibility, expanded partnerships, and long-term financial sustainability. A platform built by scientists for scientists, the new arXiv will continue to serve researchers worldwide with the same dedication to free and open scientific discovery.
Such a move creates opportunities, but also carries risks. The sustainability of the new-look arXiv will depend on finding appropriate sources of income, for example. I wish arXiv well in this move. There’s an advertisement for the post of Chief Executive, if anyone fancies the job!
One possible future model for the Open Journal of Astrophysics is as a standalone non-profit organization of some sort, funded also by donations. Currently we are funded by the Library at Maynooth University, where I am based. Having made the decision not to charge fees of any kind, we lack any source of income other than the University. I am very grateful for that support, but we are run on a very tight budget. We keep costs to an absolute minimum, but are not free.
I have written before about what I think the future of Diamond Open Access could look like. I would like to see a range of Diamond Open Access journals offering a choice for authors and serving different sub-disciplines. Most universities nowadays have publishing operations so there could be network of federated journals, some based on arXiv and some based on other repositories and others with different models, such as SciPost. Perhaps institutions are worried about the expense but, as we have shown the actual cost, is far less than they are wasting on Article Processing Charges.
Everything is working well right now at OJAp, but it is not reasonable that the expense of running a journal that serves the global astrophysics community should fall entirely on one small University in Ireland. It won’t be sustainable in the long run, either, if we continue to grow at the present rate. Compare us with the Diamond Open Access publisher SCIPOST, which has a long list of sponsors covering its costs; we have none. My only hope at the moment of turning OJAp into an independent organization is to win the lottery!
Another thing makes me nervous. Many modern universities, which are nominally non-profit institutions, are managed by people who care far more about revenue generation than about academic scholarship and research. I worry that someone upstairs might pressurize us to introduce charges to generate income by threatening to close us down.
I know that money is very tight in astrophysics these days but if you have access to any potential sources of funding – then please consider supporting OJAp!
#arXiv #CornellUniversity #OpenAccess #OpenJournalOfAstrophysics

#arxiv #cornelluniversity #openaccess #openjournalofastrophysics
In the Dark @[email protected] · 2026-04-09 · 16:02 UTC

An independent arXiv

I’m a bit late passing this news on, but a few weeks ago arXiv announced that from 1st July 2026 it will be establishing itself as an “independent nonprofit organization”. It has been hosted for many years by Cornell University. You can read here about the reasons for this and how it will work, and there is a lengthier article in Science magazine, but the quick summary is
This transition allows for faster technological development, greater organizational flexibility, expanded partnerships, and long-term financial sustainability. A platform built by scientists for scientists, the new arXiv will continue to serve researchers worldwide with the same dedication to free and open scientific discovery.
Such a move creates opportunities, but also carries risks. The sustainability of the new-look arXiv will depend on finding appropriate sources of income, for example. I wish arXiv well in this move. There’s an advertisement for the post of Chief Executive, if anyone fancies the job!
One possible future model for the Open Journal of Astrophysics is as a standalone non-profit organization of some sort, funded also by donations. Currently we are funded by the Library at Maynooth University, where I am based. Having made the decision not to charge fees of any kind, we lack any source of income other than the University. I am very grateful for that support, but we are run on a very tight budget. We keep costs to an absolute minimum, but are not free.
I have written before about what I think the future of Diamond Open Access could look like. I would like to see a range of Diamond Open Access journals offering a choice for authors and serving different sub-disciplines. Most universities nowadays have publishing operations so there could be network of federated journals, some based on arXiv and some based on other repositories and others with different models, such as SciPost. Perhaps institutions are worried about the expense but, as we have shown the actual cost, is far less than they are wasting on Article Processing Charges.
Everything is working well right now at OJAp, but it is not reasonable that the expense of running a journal that serves the global astrophysics community should fall entirely on one small University in Ireland. It won’t be sustainable in the long run, either, if we continue to grow at the present rate. Compare us with the Diamond Open Access publisher SCIPOST, which has a long list of sponsors covering its costs; we have none. My only hope at the moment of turning OJAp into an independent organization is to win the lottery!
Another thing makes me nervous. Many modern universities, which are nominally non-profit institutions, are managed by people who care far more about revenue generation than about academic scholarship and research. I worry that someone upstairs might pressurize us to introduce charges to generate income by threatening to close us down.
I know that money is very tight in astrophysics these days but if you have access to any potential sources of funding – then please consider supporting OJAp!
#arXiv #CornellUniversity #OpenAccess #OpenJournalOfAstrophysics

#arxiv #cornelluniversity #openaccess #openjournalofastrophysics
In the Dark @[email protected] · 2026-04-09 · 16:02 UTC

An independent arXiv

I’m a bit late passing this news on, but a few weeks ago arXiv announced that from 1st July 2026 it will be establishing itself as an “independent nonprofit organization”. It has been hosted for many years by Cornell University. You can read here about the reasons for this and how it will work, and there is a lengthier article in Science magazine, but the quick summary is
This transition allows for faster technological development, greater organizational flexibility, expanded partnerships, and long-term financial sustainability. A platform built by scientists for scientists, the new arXiv will continue to serve researchers worldwide with the same dedication to free and open scientific discovery.
Such a move creates opportunities, but also carries risks. The sustainability of the new-look arXiv will depend on finding appropriate sources of income, for example. I wish arXiv well in this move. There’s an advertisement for the post of Chief Executive, if anyone fancies the job!
One possible future model for the Open Journal of Astrophysics is as a standalone non-profit organization of some sort, funded also by donations. Currently we are funded by the Library at Maynooth University, where I am based. Having made the decision not to charge fees of any kind, we lack any source of income other than the University. I am very grateful for that support, but we are run on a very tight budget. We keep costs to an absolute minimum, but are not free.
I have written before about what I think the future of Diamond Open Access could look like. I would like to see a range of Diamond Open Access journals offering a choice for authors and serving different sub-disciplines. Most universities nowadays have publishing operations so there could be network of federated journals, some based on arXiv and some based on other repositories and others with different models, such as SciPost. Perhaps institutions are worried about the expense but, as we have shown the actual cost, is far less than they are wasting on Article Processing Charges.
Everything is working well right now at OJAp, but it is not reasonable that the expense of running a journal that serves the global astrophysics community should fall entirely on one small University in Ireland. It won’t be sustainable in the long run, either, if we continue to grow at the present rate. Compare us with the Diamond Open Access publisher SCIPOST, which has a long list of sponsors covering its costs; we have none. My only hope at the moment of turning OJAp into an independent organization is to win the lottery!
Another thing makes me nervous. Many modern universities, which are nominally non-profit institutions, are managed by people who care far more about revenue generation than about academic scholarship and research. I worry that someone upstairs might pressurize us to introduce charges to generate income by threatening to close us down.
I know that money is very tight in astrophysics these days but if you have access to any potential sources of funding – then please consider supporting OJAp!
#arXiv #CornellUniversity #OpenAccess #OpenJournalOfAstrophysics

#openjournalofastrophysics #openaccess #cornelluniversity #arxiv
In the Dark @[email protected] · 2026-04-09 · 16:02 UTC

An independent arXiv

I’m a bit late passing this news on, but a few weeks ago arXiv announced that from 1st July 2026 it will be establishing itself as an “independent nonprofit organization”. It has been hosted for many years by Cornell University. You can read here about the reasons for this and how it will work, and there is a lengthier article in Science magazine, but the quick summary is
This transition allows for faster technological development, greater organizational flexibility, expanded partnerships, and long-term financial sustainability. A platform built by scientists for scientists, the new arXiv will continue to serve researchers worldwide with the same dedication to free and open scientific discovery.
Such a move creates opportunities, but also carries risks. The sustainability of the new-look arXiv will depend on finding appropriate sources of income, for example. I wish arXiv well in this move. There’s an advertisement for the post of Chief Executive, if anyone fancies the job!
One possible future model for the Open Journal of Astrophysics is as a standalone non-profit organization of some sort, funded also by donations. Currently we are funded by the Library at Maynooth University, where I am based. Having made the decision not to charge fees of any kind, we lack any source of income other than the University. I am very grateful for that support, but we are run on a very tight budget. We keep costs to an absolute minimum, but are not free.
I have written before about what I think the future of Diamond Open Access could look like. I would like to see a range of Diamond Open Access journals offering a choice for authors and serving different sub-disciplines. Most universities nowadays have publishing operations so there could be network of federated journals, some based on arXiv and some based on other repositories and others with different models, such as SciPost. Perhaps institutions are worried about the expense but, as we have shown the actual cost, is far less than they are wasting on Article Processing Charges.
Everything is working well right now at OJAp, but it is not reasonable that the expense of running a journal that serves the global astrophysics community should fall entirely on one small University in Ireland. It won’t be sustainable in the long run, either, if we continue to grow at the present rate. Compare us with the Diamond Open Access publisher SCIPOST, which has a long list of sponsors covering its costs; we have none. My only hope at the moment of turning OJAp into an independent organization is to win the lottery!
Another thing makes me nervous. Many modern universities, which are nominally non-profit institutions, are managed by people who care far more about revenue generation than about academic scholarship and research. I worry that someone upstairs might pressurize us to introduce charges to generate income by threatening to close us down.
I know that money is very tight in astrophysics these days but if you have access to any potential sources of funding – then please consider supporting OJAp!
#arXiv #CornellUniversity #OpenAccess #OpenJournalOfAstrophysics

#arxiv #cornelluniversity #openaccess #openjournalofastrophysics
In the Dark @[email protected] · 2026-02-07 · 12:11 UTC

Weekly Update from the Open Journal of Astrophysics – 07/02/2026

It’s Saturday once more so time for another update of activity at the Open Journal of Astrophysics. Since the last update we have published a further six papers, bringing the number in Volume 9 (2026) to 24 and the total so far published by OJAp up to 472.
I will continue to include the posts made on our Mastodon account (on Fediscience) to encourage you to visit it. Mastodon is a really excellent service, and a more than adequate replacement for X/Twitter which nobody should be using; these announcement also show the DOI for each paper.
The first paper to report this week is “The Impact of Star Formation and Feedback Recipes on the Stellar Mass and Interstellar Medium of High-Redshift Galaxies” by Harley Katz (U. Chicago, USA), Martin P. Rey (U. Oxford, UK), Corentin Cadiou (Lund U., Sweden) Taysun Kimm (Yonsei U., Korea) and Oscar Agertz (Lund). This paper was published on Monday 2nd February 2026 in the folder Astrophysics of Galaxies. It introduces MEGATRON, a new model for galaxy formation simulations, highlighting that feedback energy controls star formation at high redshift and highlighting the importance of the interstellar medium.
The overlay is here:

You can find the officially accepted version on arXiv here and the announcement on Fediverse here:
https://fediscience.org/@OJ_Astro/116000695648050758
The second paper is “Photometric Redshifts in JWST Deep Fields: A Pixel-Based Alternative with DeepDISC” by Grant Merz (U. Illinois at Urbana-Champaign) and 6 others, all based in the USA. This paper was published on Monday February 2nd 2026 in the folder Instrumentation and Methods for Astrophysics. This paper explores the effectiveness of the DeepDISC machine learning algorithm in estimating photometric redshifts from near-infrared data, demonstrating its potential for larger image volumes and spectroscopic samples
The overlay for this one is here:

The official version of the paper can be found on arXiv here and the Fediverse announcement here:
https://fediscience.org/@OJ_Astro/116000777572439111
Next, published on Wednesday 4th February in the folder Astrophysics of Galaxies, is “Inferring Interstellar Medium Density, Temperature, and Metallicity from Turbulent H II Regions” by Larrance Xing (U. Chicago, USA), Nicholas Choustikov (U. Oxford, UK), Harley Katz (U. Chicago) and Alex J. Cameron (DAWN, Denmark). This paper argues that supersonic turbulenc affects the interpretation of H II region properties, potentially impacting inferred metallicity, ionization, and excitation from in nebular emission lines, motivating more extensive modelling.
The overlay is here:

The official version can be found on arXiv here and the Fediverse announcement is here:
https://fediscience.org/@OJ_Astro/116011384659092223
The fourth paper this week, also published on Wednesday 4th February, but in the folder Solar and Stellar Astrophysics, is “A Systematic Search for Big Dippers in ASAS-SN” by B. JoHantgen, D. M. Rowan, R. Forés-Toribio, C. S. Kochanek, & K. Z. Stanek (Ohio State University, USA), B. J. Shappee (U. Hawaii, USA), Subo Dong (Peking University), J. L. Prieto Universidad Diego Portales, Chile) and Todd A. Thompson (Ohio State). This study identifies 4 new dipper stars and 15 long-period eclipsing binary candidates using ASAS-SN light curves and multi-wavelength data, categorizing them based on their characteristics.
Here is the overlay:
The official version can be found on arXiv here and the Fediverse announcement is here:
https://fediscience.org/@OJ_Astro/116011460612040834
Fifth, and next to last this week we have “Unveiling the drivers of the Baryon Cycles with Interpretable Multi-step Machine Learning and Simulations” by Mst Shamima Khanom, Benjamin W. Keller and Javier Ignacio Saavedra Moreno (U. Memphis, USA). This paper was published on Thursday 5th February 2026 in the folder Astrophysics of Galaxies. This study uses machine learning methods to understand how galaxies lose or retain baryons, highlighting the relationship between baryon fraction and various galactic measurements.
The overlay is here:

The accepted version can be found on arXiv here, and the fediverse announcement is here:
https://fediscience.org/@OJ_Astro/116016883984380622
Finally for this week we have “The Bispectrum of Intrinsic Alignments: II. Precision Comparison Against Dark Matter Simulations” by Thomas Bakx (Utrecht U., Netherlands), Toshiki Kurita (MPA Garching, Germany), Alexander Eggemeier (U. Bonn, Germany), Nora Elisa Chisari (Utrecht) and Zvonimir Vlah (Ruđer Bošković Institute, Croatia). This paper was accepted in December, but publication got delayed by the Christmas effect so was published on February 6th 2026, in the folder Cosmology and Nongalactic Astrophysics. This study uses N-body simulations to accurately measure three-dimensional bispectra of halo intrinsic alignments and dark matter overdensities, providing a method to determine higher order shape bias parameters.
The overlay is here:

You can find the published version of the article here, and the Mastodon announcement is here:
https://fediscience.org/@OJ_Astro/116022562915557971
And that concludes this week’s update. I will do another next Saturday.
#arXiv241107282v2 #arXiv250409744v3 #arXiv250706818v3 #arXiv250719594v2 #arXiv251027032v2 #arXiv260202949v1 #ASASSN #AstridSimulations #AstrophysicsOfGalaxies #bispectrum #CosmologyAndNonGalacticAstrophysics #DEEPDisc #DiamondOpenAccess #DiamondOpenAccessPublishing #dipperStars #galaxyClusters #galaxyFormation #galaxyHaloes #HighEnergyAstrophysicalPhenomena #HIIRegions #InstrumentationAndMethodsForAstrophysics #InterstellarMedium #intrinsicAlignments #JWST #largeScaleStructureOfTheUniverse #MachineLearning #MEGATRON #NebularEmission #OpenAccess #OpenAccessPublishing #OpenJournalOfAstrophysics #PhotometricRedshifts #SolarAndStellarAstrophysics #starFormation #TheOpenJournalOfAstrophysics #Turbulence

#arxiv241107282v2 #arxiv250409744v3 #arxiv250706818v3 #arxiv250719594v2 #arxiv251027032v2 #arxiv260202949v1
In the Dark @[email protected] · 2026-02-07 · 12:11 UTC

Weekly Update from the Open Journal of Astrophysics – 07/02/2026

It’s Saturday once more so time for another update of activity at the Open Journal of Astrophysics. Since the last update we have published a further six papers, bringing the number in Volume 9 (2026) to 24 and the total so far published by OJAp up to 472.
I will continue to include the posts made on our Mastodon account (on Fediscience) to encourage you to visit it. Mastodon is a really excellent service, and a more than adequate replacement for X/Twitter which nobody should be using; these announcement also show the DOI for each paper.
The first paper to report this week is “The Impact of Star Formation and Feedback Recipes on the Stellar Mass and Interstellar Medium of High-Redshift Galaxies” by Harley Katz (U. Chicago, USA), Martin P. Rey (U. Oxford, UK), Corentin Cadiou (Lund U., Sweden) Taysun Kimm (Yonsei U., Korea) and Oscar Agertz (Lund). This paper was published on Monday 2nd February 2026 in the folder Astrophysics of Galaxies. It introduces MEGATRON, a new model for galaxy formation simulations, highlighting that feedback energy controls star formation at high redshift and highlighting the importance of the interstellar medium.
The overlay is here:

You can find the officially accepted version on arXiv here and the announcement on Fediverse here:
https://fediscience.org/@OJ_Astro/116000695648050758
The second paper is “Photometric Redshifts in JWST Deep Fields: A Pixel-Based Alternative with DeepDISC” by Grant Merz (U. Illinois at Urbana-Champaign) and 6 others, all based in the USA. This paper was published on Monday February 2nd 2026 in the folder Instrumentation and Methods for Astrophysics. This paper explores the effectiveness of the DeepDISC machine learning algorithm in estimating photometric redshifts from near-infrared data, demonstrating its potential for larger image volumes and spectroscopic samples
The overlay for this one is here:

The official version of the paper can be found on arXiv here and the Fediverse announcement here:
https://fediscience.org/@OJ_Astro/116000777572439111
Next, published on Wednesday 4th February in the folder Astrophysics of Galaxies, is “Inferring Interstellar Medium Density, Temperature, and Metallicity from Turbulent H II Regions” by Larrance Xing (U. Chicago, USA), Nicholas Choustikov (U. Oxford, UK), Harley Katz (U. Chicago) and Alex J. Cameron (DAWN, Denmark). This paper argues that supersonic turbulenc affects the interpretation of H II region properties, potentially impacting inferred metallicity, ionization, and excitation from in nebular emission lines, motivating more extensive modelling.
The overlay is here:

The official version can be found on arXiv here and the Fediverse announcement is here:
https://fediscience.org/@OJ_Astro/116011384659092223
The fourth paper this week, also published on Wednesday 4th February, but in the folder Solar and Stellar Astrophysics, is “A Systematic Search for Big Dippers in ASAS-SN” by B. JoHantgen, D. M. Rowan, R. Forés-Toribio, C. S. Kochanek, & K. Z. Stanek (Ohio State University, USA), B. J. Shappee (U. Hawaii, USA), Subo Dong (Peking University), J. L. Prieto Universidad Diego Portales, Chile) and Todd A. Thompson (Ohio State). This study identifies 4 new dipper stars and 15 long-period eclipsing binary candidates using ASAS-SN light curves and multi-wavelength data, categorizing them based on their characteristics.
Here is the overlay:
The official version can be found on arXiv here and the Fediverse announcement is here:
https://fediscience.org/@OJ_Astro/116011460612040834
Fifth, and next to last this week we have “Unveiling the drivers of the Baryon Cycles with Interpretable Multi-step Machine Learning and Simulations” by Mst Shamima Khanom, Benjamin W. Keller and Javier Ignacio Saavedra Moreno (U. Memphis, USA). This paper was published on Thursday 5th February 2026 in the folder Astrophysics of Galaxies. This study uses machine learning methods to understand how galaxies lose or retain baryons, highlighting the relationship between baryon fraction and various galactic measurements.
The overlay is here:

The accepted version can be found on arXiv here, and the fediverse announcement is here:
https://fediscience.org/@OJ_Astro/116016883984380622
Finally for this week we have “The Bispectrum of Intrinsic Alignments: II. Precision Comparison Against Dark Matter Simulations” by Thomas Bakx (Utrecht U., Netherlands), Toshiki Kurita (MPA Garching, Germany), Alexander Eggemeier (U. Bonn, Germany), Nora Elisa Chisari (Utrecht) and Zvonimir Vlah (Ruđer Bošković Institute, Croatia). This paper was accepted in December, but publication got delayed by the Christmas effect so was published on February 6th 2026, in the folder Cosmology and Nongalactic Astrophysics. This study uses N-body simulations to accurately measure three-dimensional bispectra of halo intrinsic alignments and dark matter overdensities, providing a method to determine higher order shape bias parameters.
The overlay is here:

You can find the published version of the article here, and the Mastodon announcement is here:
https://fediscience.org/@OJ_Astro/116022562915557971
And that concludes this week’s update. I will do another next Saturday.
#arXiv241107282v2 #arXiv250409744v3 #arXiv250706818v3 #arXiv250719594v2 #arXiv251027032v2 #arXiv260202949v1 #ASASSN #AstridSimulations #AstrophysicsOfGalaxies #bispectrum #CosmologyAndNonGalacticAstrophysics #DEEPDisc #DiamondOpenAccess #DiamondOpenAccessPublishing #dipperStars #galaxyClusters #galaxyFormation #galaxyHaloes #HighEnergyAstrophysicalPhenomena #HIIRegions #InstrumentationAndMethodsForAstrophysics #InterstellarMedium #intrinsicAlignments #JWST #largeScaleStructureOfTheUniverse #MachineLearning #MEGATRON #NebularEmission #OpenAccess #OpenAccessPublishing #OpenJournalOfAstrophysics #PhotometricRedshifts #SolarAndStellarAstrophysics #starFormation #TheOpenJournalOfAstrophysics #Turbulence

#arxiv241107282v2 #arxiv250409744v3 #arxiv250706818v3 #arxiv250719594v2 #arxiv251027032v2 #arxiv260202949v1
In the Dark @[email protected] · 2026-02-07 · 12:11 UTC

Weekly Update from the Open Journal of Astrophysics – 07/02/2026

It’s Saturday once more so time for another update of activity at the Open Journal of Astrophysics. Since the last update we have published a further six papers, bringing the number in Volume 9 (2026) to 24 and the total so far published by OJAp up to 472.
I will continue to include the posts made on our Mastodon account (on Fediscience) to encourage you to visit it. Mastodon is a really excellent service, and a more than adequate replacement for X/Twitter which nobody should be using; these announcement also show the DOI for each paper.
The first paper to report this week is “The Impact of Star Formation and Feedback Recipes on the Stellar Mass and Interstellar Medium of High-Redshift Galaxies” by Harley Katz (U. Chicago, USA), Martin P. Rey (U. Oxford, UK), Corentin Cadiou (Lund U., Sweden) Taysun Kimm (Yonsei U., Korea) and Oscar Agertz (Lund). This paper was published on Monday 2nd February 2026 in the folder Astrophysics of Galaxies. It introduces MEGATRON, a new model for galaxy formation simulations, highlighting that feedback energy controls star formation at high redshift and highlighting the importance of the interstellar medium.
The overlay is here:

You can find the officially accepted version on arXiv here and the announcement on Fediverse here:
https://fediscience.org/@OJ_Astro/116000695648050758
The second paper is “Photometric Redshifts in JWST Deep Fields: A Pixel-Based Alternative with DeepDISC” by Grant Merz (U. Illinois at Urbana-Champaign) and 6 others, all based in the USA. This paper was published on Monday February 2nd 2026 in the folder Instrumentation and Methods for Astrophysics. This paper explores the effectiveness of the DeepDISC machine learning algorithm in estimating photometric redshifts from near-infrared data, demonstrating its potential for larger image volumes and spectroscopic samples
The overlay for this one is here:

The official version of the paper can be found on arXiv here and the Fediverse announcement here:
https://fediscience.org/@OJ_Astro/116000777572439111
Next, published on Wednesday 4th February in the folder Astrophysics of Galaxies, is “Inferring Interstellar Medium Density, Temperature, and Metallicity from Turbulent H II Regions” by Larrance Xing (U. Chicago, USA), Nicholas Choustikov (U. Oxford, UK), Harley Katz (U. Chicago) and Alex J. Cameron (DAWN, Denmark). This paper argues that supersonic turbulenc affects the interpretation of H II region properties, potentially impacting inferred metallicity, ionization, and excitation from in nebular emission lines, motivating more extensive modelling.
The overlay is here:

The official version can be found on arXiv here and the Fediverse announcement is here:
https://fediscience.org/@OJ_Astro/116011384659092223
The fourth paper this week, also published on Wednesday 4th February, but in the folder Solar and Stellar Astrophysics, is “A Systematic Search for Big Dippers in ASAS-SN” by B. JoHantgen, D. M. Rowan, R. Forés-Toribio, C. S. Kochanek, & K. Z. Stanek (Ohio State University, USA), B. J. Shappee (U. Hawaii, USA), Subo Dong (Peking University), J. L. Prieto Universidad Diego Portales, Chile) and Todd A. Thompson (Ohio State). This study identifies 4 new dipper stars and 15 long-period eclipsing binary candidates using ASAS-SN light curves and multi-wavelength data, categorizing them based on their characteristics.
Here is the overlay:
The official version can be found on arXiv here and the Fediverse announcement is here:
https://fediscience.org/@OJ_Astro/116011460612040834
Fifth, and next to last this week we have “Unveiling the drivers of the Baryon Cycles with Interpretable Multi-step Machine Learning and Simulations” by Mst Shamima Khanom, Benjamin W. Keller and Javier Ignacio Saavedra Moreno (U. Memphis, USA). This paper was published on Thursday 5th February 2026 in the folder Astrophysics of Galaxies. This study uses machine learning methods to understand how galaxies lose or retain baryons, highlighting the relationship between baryon fraction and various galactic measurements.
The overlay is here:

The accepted version can be found on arXiv here, and the fediverse announcement is here:
https://fediscience.org/@OJ_Astro/116016883984380622
Finally for this week we have “The Bispectrum of Intrinsic Alignments: II. Precision Comparison Against Dark Matter Simulations” by Thomas Bakx (Utrecht U., Netherlands), Toshiki Kurita (MPA Garching, Germany), Alexander Eggemeier (U. Bonn, Germany), Nora Elisa Chisari (Utrecht) and Zvonimir Vlah (Ruđer Bošković Institute, Croatia). This paper was accepted in December, but publication got delayed by the Christmas effect so was published on February 6th 2026, in the folder Cosmology and Nongalactic Astrophysics. This study uses N-body simulations to accurately measure three-dimensional bispectra of halo intrinsic alignments and dark matter overdensities, providing a method to determine higher order shape bias parameters.
The overlay is here:

You can find the published version of the article here, and the Mastodon announcement is here:
https://fediscience.org/@OJ_Astro/116022562915557971
And that concludes this week’s update. I will do another next Saturday.
#arXiv241107282v2 #arXiv250409744v3 #arXiv250706818v3 #arXiv250719594v2 #arXiv251027032v2 #arXiv260202949v1 #ASASSN #AstridSimulations #AstrophysicsOfGalaxies #bispectrum #CosmologyAndNonGalacticAstrophysics #DEEPDisc #DiamondOpenAccess #DiamondOpenAccessPublishing #dipperStars #galaxyClusters #galaxyFormation #galaxyHaloes #HighEnergyAstrophysicalPhenomena #HIIRegions #InstrumentationAndMethodsForAstrophysics #InterstellarMedium #intrinsicAlignments #JWST #largeScaleStructureOfTheUniverse #MachineLearning #MEGATRON #NebularEmission #OpenAccess #OpenAccessPublishing #OpenJournalOfAstrophysics #PhotometricRedshifts #SolarAndStellarAstrophysics #starFormation #TheOpenJournalOfAstrophysics #Turbulence

#astrophysicsofgalaxies #bispectrum #cosmologyandnongalacticastrophysics #deepdisc #diamondopenaccess #diamondopenaccesspublishing
In the Dark @[email protected] · 2026-02-07 · 12:11 UTC

Weekly Update from the Open Journal of Astrophysics – 07/02/2026

It’s Saturday once more so time for another update of activity at the Open Journal of Astrophysics. Since the last update we have published a further six papers, bringing the number in Volume 9 (2026) to 24 and the total so far published by OJAp up to 472.
I will continue to include the posts made on our Mastodon account (on Fediscience) to encourage you to visit it. Mastodon is a really excellent service, and a more than adequate replacement for X/Twitter which nobody should be using; these announcement also show the DOI for each paper.
The first paper to report this week is “The Impact of Star Formation and Feedback Recipes on the Stellar Mass and Interstellar Medium of High-Redshift Galaxies” by Harley Katz (U. Chicago, USA), Martin P. Rey (U. Oxford, UK), Corentin Cadiou (Lund U., Sweden) Taysun Kimm (Yonsei U., Korea) and Oscar Agertz (Lund). This paper was published on Monday 2nd February 2026 in the folder Astrophysics of Galaxies. It introduces MEGATRON, a new model for galaxy formation simulations, highlighting that feedback energy controls star formation at high redshift and highlighting the importance of the interstellar medium.
The overlay is here:

You can find the officially accepted version on arXiv here and the announcement on Fediverse here:
https://fediscience.org/@OJ_Astro/116000695648050758
The second paper is “Photometric Redshifts in JWST Deep Fields: A Pixel-Based Alternative with DeepDISC” by Grant Merz (U. Illinois at Urbana-Champaign) and 6 others, all based in the USA. This paper was published on Monday February 2nd 2026 in the folder Instrumentation and Methods for Astrophysics. This paper explores the effectiveness of the DeepDISC machine learning algorithm in estimating photometric redshifts from near-infrared data, demonstrating its potential for larger image volumes and spectroscopic samples
The overlay for this one is here:

The official version of the paper can be found on arXiv here and the Fediverse announcement here:
https://fediscience.org/@OJ_Astro/116000777572439111
Next, published on Wednesday 4th February in the folder Astrophysics of Galaxies, is “Inferring Interstellar Medium Density, Temperature, and Metallicity from Turbulent H II Regions” by Larrance Xing (U. Chicago, USA), Nicholas Choustikov (U. Oxford, UK), Harley Katz (U. Chicago) and Alex J. Cameron (DAWN, Denmark). This paper argues that supersonic turbulenc affects the interpretation of H II region properties, potentially impacting inferred metallicity, ionization, and excitation from in nebular emission lines, motivating more extensive modelling.
The overlay is here:

The official version can be found on arXiv here and the Fediverse announcement is here:
https://fediscience.org/@OJ_Astro/116011384659092223
The fourth paper this week, also published on Wednesday 4th February, but in the folder Solar and Stellar Astrophysics, is “A Systematic Search for Big Dippers in ASAS-SN” by B. JoHantgen, D. M. Rowan, R. Forés-Toribio, C. S. Kochanek, & K. Z. Stanek (Ohio State University, USA), B. J. Shappee (U. Hawaii, USA), Subo Dong (Peking University), J. L. Prieto Universidad Diego Portales, Chile) and Todd A. Thompson (Ohio State). This study identifies 4 new dipper stars and 15 long-period eclipsing binary candidates using ASAS-SN light curves and multi-wavelength data, categorizing them based on their characteristics.
Here is the overlay:
The official version can be found on arXiv here and the Fediverse announcement is here:
https://fediscience.org/@OJ_Astro/116011460612040834
Fifth, and next to last this week we have “Unveiling the drivers of the Baryon Cycles with Interpretable Multi-step Machine Learning and Simulations” by Mst Shamima Khanom, Benjamin W. Keller and Javier Ignacio Saavedra Moreno (U. Memphis, USA). This paper was published on Thursday 5th February 2026 in the folder Astrophysics of Galaxies. This study uses machine learning methods to understand how galaxies lose or retain baryons, highlighting the relationship between baryon fraction and various galactic measurements.
The overlay is here:

The accepted version can be found on arXiv here, and the fediverse announcement is here:
https://fediscience.org/@OJ_Astro/116016883984380622
Finally for this week we have “The Bispectrum of Intrinsic Alignments: II. Precision Comparison Against Dark Matter Simulations” by Thomas Bakx (Utrecht U., Netherlands), Toshiki Kurita (MPA Garching, Germany), Alexander Eggemeier (U. Bonn, Germany), Nora Elisa Chisari (Utrecht) and Zvonimir Vlah (Ruđer Bošković Institute, Croatia). This paper was accepted in December, but publication got delayed by the Christmas effect so was published on February 6th 2026, in the folder Cosmology and Nongalactic Astrophysics. This study uses N-body simulations to accurately measure three-dimensional bispectra of halo intrinsic alignments and dark matter overdensities, providing a method to determine higher order shape bias parameters.
The overlay is here:

You can find the published version of the article here, and the Mastodon announcement is here:
https://fediscience.org/@OJ_Astro/116022562915557971
And that concludes this week’s update. I will do another next Saturday.
#arXiv241107282v2 #arXiv250409744v3 #arXiv250706818v3 #arXiv250719594v2 #arXiv251027032v2 #arXiv260202949v1 #ASASSN #AstridSimulations #AstrophysicsOfGalaxies #bispectrum #CosmologyAndNonGalacticAstrophysics #DEEPDisc #DiamondOpenAccess #DiamondOpenAccessPublishing #dipperStars #galaxyClusters #galaxyFormation #galaxyHaloes #HighEnergyAstrophysicalPhenomena #HIIRegions #InstrumentationAndMethodsForAstrophysics #InterstellarMedium #intrinsicAlignments #JWST #largeScaleStructureOfTheUniverse #MachineLearning #MEGATRON #NebularEmission #OpenAccess #OpenAccessPublishing #OpenJournalOfAstrophysics #PhotometricRedshifts #SolarAndStellarAstrophysics #starFormation #TheOpenJournalOfAstrophysics #Turbulence

#turbulence #theopenjournalofastrophysics #starformation #solarandstellarastrophysics #photometricredshifts #openjournalofastrophysics
In the Dark @[email protected] · 2026-02-07 · 12:11 UTC

Weekly Update from the Open Journal of Astrophysics – 07/02/2026

It’s Saturday once more so time for another update of activity at the Open Journal of Astrophysics. Since the last update we have published a further six papers, bringing the number in Volume 9 (2026) to 24 and the total so far published by OJAp up to 472.
I will continue to include the posts made on our Mastodon account (on Fediscience) to encourage you to visit it. Mastodon is a really excellent service, and a more than adequate replacement for X/Twitter which nobody should be using; these announcement also show the DOI for each paper.
The first paper to report this week is “The Impact of Star Formation and Feedback Recipes on the Stellar Mass and Interstellar Medium of High-Redshift Galaxies” by Harley Katz (U. Chicago, USA), Martin P. Rey (U. Oxford, UK), Corentin Cadiou (Lund U., Sweden) Taysun Kimm (Yonsei U., Korea) and Oscar Agertz (Lund). This paper was published on Monday 2nd February 2026 in the folder Astrophysics of Galaxies. It introduces MEGATRON, a new model for galaxy formation simulations, highlighting that feedback energy controls star formation at high redshift and highlighting the importance of the interstellar medium.
The overlay is here:

You can find the officially accepted version on arXiv here and the announcement on Fediverse here:
https://fediscience.org/@OJ_Astro/116000695648050758
The second paper is “Photometric Redshifts in JWST Deep Fields: A Pixel-Based Alternative with DeepDISC” by Grant Merz (U. Illinois at Urbana-Champaign) and 6 others, all based in the USA. This paper was published on Monday February 2nd 2026 in the folder Instrumentation and Methods for Astrophysics. This paper explores the effectiveness of the DeepDISC machine learning algorithm in estimating photometric redshifts from near-infrared data, demonstrating its potential for larger image volumes and spectroscopic samples
The overlay for this one is here:

The official version of the paper can be found on arXiv here and the Fediverse announcement here:
https://fediscience.org/@OJ_Astro/116000777572439111
Next, published on Wednesday 4th February in the folder Astrophysics of Galaxies, is “Inferring Interstellar Medium Density, Temperature, and Metallicity from Turbulent H II Regions” by Larrance Xing (U. Chicago, USA), Nicholas Choustikov (U. Oxford, UK), Harley Katz (U. Chicago) and Alex J. Cameron (DAWN, Denmark). This paper argues that supersonic turbulenc affects the interpretation of H II region properties, potentially impacting inferred metallicity, ionization, and excitation from in nebular emission lines, motivating more extensive modelling.
The overlay is here:

The official version can be found on arXiv here and the Fediverse announcement is here:
https://fediscience.org/@OJ_Astro/116011384659092223
The fourth paper this week, also published on Wednesday 4th February, but in the folder Solar and Stellar Astrophysics, is “A Systematic Search for Big Dippers in ASAS-SN” by B. JoHantgen, D. M. Rowan, R. Forés-Toribio, C. S. Kochanek, & K. Z. Stanek (Ohio State University, USA), B. J. Shappee (U. Hawaii, USA), Subo Dong (Peking University), J. L. Prieto Universidad Diego Portales, Chile) and Todd A. Thompson (Ohio State). This study identifies 4 new dipper stars and 15 long-period eclipsing binary candidates using ASAS-SN light curves and multi-wavelength data, categorizing them based on their characteristics.
Here is the overlay:
The official version can be found on arXiv here and the Fediverse announcement is here:
https://fediscience.org/@OJ_Astro/116011460612040834
Fifth, and next to last this week we have “Unveiling the drivers of the Baryon Cycles with Interpretable Multi-step Machine Learning and Simulations” by Mst Shamima Khanom, Benjamin W. Keller and Javier Ignacio Saavedra Moreno (U. Memphis, USA). This paper was published on Thursday 5th February 2026 in the folder Astrophysics of Galaxies. This study uses machine learning methods to understand how galaxies lose or retain baryons, highlighting the relationship between baryon fraction and various galactic measurements.
The overlay is here:

The accepted version can be found on arXiv here, and the fediverse announcement is here:
https://fediscience.org/@OJ_Astro/116016883984380622
Finally for this week we have “The Bispectrum of Intrinsic Alignments: II. Precision Comparison Against Dark Matter Simulations” by Thomas Bakx (Utrecht U., Netherlands), Toshiki Kurita (MPA Garching, Germany), Alexander Eggemeier (U. Bonn, Germany), Nora Elisa Chisari (Utrecht) and Zvonimir Vlah (Ruđer Bošković Institute, Croatia). This paper was accepted in December, but publication got delayed by the Christmas effect so was published on February 6th 2026, in the folder Cosmology and Nongalactic Astrophysics. This study uses N-body simulations to accurately measure three-dimensional bispectra of halo intrinsic alignments and dark matter overdensities, providing a method to determine higher order shape bias parameters.
The overlay is here:

You can find the published version of the article here, and the Mastodon announcement is here:
https://fediscience.org/@OJ_Astro/116022562915557971
And that concludes this week’s update. I will do another next Saturday.
#arXiv241107282v2 #arXiv250409744v3 #arXiv250706818v3 #arXiv250719594v2 #arXiv251027032v2 #arXiv260202949v1 #ASASSN #AstridSimulations #AstrophysicsOfGalaxies #bispectrum #CosmologyAndNonGalacticAstrophysics #DEEPDisc #DiamondOpenAccess #DiamondOpenAccessPublishing #dipperStars #galaxyClusters #galaxyFormation #galaxyHaloes #HighEnergyAstrophysicalPhenomena #HIIRegions #InstrumentationAndMethodsForAstrophysics #InterstellarMedium #intrinsicAlignments #JWST #largeScaleStructureOfTheUniverse #MachineLearning #MEGATRON #NebularEmission #OpenAccess #OpenAccessPublishing #OpenJournalOfAstrophysics #PhotometricRedshifts #SolarAndStellarAstrophysics #starFormation #TheOpenJournalOfAstrophysics #Turbulence

#arxiv241107282v2 #arxiv250409744v3 #arxiv250706818v3 #arxiv250719594v2 #arxiv251027032v2 #arxiv260202949v1
In the Dark @[email protected] · 2026-01-31 · 11:20 UTC

