#supernovae — Public Fediverse posts

Weekly Update from the Open Journal of Astrophysics 25/07/2026

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 nine papers, bringing the number in Volume 9 (2026) to 160 and the total so far published by OJAp up to 608.

I will 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 Tuesday 21st July in the folder Cosmology and Nongalactic Astrophysics. The title is “Characterization of the Polarization Beam Response of SPT-3G Using Point Sources” by Tijmen de Haan (Institute of Particle and Nuclear Studies, Ibaraki, Japan) and an international cast of 101 others. This study presents measurements of the South Pole Telescope’s polarized beam response, indicating minimal sidelobe depolarization. The findings suggest potential explanations for frequency-dependent residuals in power spectrum analysis.

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/116956682988048349

The second paper for this week, also published on Tuesday 21st July but in the folder Earth and Planetary Astrophysics is: “Exploring TRAPPIST-1 Climate States with an Energy Balance Model” by Jacob Haqq-Misra (Blue Marble Space, USA). The study uses a modified HEXTOR energy balance model to predict climate states of terrestrial planets orbiting low-mass stars, suggesting partial to complete ice cover for TRAPPIST-1 e and f.Abstractfor Exploring TRAPPIST-1 Climate States with an Energy Balance Model.

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/116956824712105776

The third paper of the week, also published on Tuesday 21st July, but in the folder Astrophysics of Galaxies is “A first systematic study of [OIII] 88μm at z>8: two luminous oxygen lines and a powerful ionized outflow in the first 600 million years” by Hiddo Algera (Institute of Astronomy and Astrophysics, Taipei, Taiwan) and 37 others from all around the world. This paper presents deep observations of four UV-bright, gravitationally lensed galaxies, revealing an ionized outflow in one and highlighting the diagnostic power of [O III]88 μm in studying galaxies in the early Universe.

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/116956879536002543

The fourth paper of the week, published on Thursday 23rd July in the folder Astrophysics of Galaxies, is “Mapping CO Ice in a Star-Forming Filament in the 3 kpc Arm with JWST” by Savannah Gramze (U. Florida, USA) and 16 others based all around the world. This paper shows that JWST observations and ALMA Band 3 data reveal that 50-88% of CO gas in a star-forming filament is locked in ice; corrections are needed for mass measurements in such systems.

The overlay for this one is here:

You can read the final version of this one on arXiv here and the Mastodon announcement is here:

https://fediscience.org/@OJ_Astro/116968030387635232

The fifth paper of the week, also published on Thursday 23rd July but in the folder High-Energy Astrophysical Phenomena, is “Viscously Spreading Accretion Disks around Black Holes: Implications for TDEs, LFBOTs and other Transients“. This article presents a time-dependent model of accretion disks around black holes, explaining late-time emission in tidal disruption events and luminous fast blue optical transients and future detectability of such events.

The overlay for this one is here:

You can read the final version of this one on arXiv here and the Mastodon announcement is here:

https://fediscience.org/@OJ_Astro/116968076410638262

The sixth paper of this week is “Characterising the response of an International LOFAR Station” by Letizia Vincetti (Trinity Collge Dublin, Ireland) and 9 others based in Ireland, USA, The Netherlands and Sweden. This was also published on Thursday July 23rd and is in the folder Instrumentation and Methods for Astrophysics. The article presents an investigation of the performance and calibration challenges of phased-array radio interferometers, using the Irish LOFAR station as a case study, highlighting the importance of accurate beam modelling, etc.

The overlay for this one is here:

You can find the final accepted version on arXiv here and the Mastodon announcement is here:

https://fediscience.org/@OJ_Astro/116968134127626260

The seventh paper of this week is “Exo Skryer: A JAX-accelerated sub-stellar atmospheric retrieval framework” by Elspeth K.H. Lee (U. Bern, Switzerland). Published on Friday 24th July in the folder Earth and Planetary Astrophysics, this article introduces “Exo Skryer”, a new, efficient framework for exoplanet and brown dwarf atmospheric research, capable of handling large data sets and complex models.

The overlay for this one is here:

You can find the final accepted version on arXiv here and the Mastodon announcement is here:

https://fediscience.org/@OJ_Astro/116974013616759329

The (penultimate) eighth paper of this week is “GCR Spectra Reconstructed with Neutron Monitor Yield Function and Artificial Neural Networks: Comparison of Two Methods” by Stepan A. Siruk (Moscow Engineering Physics Institute MEPhI, Russia) and four others, all based in Russia. Published on Friday 24th July in the folder Instrumentation and Methods for Astrophysics, this article presents a framework using artificial neural networks and neutron monitors to reconstruct cosmic-ray energy spectra, providing data even in the absence of direct satellite observations.

