#galaxyevolution — Public Fediverse posts

Weekly Update from the Open Journal of Astrophysics 15/08/2026

Although it’s still holiday season for some, it’s time once more for another Saturday update of activity at the Open Journal of Astrophysics. Since the last update we have published a further four papers, bringing the number in Volume 9 (2026) to 171 and the total so far published by OJAp up to 619.

I continue to include the posts made on our Mastodon account (on Fediscience); these announcements also show the DOI for each paper.

The first paper to report this week was published on Monday 10th August in the folder High-Energy Astrophysical Phenomena. “Search for neutrino emission from blazar γ-ray flares accounting for possible neutrino time delays” by Egor Podlesny & Foteini Oikonomou (Norwegian University of Science & Technology, Trondheim, Norway) investigates high-energy neutrino emissions associated with blazar flares, using data from IceCat-1, MOJAVE, CGRaBS, and Fermi-LAT. A slight correlation was found, consistent with the null hypothesis.

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

https://fediscience.org/@OJ_Astro/117069981161677800

The second paper for this week, published on Tuesday 11th August in the folder Cosmology and Nongalactic Astrophysics is “The velocity coherence scale: a novel probe of cosmic homogeneity and a potential standard ruler” by Leonardo Giani (Swinburne University of Technology), Cullan Howlet (U. Queensland), Chris Blake (Swinburne), Ryan J. Turner (Australia National University) and Tamara M. Davis (U. Queensland) – all in Australia. This paper argues that velocity coherence scale, a measure that identifies the transition point of galaxy motion from correlated to anti-correlated, could potentially characterize the onset of cosmic homogeneity.

The overlay looks like this:

The official version of the paper can be found on arXiv here and the Fediverse announcement here:

https://fediscience.org/@OJ_Astro/117075588846174571

The third paper of the week, also published on Tuesday 11th Augus, but in the folder Astrophysics of Galaxies, is “A GLIMPSE of the 99%: a census of the faintest galaxies during the epoch of reionization and its implications for galaxy formation models” by Hakim Atek (Sorbonne Université, Paris, France) and 21 others based around the world.

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/117075737363441518

The fourth and final paper of the week was published on Wednesday 12th August in the folder Astrophysics of Galaxies: “Dust and Grain Size Evolution in Galaxy Simulations: What Matters and What Does Not” by Massimiliano Parente & Desika Narayanan (U. Florida, USA) and Paul Torrey (U. Virginia, USA) presents the first implementation of an evolving dust grain size distribution within a model of galaxy evolution, successfully reproducing key observational constraints and exploring the mechanisms shaping galaxies.

The overlay is here:

The officially-accepted version of the paper can be found on arXiv here and the Fediverse announcement here:

https://fediscience.org/@OJ_Astro/117081036416703046

That’s all for this week. We’re just ticking over at the moment, and steadily building up a backlog of papers to publish while we wait for authors to put their final versions on arXiv. I have a feeling there’s going to be a big splurge sometime. Will it be next week? We’ll find out next Saturday!

Weekly Update from the Open Journal of Astrophysics 15/08/2026

Although it’s still holiday season for some, it’s time once more for another Saturday update of activity at the Open Journal of Astrophysics. Since the last update we have published a further four papers, bringing the number in Volume 9 (2026) to 171 and the total so far published by OJAp up to 619.

I continue to include the posts made on our Mastodon account (on Fediscience); these announcements also show the DOI for each paper.

The first paper to report this week was published on Monday 10th August in the folder High-Energy Astrophysical Phenomena. “Search for neutrino emission from blazar γ-ray flares accounting for possible neutrino time delays” by Egor Podlesny & Foteini Oikonomou (Norwegian University of Science & Technology, Trondheim, Norway) investigates high-energy neutrino emissions associated with blazar flares, using data from IceCat-1, MOJAVE, CGRaBS, and Fermi-LAT. A slight correlation was found, consistent with the null hypothesis.

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

https://fediscience.org/@OJ_Astro/117069981161677800

The second paper for this week, published on Tuesday 11th August in the folder Cosmology and Nongalactic Astrophysics is “The velocity coherence scale: a novel probe of cosmic homogeneity and a potential standard ruler” by Leonardo Giani (Swinburne University of Technology), Cullan Howlet (U. Queensland), Chris Blake (Swinburne), Ryan J. Turner (Australia National University) and Tamara M. Davis (U. Queensland) – all in Australia. This paper argues that velocity coherence scale, a measure that identifies the transition point of galaxy motion from correlated to anti-correlated, could potentially characterize the onset of cosmic homogeneity.