Weekly Update from the Open Journal of Astrophysics – 31/01/2026
It’s Saturday once more so time for another update of activity at the Open Journal of Astrophysics. Since the last update we have published a further three papers, bringing the number in Volume 9 (2026) to 18 and the total so far published by OJAp up to 466.
I will continue to include the posts made on our Mastodon account (on Fediscience) to encourage you to visit it. Mastodon is a really excellent service, and a more than adequate replacement for X/Twitter which nobody should be using; these announcement also show the DOI for each paper.
The first paper to report this week is “Probing Stellar Kinematics with the Time-Asymmetric Hanbury Brown and Twiss Effect” by Lucijana Stanic (University of Zurich, Switzerland) and 13 others based in Zurich, Lausanne and Geneva (all in Switzerland). This was published on Monday 26th January 2026 in the folder Instrumentation and Methods for Astrophysics. This research demonstrates that intensity interferometry can reveal internal stellar kinematics, providing a new way to observe stellar dynamics with high time resolution.
The overlay is here:

You can find the officially accepted version on arXiv here and the announcement on Fediverse here:
https://fediscience.org/@OJ_Astro/115961234375736584
The second paper is “DIPLODOCUS I: Framework for the evaluation of relativistic transport equations with continuous forcing and discrete particle interactions” by Christopher N Everett & Garret Cotter (University of Oxford, UK). This was published on Tuesday January 27th 2026 in the folder High-Energy Astrophysical Phenomena. DIPLODOCUS is a new framework for mesoscopic modelling of astrophysical systems, using an integral formulation of relativistic transport equations and a discretisation procedure for particle distributions.
The overlay for this one is here:

The official version of the paper can be found on arXiv here and the Fediverse announcement here:
https://fediscience.org/@OJ_Astro/115966199181415094
Next, also published on Tuesday January 27th but in the folder Cosmology and Nongalactic Astrophysics we have “The Atacama Cosmology Telescope: DR6 Sunyaev-Zel’dovich Selected Galaxy Clusters Catalog” by M. Aguena et al. (101 authors altogether), on behalf of the ACT-DES-HSC Collaboration. This article reports on the discovery of 10,040 galaxy clusters in the Atacama Cosmology Telescope data, including 1,180 clusters at high redshifts, using the Sunyaev-Zel’dovich effect.
The overlay is here:

The official version can be found on arXiv here and the Fediverse announcement is here:
https://fediscience.org/@OJ_Astro/115966458299870033
And finally for this week we have a paper published yesterday, Friday 30th January 2026, in the folder Astrophysics of Galaxies. This is the paper I blogged about yesterday: “A Cosmic Miracle: A Remarkably Luminous Galaxy at zspec = 14.44 Confirmed with JWST” by Rohan Naidu (MIT Kavli Institute) and an international cast of 45 others. This article reports on the discovery by the James Webb Space Telescope (JWST) of a bright galaxy, MoM-z14, located 280 million years post-Big Bang, that challenges models of galaxy formation and the star-formation history of early galaxies.
The overlay is here:

The accepted version can be found on arXiv here, and the fediverse announcement is here:
https://fediscience.org/@OJ_Astro/115982837486159819
And that concludes the update for this week. I will do another next Saturday.
#ACTDESHSCCollaboration #arXiv250511263v2 #arXiv250721459v3 #arXiv250813296v4 #arXiv250913152v2 #AstridSimulations #AstrophysicsOfGalaxies #CosmologyAndNonGalacticAstrophysics #DiamondOpenAccess #DiamondOpenAccessPublishing #DIPLODOCUS #galaxyClusters #galaxyFormation #HanburyBrownAndTwiss #HighEnergyAstrophysicalPhenomena #InstrumentationAndMethodsForAstrophysics #JWST #largeScaleStructureOfTheUniverse #MoMZ14 #OpenAccess #OpenAccessPublishing #OpenJournalOfAstrophysics #PlasmaPhysics #relativisticTransportEquations #starFormation #StellarKinematics #SunyaevZeDovichEffect #TheOpenJournalOfAstrophysics

#actdeshsccollaboration #arxiv250511263v2 #arxiv250721459v3 #arxiv250813296v4 #arxiv250913152v2 #astridsimulations
In the Dark @[email protected] · 2026-01-31 · 11:20 UTC

Weekly Update from the Open Journal of Astrophysics – 31/01/2026
It’s Saturday once more so time for another update of activity at the Open Journal of Astrophysics. Since the last update we have published a further three papers, bringing the number in Volume 9 (2026) to 18 and the total so far published by OJAp up to 466.
I will continue to include the posts made on our Mastodon account (on Fediscience) to encourage you to visit it. Mastodon is a really excellent service, and a more than adequate replacement for X/Twitter which nobody should be using; these announcement also show the DOI for each paper.
The first paper to report this week is “Probing Stellar Kinematics with the Time-Asymmetric Hanbury Brown and Twiss Effect” by Lucijana Stanic (University of Zurich, Switzerland) and 13 others based in Zurich, Lausanne and Geneva (all in Switzerland). This was published on Monday 26th January 2026 in the folder Instrumentation and Methods for Astrophysics. This research demonstrates that intensity interferometry can reveal internal stellar kinematics, providing a new way to observe stellar dynamics with high time resolution.
The overlay is here:

You can find the officially accepted version on arXiv here and the announcement on Fediverse here:
https://fediscience.org/@OJ_Astro/115961234375736584
The second paper is “DIPLODOCUS I: Framework for the evaluation of relativistic transport equations with continuous forcing and discrete particle interactions” by Christopher N Everett & Garret Cotter (University of Oxford, UK). This was published on Tuesday January 27th 2026 in the folder High-Energy Astrophysical Phenomena. DIPLODOCUS is a new framework for mesoscopic modelling of astrophysical systems, using an integral formulation of relativistic transport equations and a discretisation procedure for particle distributions.
The overlay for this one is here:

The official version of the paper can be found on arXiv here and the Fediverse announcement here:
https://fediscience.org/@OJ_Astro/115966199181415094
Next, also published on Tuesday January 27th but in the folder Cosmology and Nongalactic Astrophysics we have “The Atacama Cosmology Telescope: DR6 Sunyaev-Zel’dovich Selected Galaxy Clusters Catalog” by M. Aguena et al. (101 authors altogether), on behalf of the ACT-DES-HSC Collaboration. This article reports on the discovery of 10,040 galaxy clusters in the Atacama Cosmology Telescope data, including 1,180 clusters at high redshifts, using the Sunyaev-Zel’dovich effect.
The overlay is here:

The official version can be found on arXiv here and the Fediverse announcement is here:
https://fediscience.org/@OJ_Astro/115966458299870033
And finally for this week we have a paper published yesterday, Friday 30th January 2026, in the folder Astrophysics of Galaxies. This is the paper I blogged about yesterday: “A Cosmic Miracle: A Remarkably Luminous Galaxy at zspec = 14.44 Confirmed with JWST” by Rohan Naidu (MIT Kavli Institute) and an international cast of 45 others. This article reports on the discovery by the James Webb Space Telescope (JWST) of a bright galaxy, MoM-z14, located 280 million years post-Big Bang, that challenges models of galaxy formation and the star-formation history of early galaxies.
The overlay is here:

The accepted version can be found on arXiv here, and the fediverse announcement is here:
https://fediscience.org/@OJ_Astro/115982837486159819
And that concludes the update for this week. I will do another next Saturday.
#ACTDESHSCCollaboration #arXiv250511263v2 #arXiv250721459v3 #arXiv250813296v4 #arXiv250913152v2 #AstridSimulations #AstrophysicsOfGalaxies #CosmologyAndNonGalacticAstrophysics #DiamondOpenAccess #DiamondOpenAccessPublishing #DIPLODOCUS #galaxyClusters #galaxyFormation #HanburyBrownAndTwiss #HighEnergyAstrophysicalPhenomena #InstrumentationAndMethodsForAstrophysics #JWST #largeScaleStructureOfTheUniverse #MoMZ14 #OpenAccess #OpenAccessPublishing #OpenJournalOfAstrophysics #PlasmaPhysics #relativisticTransportEquations #starFormation #StellarKinematics #SunyaevZeDovichEffect #TheOpenJournalOfAstrophysics

#actdeshsccollaboration #arxiv250511263v2 #arxiv250721459v3 #arxiv250813296v4 #arxiv250913152v2 #astridsimulations
In the Dark @[email protected] · 2026-01-31 · 11:20 UTC

Weekly Update from the Open Journal of Astrophysics – 31/01/2026
It’s Saturday once more so time for another update of activity at the Open Journal of Astrophysics. Since the last update we have published a further three papers, bringing the number in Volume 9 (2026) to 18 and the total so far published by OJAp up to 466.
I will continue to include the posts made on our Mastodon account (on Fediscience) to encourage you to visit it. Mastodon is a really excellent service, and a more than adequate replacement for X/Twitter which nobody should be using; these announcement also show the DOI for each paper.
The first paper to report this week is “Probing Stellar Kinematics with the Time-Asymmetric Hanbury Brown and Twiss Effect” by Lucijana Stanic (University of Zurich, Switzerland) and 13 others based in Zurich, Lausanne and Geneva (all in Switzerland). This was published on Monday 26th January 2026 in the folder Instrumentation and Methods for Astrophysics. This research demonstrates that intensity interferometry can reveal internal stellar kinematics, providing a new way to observe stellar dynamics with high time resolution.
The overlay is here:

You can find the officially accepted version on arXiv here and the announcement on Fediverse here:
https://fediscience.org/@OJ_Astro/115961234375736584
The second paper is “DIPLODOCUS I: Framework for the evaluation of relativistic transport equations with continuous forcing and discrete particle interactions” by Christopher N Everett & Garret Cotter (University of Oxford, UK). This was published on Tuesday January 27th 2026 in the folder High-Energy Astrophysical Phenomena. DIPLODOCUS is a new framework for mesoscopic modelling of astrophysical systems, using an integral formulation of relativistic transport equations and a discretisation procedure for particle distributions.
The overlay for this one is here:

The official version of the paper can be found on arXiv here and the Fediverse announcement here:
https://fediscience.org/@OJ_Astro/115966199181415094
Next, also published on Tuesday January 27th but in the folder Cosmology and Nongalactic Astrophysics we have “The Atacama Cosmology Telescope: DR6 Sunyaev-Zel’dovich Selected Galaxy Clusters Catalog” by M. Aguena et al. (101 authors altogether), on behalf of the ACT-DES-HSC Collaboration. This article reports on the discovery of 10,040 galaxy clusters in the Atacama Cosmology Telescope data, including 1,180 clusters at high redshifts, using the Sunyaev-Zel’dovich effect.
The overlay is here:

The official version can be found on arXiv here and the Fediverse announcement is here:
https://fediscience.org/@OJ_Astro/115966458299870033
And finally for this week we have a paper published yesterday, Friday 30th January 2026, in the folder Astrophysics of Galaxies. This is the paper I blogged about yesterday: “A Cosmic Miracle: A Remarkably Luminous Galaxy at zspec = 14.44 Confirmed with JWST” by Rohan Naidu (MIT Kavli Institute) and an international cast of 45 others. This article reports on the discovery by the James Webb Space Telescope (JWST) of a bright galaxy, MoM-z14, located 280 million years post-Big Bang, that challenges models of galaxy formation and the star-formation history of early galaxies.
The overlay is here:

The accepted version can be found on arXiv here, and the fediverse announcement is here:
https://fediscience.org/@OJ_Astro/115982837486159819
And that concludes the update for this week. I will do another next Saturday.
#ACTDESHSCCollaboration #arXiv250511263v2 #arXiv250721459v3 #arXiv250813296v4 #arXiv250913152v2 #AstridSimulations #AstrophysicsOfGalaxies #CosmologyAndNonGalacticAstrophysics #DiamondOpenAccess #DiamondOpenAccessPublishing #DIPLODOCUS #galaxyClusters #galaxyFormation #HanburyBrownAndTwiss #HighEnergyAstrophysicalPhenomena #InstrumentationAndMethodsForAstrophysics #JWST #largeScaleStructureOfTheUniverse #MoMZ14 #OpenAccess #OpenAccessPublishing #OpenJournalOfAstrophysics #PlasmaPhysics #relativisticTransportEquations #starFormation #StellarKinematics #SunyaevZeDovichEffect #TheOpenJournalOfAstrophysics

#theopenjournalofastrophysics #sunyaevzedovicheffect #stellarkinematics #starformation #relativistictransportequations #plasmaphysics
In the Dark @[email protected] · 2026-01-31 · 11:20 UTC

Weekly Update from the Open Journal of Astrophysics – 31/01/2026
It’s Saturday once more so time for another update of activity at the Open Journal of Astrophysics. Since the last update we have published a further three papers, bringing the number in Volume 9 (2026) to 18 and the total so far published by OJAp up to 466.
I will continue to include the posts made on our Mastodon account (on Fediscience) to encourage you to visit it. Mastodon is a really excellent service, and a more than adequate replacement for X/Twitter which nobody should be using; these announcement also show the DOI for each paper.
The first paper to report this week is “Probing Stellar Kinematics with the Time-Asymmetric Hanbury Brown and Twiss Effect” by Lucijana Stanic (University of Zurich, Switzerland) and 13 others based in Zurich, Lausanne and Geneva (all in Switzerland). This was published on Monday 26th January 2026 in the folder Instrumentation and Methods for Astrophysics. This research demonstrates that intensity interferometry can reveal internal stellar kinematics, providing a new way to observe stellar dynamics with high time resolution.
The overlay is here:

You can find the officially accepted version on arXiv here and the announcement on Fediverse here:
https://fediscience.org/@OJ_Astro/115961234375736584
The second paper is “DIPLODOCUS I: Framework for the evaluation of relativistic transport equations with continuous forcing and discrete particle interactions” by Christopher N Everett & Garret Cotter (University of Oxford, UK). This was published on Tuesday January 27th 2026 in the folder High-Energy Astrophysical Phenomena. DIPLODOCUS is a new framework for mesoscopic modelling of astrophysical systems, using an integral formulation of relativistic transport equations and a discretisation procedure for particle distributions.
The overlay for this one is here:

The official version of the paper can be found on arXiv here and the Fediverse announcement here:
https://fediscience.org/@OJ_Astro/115966199181415094
Next, also published on Tuesday January 27th but in the folder Cosmology and Nongalactic Astrophysics we have “The Atacama Cosmology Telescope: DR6 Sunyaev-Zel’dovich Selected Galaxy Clusters Catalog” by M. Aguena et al. (101 authors altogether), on behalf of the ACT-DES-HSC Collaboration. This article reports on the discovery of 10,040 galaxy clusters in the Atacama Cosmology Telescope data, including 1,180 clusters at high redshifts, using the Sunyaev-Zel’dovich effect.
The overlay is here:

The official version can be found on arXiv here and the Fediverse announcement is here:
https://fediscience.org/@OJ_Astro/115966458299870033
And finally for this week we have a paper published yesterday, Friday 30th January 2026, in the folder Astrophysics of Galaxies. This is the paper I blogged about yesterday: “A Cosmic Miracle: A Remarkably Luminous Galaxy at zspec = 14.44 Confirmed with JWST” by Rohan Naidu (MIT Kavli Institute) and an international cast of 45 others. This article reports on the discovery by the James Webb Space Telescope (JWST) of a bright galaxy, MoM-z14, located 280 million years post-Big Bang, that challenges models of galaxy formation and the star-formation history of early galaxies.
The overlay is here:

The accepted version can be found on arXiv here, and the fediverse announcement is here:
https://fediscience.org/@OJ_Astro/115982837486159819
And that concludes the update for this week. I will do another next Saturday.
#ACTDESHSCCollaboration #arXiv250511263v2 #arXiv250721459v3 #arXiv250813296v4 #arXiv250913152v2 #AstridSimulations #AstrophysicsOfGalaxies #CosmologyAndNonGalacticAstrophysics #DiamondOpenAccess #DiamondOpenAccessPublishing #DIPLODOCUS #galaxyClusters #galaxyFormation #HanburyBrownAndTwiss #HighEnergyAstrophysicalPhenomena #InstrumentationAndMethodsForAstrophysics #JWST #largeScaleStructureOfTheUniverse #MoMZ14 #OpenAccess #OpenAccessPublishing #OpenJournalOfAstrophysics #PlasmaPhysics #relativisticTransportEquations #starFormation #StellarKinematics #SunyaevZeDovichEffect #TheOpenJournalOfAstrophysics

#actdeshsccollaboration #arxiv250511263v2 #arxiv250721459v3 #arxiv250813296v4 #arxiv250913152v2 #astridsimulations
In the Dark @[email protected] · 2026-01-24 · 11:46 UTC

Weekly Update from the Open Journal of Astrophysics – 24/01/2026
It’s Saturday once more so time for another update of activity at the Open Journal of Astrophysics. Since the last update we have published a further three papers, bringing the number in Volume 9 (2026) to 14 and the total so far published by OJAp up to 462. This week was slightly affected by a Federal holiday in the USA on January 19th; there were no arXiv announcements the following day.
I will continue to include the posts made on our Mastodon account (on Fediscience) to encourage you to visit it. Mastodon is a really excellent service, and a more than adequate replacement for X/Twitter which nobody should be using.
The first paper to report this week is “The Properties of Little Red Dot Galaxies in the ASTRID Simulation” by Patrick LaChance, Rupert A. C. Croft, Tiziana Di Matteo & Yihao Zhou (Carnegie Mellon U.), Fabio Pacucci (Harvard-Smithsonian CfA), Yueying Ni (U. Michigan Ann Arbor), Nianyi Chen (Princeton U.) and Simeon Bird (UC Riverside), all based in the USA. This paper was published on Monday 19th January 2026 in the folder Cosmology and Nongalactic Astrophysics; the study analyses mock observations of “Little Red Dot” galaxies created from the ASTRID simulation, having high stellar masses and containing massive black holes; not all features match real observations.
The overlay is here:

You can find the officially accepted version on arXiv here and the announcement on Fediverse here:
https://fediscience.org/@OJ_Astro/115921308789068125
The second paper is “Angular bispectrum of matter number counts in cosmic structures” by Thomas Montandon (U. Montpellier, France), Enea Di Dio (U. Genève, Switzerland), Cornelius Rampf (Ruđer Bošković Institute, Croatia) and Julian Adamek (U. Zürich, Switzerland). This was published on Wednesday January 21st, also in the folder Cosmology and Nongalactic Astrophysics. This paper presents thee first full-sky computation of the angular bispectrum in second-order perturbation theory, offering insights into the Universe’s initial conditions, gravity, and cosmological parameters. The results align well with simulations.
The overlay for this one is here:

The official version of the paper can be found on arXiv here and the Fediverse announcement here:
https://fediscience.org/@OJ_Astro/115932387870297108
Next, and last for this week, we have “The Kinematic Properties of TŻO Candidate HV 11417 with Gaia DR3” by Anna J. G. O’Grady (Carnegie Mellon University, USA). This was published on Wednesday 21st January 2026 in the folder Solar and Stellar Astrophysics. This work uses updated data to confirm that HV 11417, a potential Thorne-Żytkow Object, is probably part of the Small Magellanic Cloud and qualifies as a runaway star.
The overlay is here:

The official version can be found on arXiv here and the Fediverse announcement is here:
https://fediscience.org/@OJ_Astro/115932444483985982
That concludes the update for this week. I will do another next Saturday.
#angularBispectrum #arXiv250105422v3 #arXiv251123368v2 #AstridSimulations #AstrophysicsOfGalaxies #bispectrum #CosmologyAndNonGalacticAstrophysics #DiamondOpenAccess #DiamondOpenAccessPublishing #GaiaDR3 #largeScaleStructureOfTheUniverse #LittleRedDots #OpenAccess #OpenAccessPublishing #OpenJournalOfAstrophysics #SolarAndStellarAstrophysics #TheOpenJournalOfAstrophysics #ThorneŻytkowObjects