The overlay for this one is here:

You can find the final accepted version on arXiv here and the Mastodon announcement is here:

https://fediscience.org/@OJ_Astro/116974048321854911

And finally for this week we have “The failed failed-supernova scenario of M31-2014-DS1” by Noam Soker (Technion, Israel), a paper which challenges the failed-supernova theory for the fading of the yellow supergiant event M31-2014-DS1, suggesting it requires unlikely parameters and supports an alternative scenario involving violent binary interaction. This was published on Friday 24th July in the folder High-Energy Astrophysical Phenomena.

The overlay for this one is here:

You can find the final accepted version on arXiv here and the Mastodon announcement is here:

https://fediscience.org/@OJ_Astro/116974082942533765

And that concludes the update of this week’s business. As it was foretold, the total number of publications at OJAp has now passed the 600 mark, and the likely number for 2026 is around 300. We published a paper in five of the six astro-ph categories this week, but still haven’t had a week when we’ve published a full house with at least one in all six…

Weekly Update from the Open Journal of Astrophysics 25/07/2026

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 nine papers, bringing the number in Volume 9 (2026) to 160 and the total so far published by OJAp up to 608.

I will 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 Tuesday 21st July in the folder Cosmology and Nongalactic Astrophysics. The title is “Characterization of the Polarization Beam Response of SPT-3G Using Point Sources” by Tijmen de Haan (Institute of Particle and Nuclear Studies, Ibaraki, Japan) and an international cast of 101 others. This study presents measurements of the South Pole Telescope’s polarized beam response, indicating minimal sidelobe depolarization. The findings suggest potential explanations for frequency-dependent residuals in power spectrum analysis.

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/116956682988048349

The second paper for this week, also published on Tuesday 21st July but in the folder Earth and Planetary Astrophysics is: “Exploring TRAPPIST-1 Climate States with an Energy Balance Model” by Jacob Haqq-Misra (Blue Marble Space, USA). The study uses a modified HEXTOR energy balance model to predict climate states of terrestrial planets orbiting low-mass stars, suggesting partial to complete ice cover for TRAPPIST-1 e and f.Abstractfor Exploring TRAPPIST-1 Climate States with an Energy Balance Model.

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/116956824712105776

The third paper of the week, also published on Tuesday 21st July, but in the folder Astrophysics of Galaxies is “A first systematic study of [OIII] 88μm at z>8: two luminous oxygen lines and a powerful ionized outflow in the first 600 million years” by Hiddo Algera (Institute of Astronomy and Astrophysics, Taipei, Taiwan) and 37 others from all around the world. This paper presents deep observations of four UV-bright, gravitationally lensed galaxies, revealing an ionized outflow in one and highlighting the diagnostic power of [O III]88 μm in studying galaxies in the early Universe.

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/116956879536002543

The fourth paper of the week, published on Thursday 23rd July in the folder Astrophysics of Galaxies, is “Mapping CO Ice in a Star-Forming Filament in the 3 kpc Arm with JWST” by Savannah Gramze (U. Florida, USA) and 16 others based all around the world. This paper shows that JWST observations and ALMA Band 3 data reveal that 50-88% of CO gas in a star-forming filament is locked in ice; corrections are needed for mass measurements in such systems.

The overlay for this one is here:

You can read the final version of this one on arXiv here and the Mastodon announcement is here:

https://fediscience.org/@OJ_Astro/116968030387635232

The fifth paper of the week, also published on Thursday 23rd July but in the folder High-Energy Astrophysical Phenomena, is “Viscously Spreading Accretion Disks around Black Holes: Implications for TDEs, LFBOTs and other Transients“. This article presents a time-dependent model of accretion disks around black holes, explaining late-time emission in tidal disruption events and luminous fast blue optical transients and future detectability of such events.

The overlay for this one is here:

You can read the final version of this one on arXiv here and the Mastodon announcement is here:

https://fediscience.org/@OJ_Astro/116968076410638262

The sixth paper of this week is “Characterising the response of an International LOFAR Station” by Letizia Vincetti (Trinity Collge Dublin, Ireland) and 9 others based in Ireland, USA, The Netherlands and Sweden. This was also published on Thursday July 23rd and is in the folder Instrumentation and Methods for Astrophysics. The article presents an investigation of the performance and calibration challenges of phased-array radio interferometers, using the Irish LOFAR station as a case study, highlighting the importance of accurate beam modelling, etc.