The overlay looks like this:

The official version of the paper can be found on arXiv here and the Fediverse announcement here:

https://fediscience.org/@OJ_Astro/117075588846174571

The third paper of the week, also published on Tuesday 11th Augus, but in the folder Astrophysics of Galaxies, is “A GLIMPSE of the 99%: a census of the faintest galaxies during the epoch of reionization and its implications for galaxy formation models” by Hakim Atek (Sorbonne Université, Paris, France) and 21 others based around the world.

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/117075737363441518

The fourth and final paper of the week was published on Wednesday 12th August in the folder Astrophysics of Galaxies: “Dust and Grain Size Evolution in Galaxy Simulations: What Matters and What Does Not” by Massimiliano Parente & Desika Narayanan (U. Florida, USA) and Paul Torrey (U. Virginia, USA) presents the first implementation of an evolving dust grain size distribution within a model of galaxy evolution, successfully reproducing key observational constraints and exploring the mechanisms shaping galaxies.

The overlay is here:

The officially-accepted version of the paper can be found on arXiv here and the Fediverse announcement here:

https://fediscience.org/@OJ_Astro/117081036416703046

That’s all for this week. We’re just ticking over at the moment, and steadily building up a backlog of papers to publish while we wait for authors to put their final versions on arXiv. I have a feeling there’s going to be a big splurge sometime. Will it be next week? We’ll find out next Saturday!

Weekly Update from the Open Journal of Astrophysics – 09/05/2026

It’s Saturday once again, so time for another update of activity at the Open Journal of Astrophysics. Since the last update we have published a further five papers, bringing the number in Volume 9 (2026) to 99 and the total so far published by OJAp up to 547. We didn’t quite make it to a hundred for the year last week, but will do so with the next paper.

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 announcements also show the DOI for each paper.

The first paper to report this week is “Formation of Close Binaries through Massive Black Hole Perturbations and Chaotic Tides” by Howard Hao-Tse Huang and Wenbin Lu (University of California at Berkeley, USA). This one was published on Wednesday 6th May 2026 in the folder Astrophysics of Galaxies. The paper presents a model of massive black hole-binary systems, showing that repeated tidal interactions can lead to the creation of hyper-velocity stars and other nuclear transients.

The overlay for this paper is here

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

https://fediscience.org/@OJ_Astro/116526323790020433

The second paper for this week, also Wednesday 6th May, but in the folder Cosmology and Nongalactic Astrophysics is “Detection of supernova magnitude fluctuations induced by large-scale structure” by Andrew Nguyen (Swinburne Institute of Technology, Australia) and 58 others based all around the world. This study uses supernovae and galaxy velocities to measure the universe’s structure growth rate, confirming the Planck LambdaCDM model prediction. The methodology is validated and shows potential for future research.

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/116526449130876366

Next one up, the third paper of the week, also published on Wednesday 6th May in the folder Cosmology and Nongalactic Astrophysics is “Comparing cosmic shear nulling methods for Stage-IV surveys” by Naomi Clare Robertson and Alex Hall (University of Edinburgh, UK). This study compares three strategies for reducing baryon feedback impact on cosmic shear measurements. All methods effectively mitigate bias, with varying degrees of efficiency and information preservation.

The overlay for this one is here:

The final, accepted version can be found on arXiv here and the Mastodon announcement is here:

https://fediscience.org/@OJ_Astro/116526251813375105

The fourth paper this week, published on Thursday May 7th, is “Egent: An Autonomous Agent for Equivalent Width Measurement” by Yuan-Sen Ting & Serat Mahmud Saad (Ohio State University, USA), Fan Liu (National Astronomical Observatories, Beijing, China), and Yuting Shen (Georgia Institute of Technology, USA). Egent is an autonomous agent that combines multi-Voigt profile fitting with large language model visual inspection for efficient, automated analysis of raw flux spectra, validated against expert measurements. This one is in the folder Instrumentation and Methods for Astrophysics. The associated software can be found here.

The overlay is here:

The officially accepted version can be found on arXiv here and here is the Mastodon announcement:

https://fediscience.org/@OJ_Astro/116531924397498394

The fifth and final article of this week was published on Friday 8th May in the folder Astrophysics of Galaxies. The title is “DiffstarPop: A generative physical model of galaxy star formation history” and it is by Alex Alarcon (Institute of Space Sciences, Barcelona, Spain), Andrew P. Hearin , Matthew R. Becker & Gillian Beltz-Mohrmann (Argonne National Laborarory, USA), and Andrew Benson & Sachi Weerasooriya (Carnegie Observatories, USA). DiffstarPop is a model that accurately and rapidly reproduces statistical distributions of galaxy star formation histories (SFH), using parameters related to galaxy formation physics.