#angularbispectrum #arxiv250105422v3 #arxiv251123368v2 #astridsimulations #astrophysicsofgalaxies #bispectrum
In the Dark @[email protected] · 2026-01-24 · 11:46 UTC

Weekly Update from the Open Journal of Astrophysics – 24/01/2026
It’s Saturday once more so time for another update of activity at the Open Journal of Astrophysics. Since the last update we have published a further three papers, bringing the number in Volume 9 (2026) to 14 and the total so far published by OJAp up to 462. This week was slightly affected by a Federal holiday in the USA on January 19th; there were no arXiv announcements the following day.
I will continue to include the posts made on our Mastodon account (on Fediscience) to encourage you to visit it. Mastodon is a really excellent service, and a more than adequate replacement for X/Twitter which nobody should be using.
The first paper to report this week is “The Properties of Little Red Dot Galaxies in the ASTRID Simulation” by Patrick LaChance, Rupert A. C. Croft, Tiziana Di Matteo & Yihao Zhou (Carnegie Mellon U.), Fabio Pacucci (Harvard-Smithsonian CfA), Yueying Ni (U. Michigan Ann Arbor), Nianyi Chen (Princeton U.) and Simeon Bird (UC Riverside), all based in the USA. This paper was published on Monday 19th January 2026 in the folder Cosmology and Nongalactic Astrophysics; the study analyses mock observations of “Little Red Dot” galaxies created from the ASTRID simulation, having high stellar masses and containing massive black holes; not all features match real observations.
The overlay is here:

You can find the officially accepted version on arXiv here and the announcement on Fediverse here:
https://fediscience.org/@OJ_Astro/115921308789068125
The second paper is “Angular bispectrum of matter number counts in cosmic structures” by Thomas Montandon (U. Montpellier, France), Enea Di Dio (U. Genève, Switzerland), Cornelius Rampf (Ruđer Bošković Institute, Croatia) and Julian Adamek (U. Zürich, Switzerland). This was published on Wednesday January 21st, also in the folder Cosmology and Nongalactic Astrophysics. This paper presents thee first full-sky computation of the angular bispectrum in second-order perturbation theory, offering insights into the Universe’s initial conditions, gravity, and cosmological parameters. The results align well with simulations.
The overlay for this one is here:

The official version of the paper can be found on arXiv here and the Fediverse announcement here:
https://fediscience.org/@OJ_Astro/115932387870297108
Next, and last for this week, we have “The Kinematic Properties of TŻO Candidate HV 11417 with Gaia DR3” by Anna J. G. O’Grady (Carnegie Mellon University, USA). This was published on Wednesday 21st January 2026 in the folder Solar and Stellar Astrophysics. This work uses updated data to confirm that HV 11417, a potential Thorne-Żytkow Object, is probably part of the Small Magellanic Cloud and qualifies as a runaway star.
The overlay is here:

The official version can be found on arXiv here and the Fediverse announcement is here:
https://fediscience.org/@OJ_Astro/115932444483985982
That concludes the update for this week. I will do another next Saturday.
#angularBispectrum #arXiv250105422v3 #arXiv251123368v2 #AstridSimulations #AstrophysicsOfGalaxies #bispectrum #CosmologyAndNonGalacticAstrophysics #DiamondOpenAccess #DiamondOpenAccessPublishing #GaiaDR3 #largeScaleStructureOfTheUniverse #LittleRedDots #OpenAccess #OpenAccessPublishing #OpenJournalOfAstrophysics #SolarAndStellarAstrophysics #TheOpenJournalOfAstrophysics #ThorneŻytkowObjects

#thornezytkowobjects #theopenjournalofastrophysics #solarandstellarastrophysics #openjournalofastrophysics #openaccesspublishing #openaccess
In the Dark @[email protected] · 2026-01-17 · 12:15 UTC

Weekly Update from the Open Journal of Astrophysics – 17/01/2026
It’s Saturday once more so time for another update of activity at the Open Journal of Astrophysics. Since the last update we have published seven papers, bringing the number in Volume 9 (2026) to 11 and the total so far published by OJAp up to 459. This week has been quite busy; for only the second time in recorded history we published at least one paper each working day.
I will continue to include the announcements made on our Mastodon account (on Fediscience) to encourage you to visit it. Mastodon is a really excellent service, and a more than adequate replacement for X/Twitter which nobody should be using.
The first three papers this week were all published on Monday January 12th in the folder Astrophysics of Galaxies.
The first paper to report this week is “Rotational Kinematics in the Globular Cluster System of M31: Insights from Bayesian Inference” by Yuan (Cher) Li & Brendon J. Brewer (U. Auckland, New Zealand), Geraint F. Lewis (U. Sydney, Australia) and Dougal Mackey (independent researcher, Australia). This study uses Bayesian modelling to explore the kinematics of globular clusters in the Andromeda Galaxy, revealing distinct rotation patterns that suggest different subgroups were added at separate times.
The overlay is here:

You can find the officially accepted version on arXiv here and the announcement on Fediverse here:
https://fediscience.org/@OJ_Astro/115881522738421378
The second paper is “DESI Data Release 1: Stellar Catalogue” by Sergey Koposov (U. Edinburgh, UK) and an international cast of 67 other authors. This paper introduces and describes the stellar Value-Added Catalogue (VAC) based on DESI Data Release 1, providing measurements for over 4 million stars, including radial velocity, abundance, and stellar parameters.
The overlay for this one is here:

The official version of the paper can be found on arXiv here and the Fediverse announcement here:
https://fediscience.org/@OJ_Astro/115881586884465975
Next we have “On the origins of oxygen: ALMA and JWST characterise the multi-phase, metal-enriched, star-bursting medium within a ‘normal’ z>11 galaxy” by Joris Witstok (Cosmic Dawn Centre, Copenhagen, Denmark) and 37 others in locations dotted around the world. This paper presents new ALMA observations of the JADES-GS-z11-0 galaxy confirm the presence of the [O III] 88 µm line, suggesting it consists of two low-mass components undergoing star formation and enriched in metals.
The overlay is here:

The official version can be found on arXiv here and the Fediverse announcement is here:
https://fediscience.org/@OJ_Astro/115881659633273777
The fourth paper this week is also in the folder Astrophysics of Galaxies. but was published on Tuesday 13th January. It is entitled “Accelerated calibration of semi-analytic galaxy formation models” by Andrew Robertson and Andrew Benson (Carnegie Observatories, USA). This paper presents a faster calibration framework for galaxy formation models, using fewer simulations for each evaluation. However, the model shows discrepancies suggesting the model needs to be made more flexible.
The overlay is here:
You can find the officially accepted version on arXiv here and the Mastodon announcement here:
https://fediscience.org/@OJ_Astro/115887131054018297
Next one up, published on Wednesday 14th January in the folder Cosmology and Nongalactic Astrophysics, is “Constraints from CMB lensing tomography with projected bispectra” by Lea Harscouet & David Alonso (U. Oxford), UK), Andrina Nicola (U. Manchester, UK) and Anže Slosar (Brookhaven National Laboratory, USA). This study presents angular power spectra and bispectra of DESI luminous red galaxies, finding that the galaxy bispectrum can constrain the amplitude of matter fluctuations and the non-relativistic matter fraction. The overlay is here:
You can find the officially accepted paper on arXiv here and the Mastodon announcement here:
https://fediscience.org/@OJ_Astro/115893813149036197
The sixth paper this week is “Universal numerical convergence criteria for subhalo tidal evolution” by Barry T. Chiang & Frank C. van den Bosch (Yale U., USA) and Hsi-Yu Schive (National Taiwan University, Taiwan). This was published on Thursday 15th January in the folder Cosmology and Nongalactic Astrophysics; it presents an analysis of a simulation suite that addresses the ‘overmerging’ problem in cosmological simulations of dark matter subhalos, showing that up to 50% of halos in state-of-the art simulations are unresolved. The overlay is here:
The final accepted version of this paper can be found on arXiv here. The Mastodon announcement follows:
https://fediscience.org/@OJ_Astro/115898339098021093
Finally for this week we have “Detectability of dark matter subhalo impacts in Milky Way stellar streams” by Junyang Lu , Tongyan Lin & Mukul Sholapurkar (UCSD, USA) and Ana Bonaca (Carnegie Observatories, USA). This was published on Friday 16th January (i.e. yesterday) in the folder Astrophysics of Galaxies. The study develops a method to estimate the minimum detectable dark matter subhalo mass in stellar streams, ranking them by sensitivity and identifying promising lines for further research.
The overlay is here:
The officially accepted version can be found on arXiv here and the Fediverse announcement here:
https://fediscience.org/@OJ_Astro/115904083514716420
That concludes the update for this week. I will do another next Saturday.
#ALMA #arXiv250207781v3 #arXiv250514787v3 #arXiv250707968v2 #arXiv250722888v4 #arXiv250900143v2 #arXiv251026901v2 #arXiv260105380v2 #AstrophysicsOfGalaxies #BayesianMethods #CosmologyAndNonGalacticAstrophysics #DarkEnergySurvey #darkMatter #DES #DiamondOpenAccess #DiamondOpenAccessPublishing #galaxyFormation #JWST #M31 #MilkyWay #OpenAccess #OpenAccessPublishing #OpenJournalOfAstrophysics #Oxygen #semiAnalyticModels #subhalos #TheOpenJournalOfAstrophysics #Tomography #weakGravitationalLensing

#alma #arxiv250207781v3 #arxiv250514787v3 #arxiv250707968v2 #arxiv250722888v4 #arxiv250900143v2
In the Dark @[email protected] · 2026-01-17 · 12:15 UTC

Weekly Update from the Open Journal of Astrophysics – 17/01/2026
It’s Saturday once more so time for another update of activity at the Open Journal of Astrophysics. Since the last update we have published seven papers, bringing the number in Volume 9 (2026) to 11 and the total so far published by OJAp up to 459. This week has been quite busy; for only the second time in recorded history we published at least one paper each working day.
I will continue to include the announcements made on our Mastodon account (on Fediscience) to encourage you to visit it. Mastodon is a really excellent service, and a more than adequate replacement for X/Twitter which nobody should be using.
The first three papers this week were all published on Monday January 12th in the folder Astrophysics of Galaxies.
The first paper to report this week is “Rotational Kinematics in the Globular Cluster System of M31: Insights from Bayesian Inference” by Yuan (Cher) Li & Brendon J. Brewer (U. Auckland, New Zealand), Geraint F. Lewis (U. Sydney, Australia) and Dougal Mackey (independent researcher, Australia). This study uses Bayesian modelling to explore the kinematics of globular clusters in the Andromeda Galaxy, revealing distinct rotation patterns that suggest different subgroups were added at separate times.
The overlay is here:

You can find the officially accepted version on arXiv here and the announcement on Fediverse here:
https://fediscience.org/@OJ_Astro/115881522738421378
The second paper is “DESI Data Release 1: Stellar Catalogue” by Sergey Koposov (U. Edinburgh, UK) and an international cast of 67 other authors. This paper introduces and describes the stellar Value-Added Catalogue (VAC) based on DESI Data Release 1, providing measurements for over 4 million stars, including radial velocity, abundance, and stellar parameters.
The overlay for this one is here:

The official version of the paper can be found on arXiv here and the Fediverse announcement here:
https://fediscience.org/@OJ_Astro/115881586884465975
Next we have “On the origins of oxygen: ALMA and JWST characterise the multi-phase, metal-enriched, star-bursting medium within a ‘normal’ z>11 galaxy” by Joris Witstok (Cosmic Dawn Centre, Copenhagen, Denmark) and 37 others in locations dotted around the world. This paper presents new ALMA observations of the JADES-GS-z11-0 galaxy confirm the presence of the [O III] 88 µm line, suggesting it consists of two low-mass components undergoing star formation and enriched in metals.
The overlay is here:

The official version can be found on arXiv here and the Fediverse announcement is here:
https://fediscience.org/@OJ_Astro/115881659633273777
The fourth paper this week is also in the folder Astrophysics of Galaxies. but was published on Tuesday 13th January. It is entitled “Accelerated calibration of semi-analytic galaxy formation models” by Andrew Robertson and Andrew Benson (Carnegie Observatories, USA). This paper presents a faster calibration framework for galaxy formation models, using fewer simulations for each evaluation. However, the model shows discrepancies suggesting the model needs to be made more flexible.
The overlay is here:
You can find the officially accepted version on arXiv here and the Mastodon announcement here:
https://fediscience.org/@OJ_Astro/115887131054018297
Next one up, published on Wednesday 14th January in the folder Cosmology and Nongalactic Astrophysics, is “Constraints from CMB lensing tomography with projected bispectra” by Lea Harscouet & David Alonso (U. Oxford), UK), Andrina Nicola (U. Manchester, UK) and Anže Slosar (Brookhaven National Laboratory, USA). This study presents angular power spectra and bispectra of DESI luminous red galaxies, finding that the galaxy bispectrum can constrain the amplitude of matter fluctuations and the non-relativistic matter fraction. The overlay is here:
You can find the officially accepted paper on arXiv here and the Mastodon announcement here:
https://fediscience.org/@OJ_Astro/115893813149036197
The sixth paper this week is “Universal numerical convergence criteria for subhalo tidal evolution” by Barry T. Chiang & Frank C. van den Bosch (Yale U., USA) and Hsi-Yu Schive (National Taiwan University, Taiwan). This was published on Thursday 15th January in the folder Cosmology and Nongalactic Astrophysics; it presents an analysis of a simulation suite that addresses the ‘overmerging’ problem in cosmological simulations of dark matter subhalos, showing that up to 50% of halos in state-of-the art simulations are unresolved. The overlay is here:
The final accepted version of this paper can be found on arXiv here. The Mastodon announcement follows:
https://fediscience.org/@OJ_Astro/115898339098021093
Finally for this week we have “Detectability of dark matter subhalo impacts in Milky Way stellar streams” by Junyang Lu , Tongyan Lin & Mukul Sholapurkar (UCSD, USA) and Ana Bonaca (Carnegie Observatories, USA). This was published on Friday 16th January (i.e. yesterday) in the folder Astrophysics of Galaxies. The study develops a method to estimate the minimum detectable dark matter subhalo mass in stellar streams, ranking them by sensitivity and identifying promising lines for further research.
The overlay is here:
The officially accepted version can be found on arXiv here and the Fediverse announcement here:
https://fediscience.org/@OJ_Astro/115904083514716420
That concludes the update for this week. I will do another next Saturday.
#ALMA #arXiv250207781v3 #arXiv250514787v3 #arXiv250707968v2 #arXiv250722888v4 #arXiv250900143v2 #arXiv251026901v2 #arXiv260105380v2 #AstrophysicsOfGalaxies #BayesianMethods #CosmologyAndNonGalacticAstrophysics #DarkEnergySurvey #darkMatter #DES #DiamondOpenAccess #DiamondOpenAccessPublishing #galaxyFormation #JWST #M31 #MilkyWay #OpenAccess #OpenAccessPublishing #OpenJournalOfAstrophysics #Oxygen #semiAnalyticModels #subhalos #TheOpenJournalOfAstrophysics #Tomography #weakGravitationalLensing

#weakgravitationallensing #tomography #theopenjournalofastrophysics #subhalos #semianalyticmodels #oxygen
In the Dark @[email protected] · 2026-01-10 · 10:20 UTC

Weekly Update from the Open Journal of Astrophysics – 10/01/2026
Welcome to the first proper update for 2026 from the Open Journal of Astrophysics. The New Year brings us to Volume 9. In many countries, especially in Europe, Christmas is celebrated on January 6th so this week was also affected by the holiday season. Nevertheless, since the last update we have published four papers, bringing the number in Volume 9 (2026) to 4 and the total so far published by OJAp up to 452.
The first paper this week (and of course the first of 2026) is “A targeted, parallax-based search for Planet Nine” by Hector Socas-Navarro and Ignacio Trujillo (both of the Instituto de Astrofísica de Canaria, Spain). This article describes a targeted search for the hypothesized Planet Nine in the outer solar system, using parallax position shifts. No credible candidates were found within the observed field. It was published on Tuesday January 6th in the folder Earth and Planetary Astrophysics. The overlay is here:
You can find the officially accepted version on arXiv here and the announcement on Fediverse here:
https://fediscience.org/@OJ_Astro/115847068676034973
The second paper is “Going beyond S8: fast inference of the matter power spectrum from weak-lensing surveys” by Cyrille Doux (Université Grenoble Alpes, France) and Tanvi Karwal (U. Chicago, USA). This was published on Wednesday January 7th in the folder Cosmology and Nongalactic Astrophysics and it presents a new framework to extract the scale-dependent matter power spectrum from cosmic shear and CMB lensing measurements, revealing a consistent suppression in the matter power spectrum in galaxy-lensing. The overlay is here:

The official version of the paper can be found on arXiv here and the Fediverse announcement here:
https://fediscience.org/@OJ_Astro/115853112748106265
Next we have “Constraining the Stellar-to-Halo Mass Relation with Galaxy Clustering and Weak Lensing from DES Year 3 Data” which is led by G. Zacharegkas et al. (Argonne National Laboratory, USA) and has 102 other authors too numerous to list by name from many institutions around the world again too numerous to list by name. It presents a framework to analyze the relationship between a galaxy’s stellar mass and its dark matter halo mass, using data from the Dark Energy Survey. The findings align with previous results. This paper was published on Thursday January 8th in the folder Astrophysics of Galaxies. The overlay is here:
The official version can be found on arXiv here and the Fediverse announcement is here:
https://fediscience.org/@OJ_Astro/115858972601709198
Finally for this week we have “Distance measurements from the internal dynamics of globular clusters: Application to the Sombrero galaxy (M 104)” by Katja Fahrion (University of Vienna, Austria) and 9 others based in Spain, Australia, UK, USA, Brazil, Germany and Switzerland. This was published on Friday 9th January (yesterday) in the folder Astrophysics of Galaxies. This study uses the globular cluster velocity dispersion method to measure the distance to the Sombrero galaxy, finding it to be approximately 9.0 Mpc away. The overlay is here:
The officially accepted version can be found on arXiv here and the Fediverse announcement here:
https://fediscience.org/@OJ_Astro/115864438724623861
That concludes the update for this week. I will do another next Saturday.
#arXiv250405473v2 #arXiv250616434v3 #arXiv250622367v3 #AstrophysicsOfGalaxies #CosmologyAndNonGalacticAstrophysics #DarkEnergySurvey #DES #DiamondOpenAccess #DiamondOpenAccessPublishing #EarthAndPlanetaryAstrophysics #galaxyClustering #galaxyHalo #OpenAccess #OpenAccessPublishing #OpenJournalOfAstrophysics #Planet9 #PowerSpectrum #StellarMass #TheOpenJournalOfAstrophysics #weakGravitationalLensing

#arxiv250405473v2 #arxiv250616434v3 #arxiv250622367v3 #astrophysicsofgalaxies #cosmologyandnongalacticastrophysics #darkenergysurvey
In the Dark @[email protected] · 2026-01-10 · 10:20 UTC

Weekly Update from the Open Journal of Astrophysics – 10/01/2026
Welcome to the first proper update for 2026 from the Open Journal of Astrophysics. The New Year brings us to Volume 9. In many countries, especially in Europe, Christmas is celebrated on January 6th so this week was also affected by the holiday season. Nevertheless, since the last update we have published four papers, bringing the number in Volume 9 (2026) to 4 and the total so far published by OJAp up to 452.
The first paper this week (and of course the first of 2026) is “A targeted, parallax-based search for Planet Nine” by Hector Socas-Navarro and Ignacio Trujillo (both of the Instituto de Astrofísica de Canaria, Spain). This article describes a targeted search for the hypothesized Planet Nine in the outer solar system, using parallax position shifts. No credible candidates were found within the observed field. It was published on Tuesday January 6th in the folder Earth and Planetary Astrophysics. The overlay is here:
You can find the officially accepted version on arXiv here and the announcement on Fediverse here:
https://fediscience.org/@OJ_Astro/115847068676034973
The second paper is “Going beyond S8: fast inference of the matter power spectrum from weak-lensing surveys” by Cyrille Doux (Université Grenoble Alpes, France) and Tanvi Karwal (U. Chicago, USA). This was published on Wednesday January 7th in the folder Cosmology and Nongalactic Astrophysics and it presents a new framework to extract the scale-dependent matter power spectrum from cosmic shear and CMB lensing measurements, revealing a consistent suppression in the matter power spectrum in galaxy-lensing. The overlay is here:

The official version of the paper can be found on arXiv here and the Fediverse announcement here:
https://fediscience.org/@OJ_Astro/115853112748106265
Next we have “Constraining the Stellar-to-Halo Mass Relation with Galaxy Clustering and Weak Lensing from DES Year 3 Data” which is led by G. Zacharegkas et al. (Argonne National Laboratory, USA) and has 102 other authors too numerous to list by name from many institutions around the world again too numerous to list by name. It presents a framework to analyze the relationship between a galaxy’s stellar mass and its dark matter halo mass, using data from the Dark Energy Survey. The findings align with previous results. This paper was published on Thursday January 8th in the folder Astrophysics of Galaxies. The overlay is here:
The official version can be found on arXiv here and the Fediverse announcement is here:
https://fediscience.org/@OJ_Astro/115858972601709198
Finally for this week we have “Distance measurements from the internal dynamics of globular clusters: Application to the Sombrero galaxy (M 104)” by Katja Fahrion (University of Vienna, Austria) and 9 others based in Spain, Australia, UK, USA, Brazil, Germany and Switzerland. This was published on Friday 9th January (yesterday) in the folder Astrophysics of Galaxies. This study uses the globular cluster velocity dispersion method to measure the distance to the Sombrero galaxy, finding it to be approximately 9.0 Mpc away. The overlay is here:
The officially accepted version can be found on arXiv here and the Fediverse announcement here:
https://fediscience.org/@OJ_Astro/115864438724623861
That concludes the update for this week. I will do another next Saturday.
#arXiv250405473v2 #arXiv250616434v3 #arXiv250622367v3 #AstrophysicsOfGalaxies #CosmologyAndNonGalacticAstrophysics #DarkEnergySurvey #DES #DiamondOpenAccess #DiamondOpenAccessPublishing #EarthAndPlanetaryAstrophysics #galaxyClustering #galaxyHalo #OpenAccess #OpenAccessPublishing #OpenJournalOfAstrophysics #Planet9 #PowerSpectrum #StellarMass #TheOpenJournalOfAstrophysics #weakGravitationalLensing

#arxiv250405473v2 #arxiv250616434v3 #arxiv250622367v3 #astrophysicsofgalaxies #cosmologyandnongalacticastrophysics #darkenergysurvey
In the Dark @[email protected] · 2026-01-10 · 10:20 UTC

Weekly Update from the Open Journal of Astrophysics – 10/01/2026
Welcome to the first proper update for 2026 from the Open Journal of Astrophysics. The New Year brings us to Volume 9. In many countries, especially in Europe, Christmas is celebrated on January 6th so this week was also affected by the holiday season. Nevertheless, since the last update we have published four papers, bringing the number in Volume 9 (2026) to 4 and the total so far published by OJAp up to 452.
The first paper this week (and of course the first of 2026) is “A targeted, parallax-based search for Planet Nine” by Hector Socas-Navarro and Ignacio Trujillo (both of the Instituto de Astrofísica de Canaria, Spain). This article describes a targeted search for the hypothesized Planet Nine in the outer solar system, using parallax position shifts. No credible candidates were found within the observed field. It was published on Tuesday January 6th in the folder Earth and Planetary Astrophysics. The overlay is here:
You can find the officially accepted version on arXiv here and the announcement on Fediverse here:
https://fediscience.org/@OJ_Astro/115847068676034973
The second paper is “Going beyond S8: fast inference of the matter power spectrum from weak-lensing surveys” by Cyrille Doux (Université Grenoble Alpes, France) and Tanvi Karwal (U. Chicago, USA). This was published on Wednesday January 7th in the folder Cosmology and Nongalactic Astrophysics and it presents a new framework to extract the scale-dependent matter power spectrum from cosmic shear and CMB lensing measurements, revealing a consistent suppression in the matter power spectrum in galaxy-lensing. The overlay is here:

The official version of the paper can be found on arXiv here and the Fediverse announcement here:
https://fediscience.org/@OJ_Astro/115853112748106265
Next we have “Constraining the Stellar-to-Halo Mass Relation with Galaxy Clustering and Weak Lensing from DES Year 3 Data” which is led by G. Zacharegkas et al. (Argonne National Laboratory, USA) and has 102 other authors too numerous to list by name from many institutions around the world again too numerous to list by name. It presents a framework to analyze the relationship between a galaxy’s stellar mass and its dark matter halo mass, using data from the Dark Energy Survey. The findings align with previous results. This paper was published on Thursday January 8th in the folder Astrophysics of Galaxies. The overlay is here:
The official version can be found on arXiv here and the Fediverse announcement is here:
https://fediscience.org/@OJ_Astro/115858972601709198
Finally for this week we have “Distance measurements from the internal dynamics of globular clusters: Application to the Sombrero galaxy (M 104)” by Katja Fahrion (University of Vienna, Austria) and 9 others based in Spain, Australia, UK, USA, Brazil, Germany and Switzerland. This was published on Friday 9th January (yesterday) in the folder Astrophysics of Galaxies. This study uses the globular cluster velocity dispersion method to measure the distance to the Sombrero galaxy, finding it to be approximately 9.0 Mpc away. The overlay is here:
The officially accepted version can be found on arXiv here and the Fediverse announcement here:
https://fediscience.org/@OJ_Astro/115864438724623861
That concludes the update for this week. I will do another next Saturday.
#arXiv250405473v2 #arXiv250616434v3 #arXiv250622367v3 #AstrophysicsOfGalaxies #CosmologyAndNonGalacticAstrophysics #DarkEnergySurvey #DES #DiamondOpenAccess #DiamondOpenAccessPublishing #EarthAndPlanetaryAstrophysics #galaxyClustering #galaxyHalo #OpenAccess #OpenAccessPublishing #OpenJournalOfAstrophysics #Planet9 #PowerSpectrum #StellarMass #TheOpenJournalOfAstrophysics #weakGravitationalLensing

#weakgravitationallensing #theopenjournalofastrophysics #stellarmass #powerspectrum #planet9 #openjournalofastrophysics
In the Dark @[email protected] · 2026-01-10 · 10:20 UTC

Weekly Update from the Open Journal of Astrophysics – 10/01/2026
Welcome to the first proper update for 2026 from the Open Journal of Astrophysics. The New Year brings us to Volume 9. In many countries, especially in Europe, Christmas is celebrated on January 6th so this week was also affected by the holiday season. Nevertheless, since the last update we have published four papers, bringing the number in Volume 9 (2026) to 4 and the total so far published by OJAp up to 452.
The first paper this week (and of course the first of 2026) is “A targeted, parallax-based search for Planet Nine” by Hector Socas-Navarro and Ignacio Trujillo (both of the Instituto de Astrofísica de Canaria, Spain). This article describes a targeted search for the hypothesized Planet Nine in the outer solar system, using parallax position shifts. No credible candidates were found within the observed field. It was published on Tuesday January 6th in the folder Earth and Planetary Astrophysics. The overlay is here:
You can find the officially accepted version on arXiv here and the announcement on Fediverse here:
https://fediscience.org/@OJ_Astro/115847068676034973
The second paper is “Going beyond S8: fast inference of the matter power spectrum from weak-lensing surveys” by Cyrille Doux (Université Grenoble Alpes, France) and Tanvi Karwal (U. Chicago, USA). This was published on Wednesday January 7th in the folder Cosmology and Nongalactic Astrophysics and it presents a new framework to extract the scale-dependent matter power spectrum from cosmic shear and CMB lensing measurements, revealing a consistent suppression in the matter power spectrum in galaxy-lensing. The overlay is here:

The official version of the paper can be found on arXiv here and the Fediverse announcement here:
https://fediscience.org/@OJ_Astro/115853112748106265
Next we have “Constraining the Stellar-to-Halo Mass Relation with Galaxy Clustering and Weak Lensing from DES Year 3 Data” which is led by G. Zacharegkas et al. (Argonne National Laboratory, USA) and has 102 other authors too numerous to list by name from many institutions around the world again too numerous to list by name. It presents a framework to analyze the relationship between a galaxy’s stellar mass and its dark matter halo mass, using data from the Dark Energy Survey. The findings align with previous results. This paper was published on Thursday January 8th in the folder Astrophysics of Galaxies. The overlay is here:
The official version can be found on arXiv here and the Fediverse announcement is here:
https://fediscience.org/@OJ_Astro/115858972601709198
Finally for this week we have “Distance measurements from the internal dynamics of globular clusters: Application to the Sombrero galaxy (M 104)” by Katja Fahrion (University of Vienna, Austria) and 9 others based in Spain, Australia, UK, USA, Brazil, Germany and Switzerland. This was published on Friday 9th January (yesterday) in the folder Astrophysics of Galaxies. This study uses the globular cluster velocity dispersion method to measure the distance to the Sombrero galaxy, finding it to be approximately 9.0 Mpc away. The overlay is here:
The officially accepted version can be found on arXiv here and the Fediverse announcement here:
https://fediscience.org/@OJ_Astro/115864438724623861
That concludes the update for this week. I will do another next Saturday.
#arXiv250405473v2 #arXiv250616434v3 #arXiv250622367v3 #AstrophysicsOfGalaxies #CosmologyAndNonGalacticAstrophysics #DarkEnergySurvey #DES #DiamondOpenAccess #DiamondOpenAccessPublishing #EarthAndPlanetaryAstrophysics #galaxyClustering #galaxyHalo #OpenAccess #OpenAccessPublishing #OpenJournalOfAstrophysics #Planet9 #PowerSpectrum #StellarMass #TheOpenJournalOfAstrophysics #weakGravitationalLensing

#arxiv250405473v2 #arxiv250616434v3 #arxiv250622367v3 #astrophysicsofgalaxies #cosmologyandnongalacticastrophysics #darkenergysurvey
In the Dark @[email protected] · 2026-01-03 · 11:47 UTC
Not a Weekly Update from the Open Journal of Astrophysics – 03/01/2026
Not entirely surprisingly, we have not published any papers at the Open Journal of Astrophysics since the last update on 27th December 2025. Of course many authors have been on holiday and there were no arXiv announcements on either Tuesday 30th December or Thursday 1st January anyway. Although we had a few papers accepted before the break, none of them appeared this past week. I dare say some of them will appear next week. We will be starting Volume 9 in 2026, as soon as there is a paper to publish in it.
There bing no papers to report, instead of doing one of the regular Saturday updates, I’d like to take the opportunity afforded by this pause to thank everyone who has supported the Open Journal of Astrophysics this year – Editors, Reviewers, Authors and the excellent Library staff at Maynooth University Library – and who have made it such a bumper year. I’d also like to repeat a call for volunteers to join the Editorial Board. In 2023 we published just 50 papers, and in 2025 the figure was 213, so we have more than quadrupled in two years. How many will we publish in 2026?
Here is a graphic showing the number of new papers submitted to the Open Journal of Astrophysics since January 2020:
As the legend explains, this is only the first submission of a paper – resubmissions of revised papers are not included. You can see the thicket is getting denser all the time!
The increasing number of articles is of course very welcome indeed, but it is increasing the load on our Editorial Board many of whom are also very busy with other things. We have expanded the Board recently, but we’re always for volunteers to join the team, in any area of astrophysics. As a reminder, here are the areas we cover, corresponding to the sections of astro-ph on the arXiv:
- astro-ph.GA – Astrophysics of Galaxies. Phenomena pertaining to galaxies or the Milky Way. Star clusters, HII regions and planetary nebulae, the interstellar medium, atomic and molecular clouds, dust. Stellar populations. Galactic structure, formation, dynamics. Galactic nuclei, bulges, disks, halo. Active Galactic Nuclei, supermassive black holes, quasars. Gravitational lens systems. The Milky Way and its contents
- astro-ph.CO – Cosmology and Nongalactic Astrophysics. Phenomenology of early universe, cosmic microwave background, cosmological parameters, primordial element abundances, extragalactic distance scale, large-scale structure of the universe. Groups, superclusters, voids, intergalactic medium. Particle astrophysics: dark energy, dark matter, baryogenesis, leptogenesis, inflationary models, reheating, monopoles, WIMPs, cosmic strings, primordial black holes, cosmological gravitational radiation
- astro-ph.EP – Earth and Planetary Astrophysics. Interplanetary medium, planetary physics, planetary astrobiology, extrasolar planets, comets, asteroids, meteorites. Structure and formation of the solar system
- astro-ph.HE – High Energy Astrophysical Phenomena. Cosmic ray production, acceleration, propagation, detection. Gamma ray astronomy and bursts, X-rays, charged particles, supernovae and other explosive phenomena, stellar remnants and accretion systems, jets, microquasars, neutron stars, pulsars, black holes
- astro-ph.IM – Instrumentation and Methods for Astrophysics. Detector and telescope design, experiment proposals. Laboratory Astrophysics. Methods for data analysis, statistical methods. Software, database design
- astro-ph.SR – Solar and Stellar Astrophysics. White dwarfs, brown dwarfs, cataclysmic variables. Star formation and protostellar systems, stellar astrobiology, binary and multiple systems of stars, stellar evolution and structure, coronas. Central stars of planetary nebulae. Helioseismology, solar neutrinos, production and detection of gravitational radiation from stellar systems.
We are looking for experienced scientists in any of these areas, and it would indeed be useful to have people who can cover a range of subjects (as some of our existing editors do). Since we don’t charge authors or readers we can not offer payment to Editors but it is nevertheless a way of providing a service to the community. If you’re interested, please get in touch either through the Open Journal website here, through a message on Mastodon here or BlueSky here.
#DiamondOpenAccess #DiamondOpenAccessPublishing #EditorialBoard #OpenJournalOfAstrophysics #TheOpenJournalOfAstrophysics
#diamondopenaccess #diamondopenaccesspublishing #editorialboard #openjournalofastrophysics #theopenjournalofastrophysics
In the Dark @[email protected] · 2026-01-03 · 11:47 UTC
Not a Weekly Update from the Open Journal of Astrophysics – 03/01/2026
Not entirely surprisingly, we have not published any papers at the Open Journal of Astrophysics since the last update on 27th December 2025. Of course many authors have been on holiday and there were no arXiv announcements on either Tuesday 30th December or Thursday 1st January anyway. Although we had a few papers accepted before the break, none of them appeared this past week. I dare say some of them will appear next week. We will be starting Volume 9 in 2026, as soon as there is a paper to publish in it.
There bing no papers to report, instead of doing one of the regular Saturday updates, I’d like to take the opportunity afforded by this pause to thank everyone who has supported the Open Journal of Astrophysics this year – Editors, Reviewers, Authors and the excellent Library staff at Maynooth University Library – and who have made it such a bumper year. I’d also like to repeat a call for volunteers to join the Editorial Board. In 2023 we published just 50 papers, and in 2025 the figure was 213, so we have more than quadrupled in two years. How many will we publish in 2026?
Here is a graphic showing the number of new papers submitted to the Open Journal of Astrophysics since January 2020:
As the legend explains, this is only the first submission of a paper – resubmissions of revised papers are not included. You can see the thicket is getting denser all the time!
The increasing number of articles is of course very welcome indeed, but it is increasing the load on our Editorial Board many of whom are also very busy with other things. We have expanded the Board recently, but we’re always for volunteers to join the team, in any area of astrophysics. As a reminder, here are the areas we cover, corresponding to the sections of astro-ph on the arXiv:
- astro-ph.GA – Astrophysics of Galaxies. Phenomena pertaining to galaxies or the Milky Way. Star clusters, HII regions and planetary nebulae, the interstellar medium, atomic and molecular clouds, dust. Stellar populations. Galactic structure, formation, dynamics. Galactic nuclei, bulges, disks, halo. Active Galactic Nuclei, supermassive black holes, quasars. Gravitational lens systems. The Milky Way and its contents
- astro-ph.CO – Cosmology and Nongalactic Astrophysics. Phenomenology of early universe, cosmic microwave background, cosmological parameters, primordial element abundances, extragalactic distance scale, large-scale structure of the universe. Groups, superclusters, voids, intergalactic medium. Particle astrophysics: dark energy, dark matter, baryogenesis, leptogenesis, inflationary models, reheating, monopoles, WIMPs, cosmic strings, primordial black holes, cosmological gravitational radiation
- astro-ph.EP – Earth and Planetary Astrophysics. Interplanetary medium, planetary physics, planetary astrobiology, extrasolar planets, comets, asteroids, meteorites. Structure and formation of the solar system
- astro-ph.HE – High Energy Astrophysical Phenomena. Cosmic ray production, acceleration, propagation, detection. Gamma ray astronomy and bursts, X-rays, charged particles, supernovae and other explosive phenomena, stellar remnants and accretion systems, jets, microquasars, neutron stars, pulsars, black holes
- astro-ph.IM – Instrumentation and Methods for Astrophysics. Detector and telescope design, experiment proposals. Laboratory Astrophysics. Methods for data analysis, statistical methods. Software, database design
- astro-ph.SR – Solar and Stellar Astrophysics. White dwarfs, brown dwarfs, cataclysmic variables. Star formation and protostellar systems, stellar astrobiology, binary and multiple systems of stars, stellar evolution and structure, coronas. Central stars of planetary nebulae. Helioseismology, solar neutrinos, production and detection of gravitational radiation from stellar systems.
We are looking for experienced scientists in any of these areas, and it would indeed be useful to have people who can cover a range of subjects (as some of our existing editors do). Since we don’t charge authors or readers we can not offer payment to Editors but it is nevertheless a way of providing a service to the community. If you’re interested, please get in touch either through the Open Journal website here, through a message on Mastodon here or BlueSky here.
#DiamondOpenAccess #DiamondOpenAccessPublishing #EditorialBoard #OpenJournalOfAstrophysics #TheOpenJournalOfAstrophysics
#theopenjournalofastrophysics #openjournalofastrophysics #editorialboard #diamondopenaccesspublishing #diamondopenaccess
In the Dark @[email protected] · 2025-12-27 · 10:37 UTC

Weekly Update from the Open Journal of Astrophysics – 27/12/2025
I wasn’t planning to do another update this week but I thought it would be best to complete the publications for 2025 at the Open Journal of Astrophysics, so that I don’t have to do a bigger update in the new year, and I have a bit of time this morning, so here we go.
Since the last update we have published four papers which brings the number in Volume 8 (2025) up to 201. Adding the 12 papers in the Supplement, this brings the final total for the year up to 213, and the total so far published by OJAp up to 448. In 2023 we published just 50 papers, so we have more than quadrupled in two years.
The first paper this week is “Transverse Velocities in Real-Time Cosmology: Position Drift in Relativistic N-Body Simulations” by Alexander Oestreicher (University of Southern Denmark), Chris Clarkson (QMUL, UK), Julian Adamek (Universität Zürich, CH) and Sofie Marie Koksbang (U. Southern Denmark). This study uses a general relativistic N-body simulation code to explore how cosmological structures affect position drift measurements, a new method for studying cosmic structure formation and velocity fields. This was published on Tuesday 23rd December 2025 in the folder Cosmology and Nongalactic Astrophysics.
The overlay is here:

You can find the officially accepted version on arXiv here and this is the announcement on Mastodon (Fediscience):

Open Journal of Astrophysics
@[email protected]