The overlay for this one is here:

You can find the final accepted version on arXiv here and the Mastodon announcement is here:

https://fediscience.org/@OJ_Astro/116968134127626260

The seventh paper of this week is “Exo Skryer: A JAX-accelerated sub-stellar atmospheric retrieval framework” by Elspeth K.H. Lee (U. Bern, Switzerland). Published on Friday 24th July in the folder Earth and Planetary Astrophysics, this article introduces “Exo Skryer”, a new, efficient framework for exoplanet and brown dwarf atmospheric research, capable of handling large data sets and complex models.

The overlay for this one is here:

You can find the final accepted version on arXiv here and the Mastodon announcement is here:

https://fediscience.org/@OJ_Astro/116974013616759329

The (penultimate) eighth paper of this week is “GCR Spectra Reconstructed with Neutron Monitor Yield Function and Artificial Neural Networks: Comparison of Two Methods” by Stepan A. Siruk (Moscow Engineering Physics Institute MEPhI, Russia) and four others, all based in Russia. Published on Friday 24th July in the folder Instrumentation and Methods for Astrophysics, this article presents a framework using artificial neural networks and neutron monitors to reconstruct cosmic-ray energy spectra, providing data even in the absence of direct satellite observations.

The overlay for this one is here:

You can find the final accepted version on arXiv here and the Mastodon announcement is here:

https://fediscience.org/@OJ_Astro/116974048321854911

And finally for this week we have “The failed failed-supernova scenario of M31-2014-DS1” by Noam Soker (Technion, Israel), a paper which challenges the failed-supernova theory for the fading of the yellow supergiant event M31-2014-DS1, suggesting it requires unlikely parameters and supports an alternative scenario involving violent binary interaction. This was published on Friday 24th July in the folder High-Energy Astrophysical Phenomena.

The overlay for this one is here:

You can find the final accepted version on arXiv here and the Mastodon announcement is here:

https://fediscience.org/@OJ_Astro/116974082942533765

And that concludes the update of this week’s business. As it was foretold, the total number of publications at OJAp has now passed the 600 mark, and the likely number for 2026 is around 300. We published a paper in five of the six astro-ph categories this week, but still haven’t had a week when we’ve published a full house with at least one in all six…

Un ultimo ballo prima della morte: le stelle binarie e le origini delle supernove interagenti

#supernovae @[email protected]
@[email protected]

Quando le stelle massicce muoiono, scatenano alcune delle esplosioni più potenti dell'universo. Eppure, non tutte le supernovae sono uguali. Alcune continuano a brillare intensamente per mesi o addirittura anni, mentre i loro detriti in espansione si scontrano con dense nubi di gas che circondano la stella....

https://umbertogaetani.substack.com/p/un-ultimo-ballo-prima-della-morte

New in the #VirtualObservatory: “SN 2021lwz light curves” by Poidevin F. et al.
https://cdsarc.cds.unistra.fr/viz-bin/cat/J/A+A/710/A367
#VisibleAstronomy #Photometry #Supernovae #UltravioletAstronomy

New in the #VirtualObservatory: “Photometric observations of SN 2024iss” by Chen L. et al.
https://cdsarc.cds.unistra.fr/viz-bin/cat/J/A+A/710/A33
#SloanPhotometry #Supernovae #VisibleAstronomy #BroadBandPhotometry

New in the #VirtualObservatory: “SN 2017ati light curves” by Peng Z.-H. et al.
https://cdsarc.cds.unistra.fr/viz-bin/cat/J/A+A/709/A156
#Supernovae #SloanPhotometry #VisibleAstronomy

Gamma-ray signature of superluminous supernovae: Fermi-LAT GeV detection of SN 2017egm and evidence of a central engine: https://www.aanda.org/articles/aa/full_html/2026/05/aa58547-25/aa58547-25.html -> NASA’s Fermi Glimpses Power Source of Supercharged #Supernovae: https://science.nasa.gov/missions/fermi/nasas-fermi-glimpses-power-source-of-supercharged-supernovae/

Gamma-ray signature of superluminous supernovae: Fermi-LAT GeV detection of SN 2017egm and evidence of a central engine: https://www.aanda.org/articles/aa/full_html/2026/05/aa58547-25/aa58547-25.html -> NASA’s Fermi Glimpses Power Source of Supercharged #Supernovae: https://science.nasa.gov/missions/fermi/nasas-fermi-glimpses-power-source-of-supercharged-supernovae/