The overlay is here:

You can find the authorized version of this paper on arXiv here and the Fediverse announcement is here:

https://fediscience.org/@OJ_Astro/116537709130989142

Here endeth this week’s update. There shall be another next Saturday.

P.S. Just a reminder that, thanks to the efforts of a member of our Editorial Board, the Open Journal of Astrophysics now has a Wikipedia page.

Weekly Update from the Open Journal of Astrophysics – 09/05/2026

It’s Saturday once again, so time for another update of activity at the Open Journal of Astrophysics. Since the last update we have published a further five papers, bringing the number in Volume 9 (2026) to 99 and the total so far published by OJAp up to 547. We didn’t quite make it to a hundred for the year last week, but will do so with the next paper.

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 announcements also show the DOI for each paper.

The first paper to report this week is “Formation of Close Binaries through Massive Black Hole Perturbations and Chaotic Tides” by Howard Hao-Tse Huang and Wenbin Lu (University of California at Berkeley, USA). This one was published on Wednesday 6th May 2026 in the folder Astrophysics of Galaxies. The paper presents a model of massive black hole-binary systems, showing that repeated tidal interactions can lead to the creation of hyper-velocity stars and other nuclear transients.

The overlay for this paper is here

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

https://fediscience.org/@OJ_Astro/116526323790020433

The second paper for this week, also Wednesday 6th May, but in the folder Cosmology and Nongalactic Astrophysics is “Detection of supernova magnitude fluctuations induced by large-scale structure” by Andrew Nguyen (Swinburne Institute of Technology, Australia) and 58 others based all around the world. This study uses supernovae and galaxy velocities to measure the universe’s structure growth rate, confirming the Planck LambdaCDM model prediction. The methodology is validated and shows potential for future research.

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/116526449130876366

Next one up, the third paper of the week, also published on Wednesday 6th May in the folder Cosmology and Nongalactic Astrophysics is “Comparing cosmic shear nulling methods for Stage-IV surveys” by Naomi Clare Robertson and Alex Hall (University of Edinburgh, UK). This study compares three strategies for reducing baryon feedback impact on cosmic shear measurements. All methods effectively mitigate bias, with varying degrees of efficiency and information preservation.

The overlay for this one is here:

The final, accepted version can be found on arXiv here and the Mastodon announcement is here:

https://fediscience.org/@OJ_Astro/116526251813375105

The fourth paper this week, published on Thursday May 7th, is “Egent: An Autonomous Agent for Equivalent Width Measurement” by Yuan-Sen Ting & Serat Mahmud Saad (Ohio State University, USA), Fan Liu (National Astronomical Observatories, Beijing, China), and Yuting Shen (Georgia Institute of Technology, USA). Egent is an autonomous agent that combines multi-Voigt profile fitting with large language model visual inspection for efficient, automated analysis of raw flux spectra, validated against expert measurements. This one is in the folder Instrumentation and Methods for Astrophysics. The associated software can be found here.

The overlay is here:

The officially accepted version can be found on arXiv here and here is the Mastodon announcement:

https://fediscience.org/@OJ_Astro/116531924397498394

The fifth and final article of this week was published on Friday 8th May in the folder Astrophysics of Galaxies. The title is “DiffstarPop: A generative physical model of galaxy star formation history” and it is by Alex Alarcon (Institute of Space Sciences, Barcelona, Spain), Andrew P. Hearin , Matthew R. Becker & Gillian Beltz-Mohrmann (Argonne National Laborarory, USA), and Andrew Benson & Sachi Weerasooriya (Carnegie Observatories, USA). DiffstarPop is a model that accurately and rapidly reproduces statistical distributions of galaxy star formation histories (SFH), using parameters related to galaxy formation physics.

The overlay is here:

You can find the authorized version of this paper on arXiv here and the Fediverse announcement is here:

https://fediscience.org/@OJ_Astro/116537709130989142

Here endeth this week’s update. There shall be another next Saturday.

P.S. Just a reminder that, thanks to the efforts of a member of our Editorial Board, the Open Journal of Astrophysics now has a Wikipedia page.

Why do some galaxies suddenly stop forming stars? Explore the cosmic mystery behind star formation shutdowns, uncovering clues about dark matter, gas depletion, and galactic evolution.
#CosmicMystery #GalaxyEvolution #StarFormation #UniverseSecrets
https://www.scientificworldinfo.com/2026/04/why-do-some-galaxies-stop-forming-stars-suddenly.html

COSMIC FOSSILS: NEW 'SPACE ARCHAEOLOGY' UNRAVELS GALAXY'S LONG STORY

Learn how scientists use 'extragalactic archaeology' to study the chemical makeup of gas in galaxy NGC 1365 to understand its 12-billion-year growth history.