New Publication at the Open Journal of Astrophysics: "Transverse Velocities in Real-Time Cosmology: Position Drift in Relativistic N-Body Simulations" by Alexander Oestreicher (University of Southern Denmark), Chris Clarkson (QMUL, UK), Julian Adamek (Universität Zürich, CH) and Sofie Marie Koksbang (U. Southern Denmark)
https://doi.org/10.33232/001c.154744
December 23, 2025, 9:33 am 1 boosts 0 favorites

The second paper of the week is “On the statistical convergence of N-body simulations of the Solar System” by Hanno Rein, Garett Brown and Mei Kanda (U. Toronto, Canada). This study presents numerical experiments to determine the minimum timestep for long-term simulations of the Solar System, finding that timesteps up to 32 days yield physical results. It was published on Tuesday December 23rd in the folder Earth and Planetary Astrophysics.
The overlay is here:

You can find the official version of this one on arXiv here. The federated announcement on Mastodon is here:

Open Journal of Astrophysics
@[email protected]

New Publication at the Open Journal of Astrophysics: "On the statistical convergence of N-body simulations of the Solar System" by Hanno Rein, Garett Brown and Mei Kanda (U. Toronto, Canada)
https://doi.org/10.33232/001c.154745
December 23, 2025, 9:50 am 6 boosts 9 favorites

Next, published on 24th December 2025 in the folder High-Energy Astrophysical Phenomena, we have “The explosion jets of the core-collapse supernova remnant Circinus X-1” by Noam Soker and Muhammad Akashi (Technion, Haifa, Israel). This paper suggests that the rings in the Circinus X-1 supernova remnant resulted from jet-driven explosions, supporting the jittering-jets explosion mechanism theory for core collapse supernovae.
The overlay is here:
The officially accepted paper can be found on arXiv here and the announcement on Mastodon is here

Open Journal of Astrophysics
@[email protected]

New Publication at the Open Journal of Astrophysics: "The explosion jets of the core-collapse supernova remnant Circinus X-1" by Noam Soker and Muhammad Akashi (Technion, Haifa, Israel)
https://doi.org/10.33232/001c.154770
December 24, 2025, 9:15 am 2 boosts 1 favorites

Finally for 2025 we have “Quantifying the Fermi paradox via passive SETI: a general framework” by Matthew Civiletti (City University of New York, USA). This was published on Wednesday 24th December in the folder Instrumentation and Methods for Astrophysics. The author uses SETI observations and the Drake Equation to calculate the probability of detecting at least one extraterrestrial signal, highlighting the model’s limitations and potential improvements. The overlay is here:
The officially accepted version can be found on arXiv here and the Mastodon announcement here:

Open Journal of Astrophysics
@[email protected]

New Publication at the Open Journal of Astrophysics: "Quantifying the Fermi paradox via passive SETI: a general framework" by Matthew Civiletti (City University of New York, USA)
https://doi.org/10.33232/001c.154771
December 24, 2025, 9:27 am 1 boosts 1 favorites

And that concludes the updates for 2025. I’ll be back in a week with the first update of 2026, which will include the first paper(s) of Volume 9.
I’d like to thank everyone who has supported the Open Journal of Astrophysics this year – Editors, Reviewers, Authors and the excellent Library staff at Maynooth – and who have made it such a bumper year. In 2023 we published just 50 papers, so we have more than quadrupled in two years. How many will we publish in 2026?
#arXiv250500062v2 #arXiv250704987v2 #arXiv250810843v2 #arXiv251005956v2 #CircinusX1 #coreCollapseSupernovae #Cosmology #CosmologyAndNonGalacticAstrophysics #DiamondOpenAccess #DiamondOpenAccessPublishing #EarthAndPlanetaryAstrophysics #FermiParadox #HighEnergyAstrophysicalPhenomena #OpenAccess #OpenJournalOfAstrophysics #SETI #SolarSystem #Stability #TheOpenJournalOfAstrophysics #TransverseVelocities

#arxiv250500062v2 #arxiv250704987v2 #arxiv250810843v2 #arxiv251005956v2 #circinusx1 #corecollapsesupernovae
In the Dark @[email protected] · 2025-12-27 · 10:37 UTC

Weekly Update from the Open Journal of Astrophysics – 27/12/2025
I wasn’t planning to do another update this week but I thought it would be best to complete the publications for 2025 at the Open Journal of Astrophysics, so that I don’t have to do a bigger update in the new year, and I have a bit of time this morning, so here we go.
Since the last update we have published four papers which brings the number in Volume 8 (2025) up to 201. Adding the 12 papers in the Supplement, this brings the final total for the year up to 213, and the total so far published by OJAp up to 448. In 2023 we published just 50 papers, so we have more than quadrupled in two years.
The first paper this week is “Transverse Velocities in Real-Time Cosmology: Position Drift in Relativistic N-Body Simulations” by Alexander Oestreicher (University of Southern Denmark), Chris Clarkson (QMUL, UK), Julian Adamek (Universität Zürich, CH) and Sofie Marie Koksbang (U. Southern Denmark). This study uses a general relativistic N-body simulation code to explore how cosmological structures affect position drift measurements, a new method for studying cosmic structure formation and velocity fields. This was published on Tuesday 23rd December 2025 in the folder Cosmology and Nongalactic Astrophysics.
The overlay is here:

You can find the officially accepted version on arXiv here and this is the announcement on Mastodon (Fediscience):

Open Journal of Astrophysics
@[email protected]

New Publication at the Open Journal of Astrophysics: "Transverse Velocities in Real-Time Cosmology: Position Drift in Relativistic N-Body Simulations" by Alexander Oestreicher (University of Southern Denmark), Chris Clarkson (QMUL, UK), Julian Adamek (Universität Zürich, CH) and Sofie Marie Koksbang (U. Southern Denmark)
https://doi.org/10.33232/001c.154744
December 23, 2025, 9:33 am 1 boosts 0 favorites

The second paper of the week is “On the statistical convergence of N-body simulations of the Solar System” by Hanno Rein, Garett Brown and Mei Kanda (U. Toronto, Canada). This study presents numerical experiments to determine the minimum timestep for long-term simulations of the Solar System, finding that timesteps up to 32 days yield physical results. It was published on Tuesday December 23rd in the folder Earth and Planetary Astrophysics.
The overlay is here:

You can find the official version of this one on arXiv here. The federated announcement on Mastodon is here:

Open Journal of Astrophysics
@[email protected]

New Publication at the Open Journal of Astrophysics: "On the statistical convergence of N-body simulations of the Solar System" by Hanno Rein, Garett Brown and Mei Kanda (U. Toronto, Canada)
https://doi.org/10.33232/001c.154745
December 23, 2025, 9:50 am 6 boosts 9 favorites

Next, published on 24th December 2025 in the folder High-Energy Astrophysical Phenomena, we have “The explosion jets of the core-collapse supernova remnant Circinus X-1” by Noam Soker and Muhammad Akashi (Technion, Haifa, Israel). This paper suggests that the rings in the Circinus X-1 supernova remnant resulted from jet-driven explosions, supporting the jittering-jets explosion mechanism theory for core collapse supernovae.
The overlay is here:
The officially accepted paper can be found on arXiv here and the announcement on Mastodon is here

Open Journal of Astrophysics
@[email protected]

New Publication at the Open Journal of Astrophysics: "The explosion jets of the core-collapse supernova remnant Circinus X-1" by Noam Soker and Muhammad Akashi (Technion, Haifa, Israel)
https://doi.org/10.33232/001c.154770
December 24, 2025, 9:15 am 2 boosts 1 favorites

Finally for 2025 we have “Quantifying the Fermi paradox via passive SETI: a general framework” by Matthew Civiletti (City University of New York, USA). This was published on Wednesday 24th December in the folder Instrumentation and Methods for Astrophysics. The author uses SETI observations and the Drake Equation to calculate the probability of detecting at least one extraterrestrial signal, highlighting the model’s limitations and potential improvements. The overlay is here:
The officially accepted version can be found on arXiv here and the Mastodon announcement here:

Open Journal of Astrophysics
@[email protected]

New Publication at the Open Journal of Astrophysics: "Quantifying the Fermi paradox via passive SETI: a general framework" by Matthew Civiletti (City University of New York, USA)
https://doi.org/10.33232/001c.154771
December 24, 2025, 9:27 am 1 boosts 1 favorites

And that concludes the updates for 2025. I’ll be back in a week with the first update of 2026, which will include the first paper(s) of Volume 9.
I’d like to thank everyone who has supported the Open Journal of Astrophysics this year – Editors, Reviewers, Authors and the excellent Library staff at Maynooth – and who have made it such a bumper year. In 2023 we published just 50 papers, so we have more than quadrupled in two years. How many will we publish in 2026?
#arXiv250500062v2 #arXiv250704987v2 #arXiv250810843v2 #arXiv251005956v2 #CircinusX1 #coreCollapseSupernovae #Cosmology #CosmologyAndNonGalacticAstrophysics #DiamondOpenAccess #DiamondOpenAccessPublishing #EarthAndPlanetaryAstrophysics #FermiParadox #HighEnergyAstrophysicalPhenomena #OpenAccess #OpenJournalOfAstrophysics #SETI #SolarSystem #Stability #TheOpenJournalOfAstrophysics #TransverseVelocities

#transversevelocities #theopenjournalofastrophysics #stability #solarsystem #seti #openjournalofastrophysics
In the Dark @[email protected] · 2025-12-20 · 10:35 UTC

Weekly Update from the Open Journal of Astrophysics – 20/12/2025
Christmas is coming, but it’s still time for the usual update of the week’s new papers at the Open Journal of Astrophysics. Since the last update we have published two more regular papers, described below, which brings the number in Volume 8 (2025) up to 197, as well as the 12 papers in yesterday’s Supplement, and the total published for the year up to 209, and the total so far published by OJAp up to 444.
Please note that we will be pausing publishing activity from 24th December 2025 until Monday 5th January 2026. Submissions will remain open, but no more papers will be published in Volume 8 (2025) after Christmas Eve. We will resume in the New Year with Volume 9.
Now for this week’s update. Since I blogged about the contents of the Supplement yesterday I won’t repeat them here and will instead just include the two regular papers.
The first regular paper this week is “Optimal intrinsic alignment estimators in the presence of redshift-space distortions” by Claire Lamman (Harvard-Smithsonian CfA, USA), Jonathan Blazek (Ohio State U., USA) and Daniel J. Eisenstein (Northeastern U., USA). This was published on Monday December 15th 2025 in the folder Cosmology and Nongalactic Astrophysics. The authors present estimators for quantifying intrinsic alignments in large spectroscopic surveys intended to inprove the constraints they provide for weak gravitational lensing and other cosmological applications.
The overlay is here:
You can find the officially accepted version on arXiv here and this is the announcement on Mastodon (Fediscience):

Open Journal of Astrophysics
@[email protected]

New Publication at the Open Journal of Astrophysics: "Optimal intrinsic alignment estimators in the presence of redshift-space distortions" by Claire Lamman (Harvard-Smithsonian CfA), Jonathan Blazek (Ohio State U.) and Daniel J. Eisenstein (Northeastern U.); all based in the USA
https://doi.org/10.33232/001c.154373
December 15, 2025, 8:57 am 1 boosts 0 favorites

The second regular paper of the week is “What is the contribution of gravitational infall on the mass assembly of star-forming clouds? A case study in a numerical simulation of the interstellar medium” by Noé Brucy (Universite Claude Bernard Lyon 1, France), Enrique Vázquez-Semadeni (Universidad Nacional Autónoma de México, Mexico), Tine Colman (Universite Claude Bernard Lyon 1, France), Jérémy Fensch (Universite Claude Bernard Lyon 1, France) and Ralf S. Klessen (Universität Heidelberg, Germany). This was published in the folder Astrophysics of Galaxies on Friday 19th December 2025. This paper describes research using numerical simulations to quantify how much of the mass inflow into a star-forming cloud is driven by the self-gravity of the gas and the gravity from the stellar disk.
The overlay is here:
You can find the official version of this one on arXiv here. The federated announcement on Mastodon is here:

Open Journal of Astrophysics
@[email protected]

New Publication at the Open Journal of Astrophysics: "What is the contribution of gravitational infall on the mass assembly of star-forming clouds? A case study in a numerical simulation of the interstellar medium" by Noé Brucy (Universite Claude Bernard Lyon 1, France), Enrique Vázquez-Semadeni (Universidad Nacional Autónoma de México, Mexico), Tine Colman (Lyon), Jérémy Fensch (Lyon) and Ralf S. Klessen (Universität Heidelberg, Germany)
https://doi.org/10.33232/001c.154637
December 19, 2025, 8:30 am 0 boosts 0 favorites

And that concludes the update for this week, which will be the last Saturday update for 2025.
#arXiv250416076v3 #arXiv251009480v2 #AstrophysicsOfGalaxies #CosmologyAndNonGalacticAstrophysics #DiamondOpenAccess #DiamondOpenAccessPublishing #gravitationalInfall #InterstellarMedium #intrinsicAlignments #OpenAccess #OpenJournalOfAstrophysics #RedshiftSpaceDistortions #starFormation #starFormingClouds #TheOpenJournalOfAstrophysics #weakGravitationalLensing

#arxiv250416076v3 #arxiv251009480v2 #astrophysicsofgalaxies #cosmologyandnongalacticastrophysics #diamondopenaccess #diamondopenaccesspublishing
In the Dark @[email protected] · 2025-12-20 · 10:35 UTC

Weekly Update from the Open Journal of Astrophysics – 20/12/2025
Christmas is coming, but it’s still time for the usual update of the week’s new papers at the Open Journal of Astrophysics. Since the last update we have published two more regular papers, described below, which brings the number in Volume 8 (2025) up to 197, as well as the 12 papers in yesterday’s Supplement, and the total published for the year up to 209, and the total so far published by OJAp up to 444.
Please note that we will be pausing publishing activity from 24th December 2025 until Monday 5th January 2026. Submissions will remain open, but no more papers will be published in Volume 8 (2025) after Christmas Eve. We will resume in the New Year with Volume 9.
Now for this week’s update. Since I blogged about the contents of the Supplement yesterday I won’t repeat them here and will instead just include the two regular papers.
The first regular paper this week is “Optimal intrinsic alignment estimators in the presence of redshift-space distortions” by Claire Lamman (Harvard-Smithsonian CfA, USA), Jonathan Blazek (Ohio State U., USA) and Daniel J. Eisenstein (Northeastern U., USA). This was published on Monday December 15th 2025 in the folder Cosmology and Nongalactic Astrophysics. The authors present estimators for quantifying intrinsic alignments in large spectroscopic surveys intended to inprove the constraints they provide for weak gravitational lensing and other cosmological applications.
The overlay is here:
You can find the officially accepted version on arXiv here and this is the announcement on Mastodon (Fediscience):

Open Journal of Astrophysics
@[email protected]

New Publication at the Open Journal of Astrophysics: "Optimal intrinsic alignment estimators in the presence of redshift-space distortions" by Claire Lamman (Harvard-Smithsonian CfA), Jonathan Blazek (Ohio State U.) and Daniel J. Eisenstein (Northeastern U.); all based in the USA
https://doi.org/10.33232/001c.154373
December 15, 2025, 8:57 am 1 boosts 0 favorites

The second regular paper of the week is “What is the contribution of gravitational infall on the mass assembly of star-forming clouds? A case study in a numerical simulation of the interstellar medium” by Noé Brucy (Universite Claude Bernard Lyon 1, France), Enrique Vázquez-Semadeni (Universidad Nacional Autónoma de México, Mexico), Tine Colman (Universite Claude Bernard Lyon 1, France), Jérémy Fensch (Universite Claude Bernard Lyon 1, France) and Ralf S. Klessen (Universität Heidelberg, Germany). This was published in the folder Astrophysics of Galaxies on Friday 19th December 2025. This paper describes research using numerical simulations to quantify how much of the mass inflow into a star-forming cloud is driven by the self-gravity of the gas and the gravity from the stellar disk.
The overlay is here:
You can find the official version of this one on arXiv here. The federated announcement on Mastodon is here:

Open Journal of Astrophysics
@[email protected]

New Publication at the Open Journal of Astrophysics: "What is the contribution of gravitational infall on the mass assembly of star-forming clouds? A case study in a numerical simulation of the interstellar medium" by Noé Brucy (Universite Claude Bernard Lyon 1, France), Enrique Vázquez-Semadeni (Universidad Nacional Autónoma de México, Mexico), Tine Colman (Lyon), Jérémy Fensch (Lyon) and Ralf S. Klessen (Universität Heidelberg, Germany)
https://doi.org/10.33232/001c.154637
December 19, 2025, 8:30 am 0 boosts 0 favorites

And that concludes the update for this week, which will be the last Saturday update for 2025.
#arXiv250416076v3 #arXiv251009480v2 #AstrophysicsOfGalaxies #CosmologyAndNonGalacticAstrophysics #DiamondOpenAccess #DiamondOpenAccessPublishing #gravitationalInfall #InterstellarMedium #intrinsicAlignments #OpenAccess #OpenJournalOfAstrophysics #RedshiftSpaceDistortions #starFormation #starFormingClouds #TheOpenJournalOfAstrophysics #weakGravitationalLensing

#weakgravitationallensing #theopenjournalofastrophysics #starformingclouds #starformation #redshiftspacedistortions #openjournalofastrophysics
In the Dark @[email protected] · 2025-12-19 · 17:46 UTC

Supplement to the Open Journal of Astrophysics – “Pulsar Science with the SKAO”
It’s been a busy day at the Open Journal of Astrophysics as we’ve published 12 related papers in the form of our first ever Supplement; officially it is Vol. 8 Supplement Issue 1. The idea of a Supplement is to publish a set of related papers together. I imagine it might be of interest for publishing conference proceedings, etc.
The topic of this Supplement is Pulsar Science with the Square Kilometre Array Observatory and it includes updates to the Science Case for the SKAO, the previous version of which is 10 years old. All the papers are indendependently peer-reviewed, which took some organizing and a lot of time because many potential referees are themselves members of the SKA Pulsar Science Working Group! Anyway, the final versions of all the papers hit the arXiv this morning so I published them all today.
Rather than include all 12 papers in tomorrow’s Saturday update I decided just to show the overlay for the overview of the special issue, which is here:
The following paragraph describes the content of the supplement and includes links to the other 11 papers in the issue.
The large instantaneous sensitivity, a wide frequency coverage and flexible observation modes with large number of beams in the sky are the main features of the upcoming SKA observatory’s two telescopes, the SKA-Low and the SKA-Mid, which are located on two different continents. Owing to these capabilities, the SKAO telescopes are going to be a game-changer for radio astronomy in general and pulsar astronomy in particular. The eleven articles in this special issue on pulsar science with the SKA Observatory describe its impact on different areas of pulsar science. Phase 1 of the rollout of the SKAO telescope is likely to double the known pulsar population in new surveys described in the first three papers (Keane et al. 2025; Abbate et al. 2025; Bagchi et al. 2025). These new discoveries will improve our understanding of the dynamics, evolution and gas content of globular clusters and the black hole at the centre of the Milky Way galaxy apart from increasing the samples for each of different kinds of radio emitting neutron stars (Levin et al. 2025). The larger population sample will enhance our understanding of the magneto-ionic interstellar medium (Tiburzi et al. 2025; Xu et al. 2025), the pulsar magnetosphere (Oswald et al. 2025) and pulsar wind nebulae (Gelfand et al. 2025). Moreover, the discovery of exotic neutron star systems will test gravity theory ever more stringently (Krishnan et al. 2025) and will probe fundamental physics at sub-atomic level (Basu et al. 2025). Finally, this enhanced sample is likely to make the sky portrait sharper in nano-Hertz gravitational waves impacting on our understanding of the Universe in a fundamental way (Shannon et al. 2025). In summary, the papers in this special issue describe the way the upcoming SKA Observatory’s telescopes address fundamental physics through the study of pulsars and gravitational waves.
#DiamondOpenAccessPublishing #OpenAccessPublishing #OpenJournalOfAstrophysics #PulsarScience #pulsars #SKAO #SquareKilometreArray #SquareKilometreArrayObservatory #TheOpenJournalOfAstrophysics