Fermi individua il motore nascosto dietro le supernove superluminose

#fermi #supernovae superluminose
@astronomia

Nuove osservazioni nei raggi gamma effettuate dal telescopio spaziale Fermi suggeriscono che le stelle di neutroni ultramagnetiche, note come magnetar, potrebbero alimentare le supernove superluminose, una rara categoria di esplosioni stellari con luminosità di picco da 10 a 100 volte superiori a quelle delle supernove standard da collasso del nucleo.

https://umbertogaetani.substack.com/p/fermi-individua-il-motore-nascosto

Fermi individua il motore nascosto dietro le supernove superluminose

#fermi #supernovae superluminose
@astronomia

Nuove osservazioni nei raggi gamma effettuate dal telescopio spaziale Fermi suggeriscono che le stelle di neutroni ultramagnetiche, note come magnetar, potrebbero alimentare le supernove superluminose, una rara categoria di esplosioni stellari con luminosità di picco da 10 a 100 volte superiori a quelle delle supernove standard da collasso del nucleo.

https://umbertogaetani.substack.com/p/fermi-individua-il-motore-nascosto

New in the #VirtualObservatory: “AST3-2 SN point source automatic survey” by Yang X. et al.
https://cdsarc.cds.unistra.fr/viz-bin/cat/J/MNRAS/520/5635
#Supernovae #Photometry #Astrometry #Exoplanets

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.

New in the #VirtualObservatory: “SN 2020lao light curves” by Stritzinger M.D. et al.
https://cdsarc.cds.unistra.fr/viz-bin/cat/J/A+A/708/A305
#Supernovae #Photometry #VisibleAstronomy

New in the #VirtualObservatory: “Characterization of type Ibn SNe” by Farias D. et al.
https://cdsarc.cds.unistra.fr/viz-bin/cat/J/A+A/708/A270
#Photometry #VisibleAstronomy #Supernovae #UltravioletAstronomy

New in the #VirtualObservatory: “THU SESNe spectra” by Xiang D. et al.
https://cdsarc.cds.unistra.fr/viz-bin/cat/J/A+A/708/A267
#Spectroscopy #Supernovae

New in the #VirtualObservatory: “Multiwavelength photometry of SN 2022xkq” by Pearson J. et al.
https://cdsarc.cds.unistra.fr/viz-bin/cat/J/ApJ/960/29
#VisibleAstronomy #Supernovae #UltravioletPhotometry #BroadBandPhotometry

Weekly Update from the Open Journal of Astrophysics – 04/04/2026

It may be the Easter weekend, but it’s still time for a Saturday morning 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 71 and the total so far published by OJAp up to 519. This update coimpletes the first quarter of 2026, which suggests that if we continue to publish at the same rate we’ll reach about 280 for the year.

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 “Testing halo models for constraining astrophysical feedback with multi-probe modeling: I. 3D Power spectra and mass fractions” by Pranjal R. S. (U. Arizona, USA), Shivam Pandey Johns Hopkins U., USA), Dhayaa Anbajagane (U. Chicago, USA), Elisabeth Krause (U. Arizona) and Klaus Dolag (Max Planck Institute for Astrophysics, Germany). This paper was published on Tuesday March 31st in the folder Cosmology and Nongalactic 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/116322295318460212

The second paper for this week, also published on Tuesday March 31st in the folder Cosmology and Nongalactic Astrophysics, is “Validation of the DESI-DR1 3×2-pt analysis: scale cut and shear ratio tests” by Ni Putu Audita Placida Emas (Swinburne University of Technology, Australia) and an international cast of 56 others. This study validates the combined analysis of galaxy clustering and weak gravitational lensing data from various surveys, ensuring accurate tests of the standard cosmological model using future Stage-IV surveys

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/116322348900996677

Next one up, the third paper of the week, also published on Tuesday March 31st in the folder Cosmology and Nongalactic Astrophysics, is “Differentiable Stochastic Halo Occupation Distribution with Galaxy Intrinsic Alignments” by Sneh Pandya and Jonathan Blazek (both of Northeastern University, USA). This is a paper introducing diffHOD-IA, a differentiable model for galaxy population analysis that incorporates intrinsic alignments and halo occupation distribution. It’s validated against existing models and can be used in next-generation weak-lensing analyses.

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/116322403314492269

The fourth and final paper this week, published on Wednesday April 1st (but not a joke), is “The Growth of Dust in Galaxies in the First Billion Years with Applications to Blue Monsters” by Desika Narayanan (U. Florida, USA) and 11 others based in the USA and Europe. This one is in the folder Astrophysics of Galaxies; it presents a simulation-based study of dust accumulation in early galaxies via supernovae production and rapid growth on tiny dust grains, with local density and grain size being important factors.