#SpaceArchaeology, #GalaxyEvolution, #NGC1365, #Astronomy, #Extragalactic

https://newsletter.tf/space-archaeology-ngc-1365-galaxy-growth-story/

Scientists can now study galaxy history using chemical 'fingerprints' in gas. This is like finding ancient clues in space to see how galaxies like NGC 1365 grew over billions of years.

#SpaceArchaeology, #GalaxyEvolution, #NGC1365, #Astronomy, #Extragalactic
https://newsletter.tf/space-archaeology-ngc-1365-galaxy-growth-story/

JWST May Have Found the Universe’s First Pristine Galaxy

The James Webb Space Telescope may have uncovered one of the Universe’s first galaxies, AMORE6, almost devoid of…
#NewsBeep #News #Space #Astrophysics #AU #Australia #BigBang #Cosmology #GalaxyEvolution #Jameswebbspacetelescope #Science
https://www.newsbeep.com/au/116041/

The James Webb Space Telescope has captured a mysterious, never-before-seen formation nicknamed the Infinity Galaxy. This unique structure may provide clues about galaxy evolution in the early universe. Scientists are now studying its composition, structure, and impact on cosmological theories.

#spacediscovery #astronomy #jameswebbspacetelescope #infinitygalaxy #galaxyevolution

The James Webb Space Telescope has captured a mysterious, never-before-seen formation nicknamed the Infinity Galaxy. This unique structure may provide clues about galaxy evolution in the early universe. Scientists are now studying its composition, structure, and impact on cosmological theories.

#spacediscovery #astronomy #jameswebbspacetelescope #infinitygalaxy #galaxyevolution

A Sample of Galaxy Disks (NIRCam) ✨

#DistantGalaxies #Galaxies #GalaxyEvolution #SpiralGalaxies

▶️ 1 new picture from Webb (NASA) https://commons.wikimedia.org/wiki/File:A_Sample_of_Galaxy_Disks_%28NIRCam%29_%282025-121%29.png

A Sample of Galaxy Disks (NIRCam) ✨

#DistantGalaxies #Galaxies #GalaxyEvolution #SpiralGalaxies

▶️ 1 new picture from Webb (NASA) https://commons.wikimedia.org/wiki/File:A_Sample_of_Galaxy_Disks_%28NIRCam%29_%282025-121%29.png

Indian-origin scientist Dr. Ragadeepika Pucha at the University of Utah, has made a groundbreaking discovery in the study of black holes. Using data from the Dark KNOW MORE...https://blogzine2025.blogspot.com/2025/03/laser-focused-la-salle-green-spikers.html?m=1
#BlackHole #SpaceScience BlackHoleDiscovery #Astrophysics
#GalaxyEvolution #Galaxy #DwarfGalaxies #TEDTalks #TEDxGateway #IndianScientist

JADES Transient Survey (NIRCam Image) ✨

#Cosmology #DistantGalaxies #FirstGalaxies #Galaxies #GalaxyEvolution #GalaxyFormation

⏩ 2 new pictures from Webb (NASA) https://commons.wikimedia.org/wiki/Special:ListFiles?limit=4&user=OptimusPrimeBot&ilshowall=1&offset=20240611103226

JADES Transient Survey (NIRCam Image) ✨

#Cosmology #DistantGalaxies #FirstGalaxies #Galaxies #GalaxyEvolution #GalaxyFormation

⏩ 2 new pictures from Webb (NASA) https://commons.wikimedia.org/wiki/Special:ListFiles?limit=4&user=OptimusPrimeBot&ilshowall=1&offset=20240611103226

Galaxy JADES-GS-z14-0 Spectrum (NIRSpec) ✨

#DeepFields #DistantGalaxies #Galaxies #GalaxyEvolution #Survey

⏩ 2 new pictures from Webb (NASA) https://commons.wikimedia.org/wiki/Special:ListFiles?limit=4&user=OptimusPrimeBot&ilshowall=1&offset=20240531103252

Galaxy JADES-GS-z14-0 Spectrum (NIRSpec) ✨

#DeepFields #DistantGalaxies #Galaxies #GalaxyEvolution #Survey

⏩ 2 new pictures from Webb (NASA) https://commons.wikimedia.org/wiki/Special:ListFiles?limit=4&user=OptimusPrimeBot&ilshowall=1&offset=20240531103252

Galaxy Forming in the Early Universe (Artist’s Concept) ✨

#Cosmology #DistantGalaxies #FirstGalaxies #Galaxies #GalaxyEvolution #GalaxyFormation