#diamondopenaccesspublishing #openaccesspublishing #openjournalofastrophysics #theopenjournalofastrophysics #pulsarscience #pulsars
In the Dark @[email protected] · 2025-12-19 · 17:46 UTC

Supplement to the Open Journal of Astrophysics – “Pulsar Science with the SKAO”
It’s been a busy day at the Open Journal of Astrophysics as we’ve published 12 related papers in the form of our first ever Supplement; officially it is Vol. 8 Supplement Issue 1. The idea of a Supplement is to publish a set of related papers together. I imagine it might be of interest for publishing conference proceedings, etc.
The topic of this Supplement is Pulsar Science with the Square Kilometre Array Observatory and it includes updates to the Science Case for the SKAO, the previous version of which is 10 years old. All the papers are indendependently peer-reviewed, which took some organizing and a lot of time because many potential referees are themselves members of the SKA Pulsar Science Working Group! Anyway, the final versions of all the papers hit the arXiv this morning so I published them all today.
Rather than include all 12 papers in tomorrow’s Saturday update I decided just to show the overlay for the overview of the special issue, which is here:
The following paragraph describes the content of the supplement and includes links to the other 11 papers in the issue.
The large instantaneous sensitivity, a wide frequency coverage and flexible observation modes with large number of beams in the sky are the main features of the upcoming SKA observatory’s two telescopes, the SKA-Low and the SKA-Mid, which are located on two different continents. Owing to these capabilities, the SKAO telescopes are going to be a game-changer for radio astronomy in general and pulsar astronomy in particular. The eleven articles in this special issue on pulsar science with the SKA Observatory describe its impact on different areas of pulsar science. Phase 1 of the rollout of the SKAO telescope is likely to double the known pulsar population in new surveys described in the first three papers (Keane et al. 2025; Abbate et al. 2025; Bagchi et al. 2025). These new discoveries will improve our understanding of the dynamics, evolution and gas content of globular clusters and the black hole at the centre of the Milky Way galaxy apart from increasing the samples for each of different kinds of radio emitting neutron stars (Levin et al. 2025). The larger population sample will enhance our understanding of the magneto-ionic interstellar medium (Tiburzi et al. 2025; Xu et al. 2025), the pulsar magnetosphere (Oswald et al. 2025) and pulsar wind nebulae (Gelfand et al. 2025). Moreover, the discovery of exotic neutron star systems will test gravity theory ever more stringently (Krishnan et al. 2025) and will probe fundamental physics at sub-atomic level (Basu et al. 2025). Finally, this enhanced sample is likely to make the sky portrait sharper in nano-Hertz gravitational waves impacting on our understanding of the Universe in a fundamental way (Shannon et al. 2025). In summary, the papers in this special issue describe the way the upcoming SKA Observatory’s telescopes address fundamental physics through the study of pulsars and gravitational waves.
#DiamondOpenAccessPublishing #OpenAccessPublishing #OpenJournalOfAstrophysics #PulsarScience #pulsars #SKAO #SquareKilometreArray #SquareKilometreArrayObservatory #TheOpenJournalOfAstrophysics

#theopenjournalofastrophysics #openjournalofastrophysics #openaccesspublishing #diamondopenaccesspublishing #squarekilometrearrayobservatory #squarekilometrearray
In the Dark @[email protected] · 2025-12-13 · 11:52 UTC

Weekly Update from the Open Journal of Astrophysics – 13/12/2025
It’s time once again for the usual Saturday morning update of the week’s new papers at the Open Journal of Astrophysics. Since the last update we have published a further five papers, which brings the number in Volume 8 (2025) up to 195, and the total so far published by OJAp up to 430.
The first paper this week is “Cosmic Rays Masquerading as Cool Cores: An Inverse-Compton Origin for Cool Core Cluster Emission” by Philip F. Hopkins (Caltech), Eliot Quataert (Princeton), Emily M. Silich, Jack Sayers, Sam B. Ponnada and Isabel S. Sands (Caltech). This was published on Tuesday 9th December 2025 in the folder marked High-Energy Astrophysical Phenomena. It presents an argument that cosmic-ray inverse-compton emission could contribute significantly to the X-ray surface brightness (SB) in cool-corre clusters, implying that gas densities may have been overestimated therein.
The overlay is here:
You can find the officially accepted version on arXiv here and the Fediverse announcement is here:

Open Journal of Astrophysics
@[email protected]

New Publication at the Open Journal of Astrophysics: "Cosmic Rays Masquerading as Cool Cores: An Inverse-Compton Origin for Cool Core Cluster Emission" by
Philip F. Hopkins (Caltech), Eliot Quataert (Princeton), Emily M. Silich, Jack Sayers, Sam B. Ponnada and Isabel S. Sands (Caltech)
https://doi.org/10.33232/001c.154053
December 9, 2025, 7:22 am 1 boosts 0 favorites

The second paper of the week is “Detecting False Positives With Derived Planetary Parameters: Experimenting with the KEPLER Dataset” by Ayan Bin Rafaih (Aitchison College, Lahore, Pakistan) and Zachary Murray (Université Côte d’Azur, France). This one was published on 9th December 2025 in the folder Earth and Planetary Astrophysics. It is an investigation into the performance of a range of machine-learning algorithms on the KEPLER dataset, using precision-recall trade-off and accuracy metrics.
The overlay is here:
You can find the official version of this one on arXiv here. The federated announcement on Mastodon is here:

Open Journal of Astrophysics
@[email protected]

New Publication at the Open Journal of Astrophysics: "Detecting False Positives With Derived Planetary Parameters: Experimenting with the KEPLER Dataset" by Ayan Bin Rafaih (Aitchison College, Lahore, Pakistan) and Zachary Murray (Université Côte d’Azur, France)
https://doi.org/10.33232/001c.154054
December 9, 2025, 7:34 am 1 boosts 0 favorites

Next one up is “The role of peculiar velocity uncertainties in standard siren cosmology” by Chris Blake and Ryan J. Turner (Swinburne, Australia). This paper discusses the impact of peculiar velocities on the error in H0 determinations from local distance indicators with observed redshifts, incorporating the effect of bulk flows. It was published on Tuesday 9th December in the folder Cosmology and Nongalactic Astrophysics.
The overlay is here:
You can find the official accepted version on arXiv here. The fediverse announcement is here:

Open Journal of Astrophysics
@[email protected]

New Publication at the Open Journal of Astrophysics: "The role of peculiar velocity uncertainties in standard siren cosmology" by Chris Blake and Ryan J. Turner (Swinburne, Australia)
https://doi.org/10.33232/001c.154055
December 9, 2025, 7:47 am 1 boosts 0 favorites

The fourth article of the week is “Transient QPOs of Fermi-LAT blazars with Linearly Multiplicative Oscillations” by P. Penil (Clemson University, USA) and 7 others based in the USA, Italy and Germany. This was published on Thursday 10th December in the folder High-Energy Astrophysical Phenomena. This paper presents an investigation of patterns of quasi-periodic oscillations in observed blazar systems characterized by periodic multiplicative amplitudes including both the periodicities and long-term variations. The overlay is here:
You can find the official published version on arXiv here. The Fediverse announcement follows:

Open Journal of Astrophysics
@[email protected]

New Publication at the Open Journal of Astrophysics: "Transient QPOs of Fermi-LAT blazars with Linearly Multiplicative Oscillations" by P. Penil (Clemson University, USA) and 7 others based in the USA, Italy and Germany
https://doi.org/10.33232/001c.154123
December 10, 2025, 12:22 pm 0 boosts 1 favorites

The last paper for this week is “Tidally Delayed Spin-Down of Very Low Mass Stars” by Ketevan Kotorashvili and Eric G. Blackman (U. Rochester, USA). This was published on Friday 12th December (yesterday) in the folder Solar and Stellar Astrophysics. It discusses the effect of tides from sub-stellar companions on rotational evolution of very low-mass stars, suggesting that these may explain the dearth of field, late-type M dwarfs with intermediate rotation periods.
The overlay is here:

You can find the officially-accepted version on arXiv here, and the Mastodon announcement is here:

Open Journal of Astrophysics
@[email protected]

New Publication at the Open Journal of Astrophysics: "Tidally Delayed Spin-Down of Very Low Mass Stars" by Ketevan Kotorashvili and Eric G. Blackman (U. Rochester, USA)
https://doi.org/10.33232/001c.154268
December 12, 2025, 10:31 am 1 boosts 0 favorites

And that concludes the update for this week. I will do another of these regular announcements next Saturday, which will be the last such update for 2025. Will we make it past 200 for the year? Tune in next week to find out!
#arxiv241117916v3 #arxiv250713906v3 #arxiv250718712v2 #arxiv250813801v2 #arxiv250903101v2 #blazars #coolCoreClusters #cosmicRays #cosmologyAndNongalacticAstrophysics #diamondOpenAccess #diamondOpenAccessPublishing #earthAndPlanetaryAstrophysics #fermiLat #highEnergyAstrophysicalPhenomena #kepler #machineLearning #openAccess #openAccessPublishing #openJournalOfAstrophysics #peculiarMotions #quasiPeriodicOscillations #solarAndStellarAstrophysics #standardSirens #theOpenJournalOfAstrophysics #tidalSpinDown #transientAstronomy #veryLowMassStars

#arxiv241117916v3 #arxiv250713906v3 #arxiv250718712v2 #arxiv250813801v2 #arxiv250903101v2 #blazars
In the Dark @[email protected] · 2025-12-13 · 11:52 UTC

Weekly Update from the Open Journal of Astrophysics – 13/12/2025
It’s time once again for the usual Saturday morning update of the week’s new papers at the Open Journal of Astrophysics. Since the last update we have published a further five papers, which brings the number in Volume 8 (2025) up to 195, and the total so far published by OJAp up to 430.
The first paper this week is “Cosmic Rays Masquerading as Cool Cores: An Inverse-Compton Origin for Cool Core Cluster Emission” by Philip F. Hopkins (Caltech), Eliot Quataert (Princeton), Emily M. Silich, Jack Sayers, Sam B. Ponnada and Isabel S. Sands (Caltech). This was published on Tuesday 9th December 2025 in the folder marked High-Energy Astrophysical Phenomena. It presents an argument that cosmic-ray inverse-compton emission could contribute significantly to the X-ray surface brightness (SB) in cool-corre clusters, implying that gas densities may have been overestimated therein.
The overlay is here:
You can find the officially accepted version on arXiv here and the Fediverse announcement is here:

Open Journal of Astrophysics
@[email protected]

New Publication at the Open Journal of Astrophysics: "Cosmic Rays Masquerading as Cool Cores: An Inverse-Compton Origin for Cool Core Cluster Emission" by
Philip F. Hopkins (Caltech), Eliot Quataert (Princeton), Emily M. Silich, Jack Sayers, Sam B. Ponnada and Isabel S. Sands (Caltech)
https://doi.org/10.33232/001c.154053
December 9, 2025, 7:22 am 1 boosts 0 favorites

The second paper of the week is “Detecting False Positives With Derived Planetary Parameters: Experimenting with the KEPLER Dataset” by Ayan Bin Rafaih (Aitchison College, Lahore, Pakistan) and Zachary Murray (Université Côte d’Azur, France). This one was published on 9th December 2025 in the folder Earth and Planetary Astrophysics. It is an investigation into the performance of a range of machine-learning algorithms on the KEPLER dataset, using precision-recall trade-off and accuracy metrics.
The overlay is here:
You can find the official version of this one on arXiv here. The federated announcement on Mastodon is here:

Open Journal of Astrophysics
@[email protected]

New Publication at the Open Journal of Astrophysics: "Detecting False Positives With Derived Planetary Parameters: Experimenting with the KEPLER Dataset" by Ayan Bin Rafaih (Aitchison College, Lahore, Pakistan) and Zachary Murray (Université Côte d’Azur, France)
https://doi.org/10.33232/001c.154054
December 9, 2025, 7:34 am 1 boosts 0 favorites

Next one up is “The role of peculiar velocity uncertainties in standard siren cosmology” by Chris Blake and Ryan J. Turner (Swinburne, Australia). This paper discusses the impact of peculiar velocities on the error in H0 determinations from local distance indicators with observed redshifts, incorporating the effect of bulk flows. It was published on Tuesday 9th December in the folder Cosmology and Nongalactic Astrophysics.
The overlay is here:
You can find the official accepted version on arXiv here. The fediverse announcement is here:

Open Journal of Astrophysics
@[email protected]

New Publication at the Open Journal of Astrophysics: "The role of peculiar velocity uncertainties in standard siren cosmology" by Chris Blake and Ryan J. Turner (Swinburne, Australia)
https://doi.org/10.33232/001c.154055
December 9, 2025, 7:47 am 1 boosts 0 favorites

The fourth article of the week is “Transient QPOs of Fermi-LAT blazars with Linearly Multiplicative Oscillations” by P. Penil (Clemson University, USA) and 7 others based in the USA, Italy and Germany. This was published on Thursday 10th December in the folder High-Energy Astrophysical Phenomena. This paper presents an investigation of patterns of quasi-periodic oscillations in observed blazar systems characterized by periodic multiplicative amplitudes including both the periodicities and long-term variations. The overlay is here:
You can find the official published version on arXiv here. The Fediverse announcement follows:

Open Journal of Astrophysics
@[email protected]

New Publication at the Open Journal of Astrophysics: "Transient QPOs of Fermi-LAT blazars with Linearly Multiplicative Oscillations" by P. Penil (Clemson University, USA) and 7 others based in the USA, Italy and Germany
https://doi.org/10.33232/001c.154123
December 10, 2025, 12:22 pm 0 boosts 1 favorites

The last paper for this week is “Tidally Delayed Spin-Down of Very Low Mass Stars” by Ketevan Kotorashvili and Eric G. Blackman (U. Rochester, USA). This was published on Friday 12th December (yesterday) in the folder Solar and Stellar Astrophysics. It discusses the effect of tides from sub-stellar companions on rotational evolution of very low-mass stars, suggesting that these may explain the dearth of field, late-type M dwarfs with intermediate rotation periods.
The overlay is here:

You can find the officially-accepted version on arXiv here, and the Mastodon announcement is here:

Open Journal of Astrophysics
@[email protected]

New Publication at the Open Journal of Astrophysics: "Tidally Delayed Spin-Down of Very Low Mass Stars" by Ketevan Kotorashvili and Eric G. Blackman (U. Rochester, USA)
https://doi.org/10.33232/001c.154268
December 12, 2025, 10:31 am 1 boosts 0 favorites

And that concludes the update for this week. I will do another of these regular announcements next Saturday, which will be the last such update for 2025. Will we make it past 200 for the year? Tune in next week to find out!
#arxiv241117916v3 #arxiv250713906v3 #arxiv250718712v2 #arxiv250813801v2 #arxiv250903101v2 #blazars #coolCoreClusters #cosmicRays #cosmologyAndNongalacticAstrophysics #diamondOpenAccess #diamondOpenAccessPublishing #earthAndPlanetaryAstrophysics #fermiLat #highEnergyAstrophysicalPhenomena #kepler #machineLearning #openAccess #openAccessPublishing #openJournalOfAstrophysics #peculiarMotions #quasiPeriodicOscillations #solarAndStellarAstrophysics #standardSirens #theOpenJournalOfAstrophysics #tidalSpinDown #transientAstronomy #veryLowMassStars

#verylowmassstars #transientastronomy #tidalspindown #theopenjournalofastrophysics #standardsirens #solarandstellarastrophysics
In the Dark @[email protected] · 2025-12-06 · 11:10 UTC

Weekly Update from the Open Journal of Astrophysics – 06/12/2025
Once again it’s time for the usual Saturday morning update of the week’s new papers at the Open Journal of Astrophysics. Since the last update we have published a further six papers, which brings the number in Volume 8 (2025) up to 190, and the total so far published by OJAp up to 425. I blogged about the significance of the latter figure here.
The first paper this week is “The galaxy-IGM connection in THESAN: observability and information content of the galaxy-Lyman-alpha cross-correlation at z>6” by Enrico Garaldi (U. Tokyo, Japan), Verena Bellscheidt (Tech. U. Munich, Germany), Aaron Smith (U. Texas Austin, USA) and Rahul Kannan (York U. Canada). This paper was published on Monday 1st December 2025 in the folder Cosmology and Nongalactic Astrophysics. It describes an investigation of the impact of observational limitations on the ability to retrieve the intrinsic galaxy-Lyman-alpha cross correlation from line-of-sight observations.
The overlay is here:

You can find the officially accepted version on arXiv here and the Fediverse announcement is here:

Open Journal of Astrophysics
@[email protected]

New Publication at the Open Journal of Astrophysics: "The galaxy-IGM connection in THESAN: observability and information content of the galaxy-Lyman-alpha cross-correlation at z>6" by Enrico Garaldi (U. Tokyo, Japan), Verena Bellscheidt (Tech. U. Munich, Germany), Aaron Smith (U. Texas Austin, USA) and Rahul Kannan (York U. Canada)
https://doi.org/10.33232/001c.151666
December 1, 2025, 8:37 am 1 boosts 0 favorites

The second paper of the week is “A Less Terrifying Universe? Mundanity as an Explanation for the Fermi Paradox” by Robin H.D. Corbet (U. Maryland, USA). This paper was published on 1st December 2025 in the folder Instrumentation and Methods for Astrophysics. It presents a discussion of possible explanations for the lack of s evidence for the presence of technology-using extraterrestrial civilizations in the Galaxy (usually called the Fermi paradox). The overlay is here:

You can find the official version of this one on arXiv here. The federated announcement on Mastodon is here:

Open Journal of Astrophysics
@[email protected]

New Publication at the Open Journal of Astrophysics: "A Less Terrifying Universe? Mundanity as an Explanation for the Fermi Paradox" by Robin H.D. Corbet (U. Maryland, USA)
https://doi.org/10.33232/001c.151454
December 1, 2025, 8:50 am 2 boosts 2 favorites

Next one up is “Sulphur abundances in star-forming regions from optical emission lines: A new approach based on photoionization models consistent with the direct method” by Enrique Pérez-Montero, Borja Pérez-Díaz, & José M. Vílchez ( (Instituto de Astrofísica de Andalucía, Spain), Igor A. Zinchenko (LMU, Germany), Asier Castrillo, Marta Gavilán, Sandra Zamora & Ángeles I. Díaz (Universidad Autonoma de Madrid, Spain). This was published on 1st December 2025 in the folder Astrophysics of Galaxies. This study uses the emission lines produced in the optical part of the spectrum and with photoionization models to derive sulphur chemical abundances in the gas-phase of star-forming galaxies.
The overlay is here:

You can find the official accepted version on arXiv here. The fediverse announcement is here:

Open Journal of Astrophysics
@[email protected]

New Publication at the Open Journal of Astrophysics: "Sulphur abundances in star-forming regions from optical emission lines: A new approach based on photoionization models consistent with the direct method" by Enrique Pérez-Montero, Borja Pérez-Díaz, & José M. Vílchez ( (Instituto de Astrofísica de Andalucía, Spain), Igor A. Zinchenko (LMU, Germany), Asier Castrillo, Marta Gavilán, Sandra Zamora & Ángeles I. Díaz (Universidad Autonoma de Madrid , Spain)
https://doi.org/10.33232/001c.151253
December 1, 2025, 9:12 am 0 boosts 0 favorites

The fourth article of the week is “Bayesian Posteriors with Stellar Population Synthesis on GPUs” by Georgios Zacharegkas & Andrew Hearin (Argonne National Laboratory, USA) and Andrew Benson (Carnegie Observatories, USA). This is an exploration of a range of computational techniques aimed at accelerating Stellar Population Synthesis predictions of galaxy photometry using the JAX library to target GPUs (Graphics Processing Units, in case you didn’t know). This paper was published on Tuesday December 2nd 2025 in the folder Astrophysics of Galaxies.
The overlay is here:

You can find the official published version on arXiv here. The Fediverse announcement follows:

Open Journal of Astrophysics
@[email protected]

New Publication at the Open Journal of Astrophysics: "Bayesian Posteriors with Stellar Population Synthesis on GPUs" by Georgios Zacharegkas & Andrew Hearin (Argonne National Laboratory, USA) and Andrew Benson (Carnegie Observatories, USA)
https://doi.org/10.33232/001c.151255
December 2, 2025, 7:38 am 3 boosts 1 favorites

Next one up is “IAEmu: Learning Galaxy Intrinsic Alignment Correlations” by Sneh Pandya Yuanyuan Yang, Nicholas Van Alfen, Jonathan Blazek and Robin Walters (Northeastern University, Boston, USA). This presents a neural-network-based emulator that predicts the galaxy position-position, position-orientation, and orientation-orientation, correlation functions and their uncertainties using mock catalogs based on the halo occupation distribution (HOD) framework. It was published on December 2nd 2025 in the folder Cosmology and Nongalactic Astrophysics. The overlay is here:
The official accepted version can be found on arXiv here. The Mastodon announcement is here:

Open Journal of Astrophysics
@[email protected]

New Publication at the Open Journal of Astrophysics: "IAEmu: Learning Galaxy Intrinsic Alignment Correlations" by Sneh Pandya Yuanyuan Yang, Nicholas Van Alfen, Jonathan Blazek and Robin Walters (Northeastern University, Boston, USA)
https://doi.org/10.33232/001c.151749
December 2, 2025, 7:52 am 1 boosts 0 favorites

The last paper for this weel is “Unraveling the Nature of the Nuclear Transient AT2020adpi” by Paarmita Pandey (Ohio State University, USA) and a team of 15 others based in the USA, UK and Australia. This was published on Thursday December 4th 2025 in the folder High-Energy Astrophysical Phenomena. It is an investigation into a particular transient event AT2020adpi and a discussion of whether it is an extreme example of AGN variability or a Tidal Disruption Event (TDE). The overlay is here:
You can find the officially-accepted version on arXiv here, and the Mastodon announcement is here:

Open Journal of Astrophysics
@[email protected]

New Publication at the Open Journal of Astrophysics: "Unraveling the Nature of the Nuclear Transient AT2020adpi" by Paarmita Pandey (Ohio State University, USA) and 15 others based in the USA, UK and Australia
https://doi.org/10.33232/001c.151453
December 4, 2025, 8:48 am 1 boosts 0 favorites

And that concludes the update for this week. I will do another next Saturday.
#arxiv241002850v2 #arxiv250405235v4 #arxiv250614736v2 #arxiv250619919v2 #arxiv250903593v3 #arxiv250922878v2 #astrophysicsOfGalaxies #at2020adpi #bayesianMethods #cosmologyAndNongalacticAstrophysics #diamondOpenAccessPublishing #fermiParadox #gpus #highEnergyAstrophysicalPhenomena #instrumentationAndMethodsForAstrophysics #intrinsicAlignments #lymanAlpha #machineLearning #nuclearTransient #openAccessPublishing #openJournalOfAstrophysics #photoionization #seti #starFormation #stellarPopulations #suplhur #theOpenJournalOfAstrophysics #thesanSimulations

#arxiv241002850v2 #arxiv250405235v4 #arxiv250614736v2 #arxiv250619919v2 #arxiv250903593v3 #arxiv250922878v2
In the Dark @[email protected] · 2025-12-06 · 11:10 UTC

Weekly Update from the Open Journal of Astrophysics – 06/12/2025
Once again it’s time for the usual Saturday morning update of the week’s new papers at the Open Journal of Astrophysics. Since the last update we have published a further six papers, which brings the number in Volume 8 (2025) up to 190, and the total so far published by OJAp up to 425. I blogged about the significance of the latter figure here.
The first paper this week is “The galaxy-IGM connection in THESAN: observability and information content of the galaxy-Lyman-alpha cross-correlation at z>6” by Enrico Garaldi (U. Tokyo, Japan), Verena Bellscheidt (Tech. U. Munich, Germany), Aaron Smith (U. Texas Austin, USA) and Rahul Kannan (York U. Canada). This paper was published on Monday 1st December 2025 in the folder Cosmology and Nongalactic Astrophysics. It describes an investigation of the impact of observational limitations on the ability to retrieve the intrinsic galaxy-Lyman-alpha cross correlation from line-of-sight observations.
The overlay is here:

You can find the officially accepted version on arXiv here and the Fediverse announcement is here:

Open Journal of Astrophysics
@[email protected]

New Publication at the Open Journal of Astrophysics: "The galaxy-IGM connection in THESAN: observability and information content of the galaxy-Lyman-alpha cross-correlation at z>6" by Enrico Garaldi (U. Tokyo, Japan), Verena Bellscheidt (Tech. U. Munich, Germany), Aaron Smith (U. Texas Austin, USA) and Rahul Kannan (York U. Canada)
https://doi.org/10.33232/001c.151666
December 1, 2025, 8:37 am 1 boosts 0 favorites

The second paper of the week is “A Less Terrifying Universe? Mundanity as an Explanation for the Fermi Paradox” by Robin H.D. Corbet (U. Maryland, USA). This paper was published on 1st December 2025 in the folder Instrumentation and Methods for Astrophysics. It presents a discussion of possible explanations for the lack of s evidence for the presence of technology-using extraterrestrial civilizations in the Galaxy (usually called the Fermi paradox). The overlay is here:

You can find the official version of this one on arXiv here. The federated announcement on Mastodon is here:

Open Journal of Astrophysics
@[email protected]

New Publication at the Open Journal of Astrophysics: "A Less Terrifying Universe? Mundanity as an Explanation for the Fermi Paradox" by Robin H.D. Corbet (U. Maryland, USA)
https://doi.org/10.33232/001c.151454
December 1, 2025, 8:50 am 2 boosts 2 favorites

Next one up is “Sulphur abundances in star-forming regions from optical emission lines: A new approach based on photoionization models consistent with the direct method” by Enrique Pérez-Montero, Borja Pérez-Díaz, & José M. Vílchez ( (Instituto de Astrofísica de Andalucía, Spain), Igor A. Zinchenko (LMU, Germany), Asier Castrillo, Marta Gavilán, Sandra Zamora & Ángeles I. Díaz (Universidad Autonoma de Madrid, Spain). This was published on 1st December 2025 in the folder Astrophysics of Galaxies. This study uses the emission lines produced in the optical part of the spectrum and with photoionization models to derive sulphur chemical abundances in the gas-phase of star-forming galaxies.
The overlay is here:

You can find the official accepted version on arXiv here. The fediverse announcement is here:

Open Journal of Astrophysics
@[email protected]

New Publication at the Open Journal of Astrophysics: "Sulphur abundances in star-forming regions from optical emission lines: A new approach based on photoionization models consistent with the direct method" by Enrique Pérez-Montero, Borja Pérez-Díaz, & José M. Vílchez ( (Instituto de Astrofísica de Andalucía, Spain), Igor A. Zinchenko (LMU, Germany), Asier Castrillo, Marta Gavilán, Sandra Zamora & Ángeles I. Díaz (Universidad Autonoma de Madrid , Spain)
https://doi.org/10.33232/001c.151253
December 1, 2025, 9:12 am 0 boosts 0 favorites

The fourth article of the week is “Bayesian Posteriors with Stellar Population Synthesis on GPUs” by Georgios Zacharegkas & Andrew Hearin (Argonne National Laboratory, USA) and Andrew Benson (Carnegie Observatories, USA). This is an exploration of a range of computational techniques aimed at accelerating Stellar Population Synthesis predictions of galaxy photometry using the JAX library to target GPUs (Graphics Processing Units, in case you didn’t know). This paper was published on Tuesday December 2nd 2025 in the folder Astrophysics of Galaxies.
The overlay is here:

You can find the official published version on arXiv here. The Fediverse announcement follows:

Open Journal of Astrophysics
@[email protected]

New Publication at the Open Journal of Astrophysics: "Bayesian Posteriors with Stellar Population Synthesis on GPUs" by Georgios Zacharegkas & Andrew Hearin (Argonne National Laboratory, USA) and Andrew Benson (Carnegie Observatories, USA)
https://doi.org/10.33232/001c.151255
December 2, 2025, 7:38 am 3 boosts 1 favorites

Next one up is “IAEmu: Learning Galaxy Intrinsic Alignment Correlations” by Sneh Pandya Yuanyuan Yang, Nicholas Van Alfen, Jonathan Blazek and Robin Walters (Northeastern University, Boston, USA). This presents a neural-network-based emulator that predicts the galaxy position-position, position-orientation, and orientation-orientation, correlation functions and their uncertainties using mock catalogs based on the halo occupation distribution (HOD) framework. It was published on December 2nd 2025 in the folder Cosmology and Nongalactic Astrophysics. The overlay is here:
The official accepted version can be found on arXiv here. The Mastodon announcement is here:

Open Journal of Astrophysics
@[email protected]

New Publication at the Open Journal of Astrophysics: "IAEmu: Learning Galaxy Intrinsic Alignment Correlations" by Sneh Pandya Yuanyuan Yang, Nicholas Van Alfen, Jonathan Blazek and Robin Walters (Northeastern University, Boston, USA)
https://doi.org/10.33232/001c.151749
December 2, 2025, 7:52 am 1 boosts 0 favorites

The last paper for this weel is “Unraveling the Nature of the Nuclear Transient AT2020adpi” by Paarmita Pandey (Ohio State University, USA) and a team of 15 others based in the USA, UK and Australia. This was published on Thursday December 4th 2025 in the folder High-Energy Astrophysical Phenomena. It is an investigation into a particular transient event AT2020adpi and a discussion of whether it is an extreme example of AGN variability or a Tidal Disruption Event (TDE). The overlay is here:
You can find the officially-accepted version on arXiv here, and the Mastodon announcement is here:

Open Journal of Astrophysics
@[email protected]

New Publication at the Open Journal of Astrophysics: "Unraveling the Nature of the Nuclear Transient AT2020adpi" by Paarmita Pandey (Ohio State University, USA) and 15 others based in the USA, UK and Australia
https://doi.org/10.33232/001c.151453
December 4, 2025, 8:48 am 1 boosts 0 favorites

And that concludes the update for this week. I will do another next Saturday.
#arxiv241002850v2 #arxiv250405235v4 #arxiv250614736v2 #arxiv250619919v2 #arxiv250903593v3 #arxiv250922878v2 #astrophysicsOfGalaxies #at2020adpi #bayesianMethods #cosmologyAndNongalacticAstrophysics #diamondOpenAccessPublishing #fermiParadox #gpus #highEnergyAstrophysicalPhenomena #instrumentationAndMethodsForAstrophysics #intrinsicAlignments #lymanAlpha #machineLearning #nuclearTransient #openAccessPublishing #openJournalOfAstrophysics #photoionization #seti #starFormation #stellarPopulations #suplhur #theOpenJournalOfAstrophysics #thesanSimulations

#thesansimulations #theopenjournalofastrophysics #suplhur #stellarpopulations #starformation #seti
In the Dark @[email protected] · 2025-12-04 · 12:19 UTC

Like a Million Pounds…
I’ve come down with some sort of lurgy and had to cancel a tutorial that was due to take place today, which I am sorry about. I did, however, manage to rise from my sick bed earlier this morning to publish a paper at the Open Journal of Astrophysics. When I checked the publishing dashboard I saw that this one is paper No. 425. This is a significant figure if you reckon by the cost of an Article Processing Charge (APC) at Monthly Notices of the Royal Astronomical Society. The current APC is £2356 per paper. If you multiply this by 425 the result is just over a million pounds (£1,001,300 to be exact). The Open Journal of Astrophysics, being a Diamond Open Access journal, is totally free for authors.
I mentioned a couple of weeks ago, that this is a small fraction of the money being wasted by the astronomical community worldwide on publication charges but if even a small operation like ours can save a million pounds, just think of what could happen if we all published this way! For one thing, there would certainly be more money available for actual research. That doesn’t only go for astronomy, of course: almost every scientific discipline is being ripped off by publishers who have hijacked the Open Access movement to generate income from APCs.
I’ll repeat the quotation I posted yesterday about a scandal relating to corporate publishing giant Elsevier
The scandal exposes the windfall profits of scientific publishers, who in recent years have amassed billions of dollars in earnings from public funds earmarked for science.
It’s a shocking idea, I know, but what if we spent public funds on what they are supposed to be spent on rather than handing millions to greedy publishers?
#apc #articleProcessingCharge #diamondOpenAccess #mnras #monthlyNoticesOfTheRoyalAstronomicalSociety #openAccess #openJournalOfAstrophysics #theOpenJournalOfAstrophysics

#apc #articleprocessingcharge #diamondopenaccess #mnras #monthlynoticesoftheroyalastronomicalsociety #openaccess
In the Dark @[email protected] · 2025-12-04 · 12:19 UTC

Like a Million Pounds…
I’ve come down with some sort of lurgy and had to cancel a tutorial that was due to take place today, which I am sorry about. I did, however, manage to rise from my sick bed earlier this morning to publish a paper at the Open Journal of Astrophysics. When I checked the publishing dashboard I saw that this one is paper No. 425. This is a significant figure if you reckon by the cost of an Article Processing Charge (APC) at Monthly Notices of the Royal Astronomical Society. The current APC is £2356 per paper. If you multiply this by 425 the result is just over a million pounds (£1,001,300 to be exact). The Open Journal of Astrophysics, being a Diamond Open Access journal, is totally free for authors.
I mentioned a couple of weeks ago, that this is a small fraction of the money being wasted by the astronomical community worldwide on publication charges but if even a small operation like ours can save a million pounds, just think of what could happen if we all published this way! For one thing, there would certainly be more money available for actual research. That doesn’t only go for astronomy, of course: almost every scientific discipline is being ripped off by publishers who have hijacked the Open Access movement to generate income from APCs.
I’ll repeat the quotation I posted yesterday about a scandal relating to corporate publishing giant Elsevier
The scandal exposes the windfall profits of scientific publishers, who in recent years have amassed billions of dollars in earnings from public funds earmarked for science.
It’s a shocking idea, I know, but what if we spent public funds on what they are supposed to be spent on rather than handing millions to greedy publishers?
#apc #articleProcessingCharge #diamondOpenAccess #mnras #monthlyNoticesOfTheRoyalAstronomicalSociety #openAccess #openJournalOfAstrophysics #theOpenJournalOfAstrophysics

#theopenjournalofastrophysics #openjournalofastrophysics #openaccess #monthlynoticesoftheroyalastronomicalsociety #mnras #diamondopenaccess
In the Dark @[email protected] · 2025-11-29 · 10:25 UTC

Weekly Update from the Open Journal of Astrophysics – 29/11/2025
It’s Saturday again, so it’s time for the usual update of the week’s new papers at the Open Journal of Astrophysics. Publishing this week was interrupted by the Thanksgiving holiday in the United States, which meant there were no arXiv announcements yesterday. Nevertheless, since the last update we have published another four papers, which brings the number in Volume 8 (2025) up to 184, and the total so far published by OJAp up to 419.
The first paper this week is “A theoretical prediction for the dipole in nearby distances using cosmography” by Hayley J. Macpherson (U. Chicago, USA) and Asta Heinesen (Niels Bohr Institute, Denmark). This was published on Monday 24th November 2025 in the folder Cosmology and Nongalactic Astrophysics. It presents a method to predict the dipole in luminosity distances that arises due to nearby inhomogeneities to leading-order correction to the standard isotropic distance-redshift law. Incidentally, I wrote about a talk by one of the authors here.
The overlay is here:

You can find the officially accepted version on arXiv here and the Fediverse announcement is here:

Open Journal of Astrophysics
@[email protected]

New Publication at the Open Journal of Astrophysics: "A theoretical prediction for the dipole in nearby distances using cosmography" by Hayley J Macpherson (U. Chicago, USA) and Asta Heinesen (Niels Bohr Institute, Denmark)
https://doi.org/10.33232/001c.150319
November 24, 2025, 8:25 am 2 boosts 1 favorites

The second paper of the week is “A Targeted Gamma-Ray Search of Five Prominent Galaxy Merger Systems with 17 years of Fermi-LAT Data” by Siddhant Manna and Shantanu Desai (IIT Hyderabad Kandi, India). This one was published on Tuesday November 25th 2025 in the folder marked High-Energy Astrophysical Phenomena. It describes a search for gamma-ray emission in Fermi-LAT data from five merging galaxy systems with marginal detections for two of them
The overlay is here:

You can find the official version of this one on arXiv here. The federated announcement on Mastodon is here:

Next one up is “Metallicity fluctuation statistics in the interstellar medium and young stars – II. Elemental cross-correlations and the structure of chemical abundance space” by Mark R. Krumholz (ANU, Australia), Yuan-Sen Ting (Ohio State U., USA), Zefeng Li (Durham U., UK), Chuhan Zhang (ANU), Jennifer Mead (Columbia U., USA) and Melissa K. Ness (ANU). This was published in the folder Astrophysics of Galaxies on Wednesday November 26th. It presents an extended stochastically-forced diffusion model for the chemical evolution of galaxies, making quantitative predictions for the degree of correlation in abundance patterns in both gas and young stars.
The overlay is here:

You can find the official accepted version on arXiv here. The fediverse announcement is here:

Open Journal of Astrophysics
@[email protected]

New Publication at the Open Journal of Astrophysics: "Metallicity fluctuation statistics in the interstellar medium and young stars – II. Elemental cross-correlations and the structure of chemical abundance space" by Mark R. Krumholz (ANU, Australia), Yuan-Sen Ting (Ohio State U., USA), Zefeng Li (Durham U., UK), Chuhan Zhang (ANU), Jennifer Mead (Columbia U., USA) and Melissa K. Ness (ANU)
https://doi.org/10.33232/001c.150356
November 26, 2025, 8:34 am 1 boosts 1 favorites

The fourth and final paper of the week is “Simulating realistic Lyman-alpha emitting galaxies including the effect of radiative transfer” by Hasti Khoraminezhad & Shun Saito (Missouri Institute of Science & Technology, USA), Max Gronke (U. Heidelberg, Germany) and Chris Byrohl (MPA Garching, Germany). An empirical model for Lyman-alpha emitters (LAEs) which provides predictions for the halo occupation distributions and relationship between luminosity and halo mass, including the distribution of satellite LAEs. It was published on Thursday November 27th 2025 in the folder Astrophysics of Galaxies.
The overlay is here:
You can find the official published version on arXiv here. The Fediverse announcement follows:

Open Journal of Astrophysics
@[email protected]

New Publication at the Open Journal of Astrophysics: "Simulating realistic Lyman-alpha emitting galaxies including the effect of radiative transfer" by Hasti Khoraminezhad & Shun Saito (Missouri Institute of Science & Technology, USA), Max Gronke (U. Heidelberg, Germany) and Chris Byrohl (MPA Garching, Germany)
https://doi.org/10.33232/001c.151254
November 27, 2025, 9:20 am 1 boosts 1 favorites

And that concludes the update for this week. I will do another next Saturday.
#arxiv250701095v3 #arxiv250714572v2 #arxiv250716707v2 #arxiv250806232v2 #astrophysicsOfGalaxies #chemicalAbundances #cosmography #cosmology #cosmologyAndNongalacticAstrophysics #diamondOpenAccess #diamondOpenAccessPublishing #fermiLat #galaxyMergers #gammaRay #highEnergyAstrophysicalPhenomena #lymanAlphaEmitters #metallicity #openAccess #openAccessPublishing #openJournalOfAstrophysics #theOpenJournalOfAstrophysics

#arxiv250701095v3 #arxiv250714572v2 #arxiv250716707v2 #arxiv250806232v2 #astrophysicsofgalaxies #chemicalabundances