▶️ 1 new picture from Webb (NASA) https://commons.wikimedia.org/wiki/File:Galaxy_Forming_in_the_Early_Universe_%28Artist%E2%80%99s_Concept%29_%282024-114%29.tiff

Galaxy Forming in the Early Universe (Artist’s Concept) ✨

#Cosmology #DistantGalaxies #FirstGalaxies #Galaxies #GalaxyEvolution #GalaxyFormation

▶️ 1 new picture from Webb (NASA) https://commons.wikimedia.org/wiki/File:Galaxy_Forming_in_the_Early_Universe_%28Artist%E2%80%99s_Concept%29_%282024-114%29.tiff

Monster galactic outflow powered by exploding stars - Enlarge / All galaxies have large amounts of gas that influence their s... - https://arstechnica.com/?p=2023554 #galaxyevolution #astrophysics #astronomy #science

Monster galactic outflow powered by exploding stars - Enlarge / All galaxies have large amounts of gas that influence their s... - https://arstechnica.com/?p=2023554 #galaxyevolution #astrophysics #astronomy #science

Portion of Cosmic Evolution Early Release Science (CEERS) Survey (NIRCam Compass Image) ✨

#DistantGalaxies #Galaxies #GalaxyEvolution #GalaxyFormation

⏩ 4 new pictures from Webb (NASA) https://commons.wikimedia.org/wiki/Special:ListFiles?limit=7&user=OptimusPrimeBot&ilshowall=1&offset=20240118103343

Portion of Cosmic Evolution Early Release Science (CEERS) Survey (NIRCam Compass Image) ✨

#DistantGalaxies #Galaxies #GalaxyEvolution #GalaxyFormation

⏩ 4 new pictures from Webb (NASA) https://commons.wikimedia.org/wiki/Special:ListFiles?limit=7&user=OptimusPrimeBot&ilshowall=1&offset=20240118103343

A new paper by Merrow et al. claims that, rather than a transient structure arising more recently through secular evolution, the Milky Way's bar may have resulted from its last major merger event some 8-11 Ga ago.

https://arxiv.org/abs/2312.02318

#Astronomy #Galaxies #MilkyWay #GalaxyEvolution

Cosmic Evolution Early Release Science (CEERS) Survey (NIRCam Compass Image) ✨

#ActiveGalaxies/Quasars #BlackHoles #DistantGalaxies #Galaxies #GalaxyEvolution #Miscellaneous #Observatories #Survey

⏩ 2 new pictures from Webb (NASA) https://commons.wikimedia.org/wiki/Special:ListFiles?limit=2&user=OptimusPrimeBot&ilshowall=1&offset=20231204105122

Cosmic Evolution Early Release Science (CEERS) Survey (NIRCam Compass Image) ✨

#ActiveGalaxies/Quasars #BlackHoles #DistantGalaxies #Galaxies #GalaxyEvolution #Miscellaneous #Observatories #Survey

⏩ 2 new pictures from Webb (NASA) https://commons.wikimedia.org/wiki/Special:ListFiles?limit=2&user=OptimusPrimeBot&ilshowall=1&offset=20231204105122

✨ 3 new pictures from Webb (NASA)
- El Gordo (NIRCam Compass Image)
- El Gordo (NIRCam Image)
- La Flaca and El Anzuelo (NIRCam Image)

#Cosmology #DistantGalaxies #Galaxies #GalaxyClusters #GalaxyEvolution #GravitationalLensing

⏩ https://commons.wikimedia.org/wiki/Special:ListFiles?limit=4&user=OptimusPrimeBot&ilshowall=1&offset=20230803103102

According to Simulations, the Milky Way is One in a Million https://www.universetoday.com/159754/according-to-simulations-the-milky-way-is-one-in-a-million/ #cosmologicalsimulation #galaxyevolution #milkywaygalaxy #illustristng #cosmicwall #cosmology #galaxies #milkyway #mass

Does anyone have a nice updated version of a "galaxies at different redshifts look different" graphic for 101-level? Preferably all images in the same rest frame band?
#Astronomy #Teaching #GalaxyEvolution #Redshift #Infrared

💫 ERC funded researchers @KU_Leuven and @HITStudies joined forces & discovered a dormant #blackhole 9x the mass of our ☀️ in a neighbouring galaxy - Large Magellanic Cloud.
Discover more:
👉 https://bit.ly/3AeoKvN
@CORDIS_EU
#astrophysics #cosmology #galaxyevolution #supernova

🐦🔗: https://nitter.eu/ERC_Research/status/1559521069173575680