The overlay is here:

The finally accepted version of this paper can be found here and the Mastodon announcement is here:

https://fediscience.org/@OJ_Astro/116328145696781139

And that concludes the update for this week. I’ll do another next week, but I’m expecting a fairly low number of papers owing to the Easter vacation.

Weekly Update from the Open Journal of Astrophysics – 04/04/2026

It may be the Easter weekend, but it’s still time for a Saturday morning 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 71 and the total so far published by OJAp up to 519. This update coimpletes the first quarter of 2026, which suggests that if we continue to publish at the same rate we’ll reach about 280 for the year.

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 “Testing halo models for constraining astrophysical feedback with multi-probe modeling: I. 3D Power spectra and mass fractions” by Pranjal R. S. (U. Arizona, USA), Shivam Pandey Johns Hopkins U., USA), Dhayaa Anbajagane (U. Chicago, USA), Elisabeth Krause (U. Arizona) and Klaus Dolag (Max Planck Institute for Astrophysics, Germany). This paper was published on Tuesday March 31st in the folder Cosmology and Nongalactic 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/116322295318460212

The second paper for this week, also published on Tuesday March 31st in the folder Cosmology and Nongalactic Astrophysics, is “Validation of the DESI-DR1 3×2-pt analysis: scale cut and shear ratio tests” by Ni Putu Audita Placida Emas (Swinburne University of Technology, Australia) and an international cast of 56 others. This study validates the combined analysis of galaxy clustering and weak gravitational lensing data from various surveys, ensuring accurate tests of the standard cosmological model using future Stage-IV surveys

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/116322348900996677

Next one up, the third paper of the week, also published on Tuesday March 31st in the folder Cosmology and Nongalactic Astrophysics, is “Differentiable Stochastic Halo Occupation Distribution with Galaxy Intrinsic Alignments” by Sneh Pandya and Jonathan Blazek (both of Northeastern University, USA). This is a paper introducing diffHOD-IA, a differentiable model for galaxy population analysis that incorporates intrinsic alignments and halo occupation distribution. It’s validated against existing models and can be used in next-generation weak-lensing analyses.

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/116322403314492269

The fourth and final paper this week, published on Wednesday April 1st (but not a joke), is “The Growth of Dust in Galaxies in the First Billion Years with Applications to Blue Monsters” by Desika Narayanan (U. Florida, USA) and 11 others based in the USA and Europe. This one is in the folder Astrophysics of Galaxies; it presents a simulation-based study of dust accumulation in early galaxies via supernovae production and rapid growth on tiny dust grains, with local density and grain size being important factors.

The overlay is here:

The finally accepted version of this paper can be found here and the Mastodon announcement is here:

https://fediscience.org/@OJ_Astro/116328145696781139

And that concludes the update for this week. I’ll do another next week, but I’m expecting a fairly low number of papers owing to the Easter vacation.

La rara supernova di tipo Icn SN 2024abvb è tra le più luminose conosciute

#supernovae @astronomia

Un team internazionale di astronomi ha effettuato osservazioni fotometriche e spettroscopiche di SN 2024abvb, una supernova recentemente scoperta appartenente al raro tipo Icn. La nuova campagna osservativa fornisce informazioni importanti sulle proprietà e sulla natura di questa supernova.

https://umbertogaetani.substack.com/p/la-rara-supernova-di-tipo-icn-sn

New in the #VirtualObservatory: “type Ia Supernova ASNOS sample” by Phan K. et al.
https://cdsarc.cds.unistra.fr/viz-bin/cat/J/A+A/706/A348
#Supernovae #InfraredPhotometry #VisibleAstronomy

New in the #VirtualObservatory: “ZTF SN Ia DR2 follow-up” by Alburai A. et al.
https://cdsarc.cds.unistra.fr/viz-bin/cat/J/A+A/707/A91
#Supernovae #Photometry #VisibleAstronomy #Spectroscopy

New in the #VirtualObservatory: “Photometry of 6 SN 2009ip-like supernovae” by Salmaso I. et al.
https://cdsarc.cds.unistra.fr/viz-bin/cat/J/A+A/707/A80
#Supernovae #Photometry #VisibleAstronomy

Cosa succede all'interno di una stella massiccia prima che esploda come una supernova?

#astrofisica @astronomia
#supernovae

I ricercatori hanno ricostruito gran parte dei complessi dettagli che stanno dietro alle supernovae di tipo II. Tuttavia gli astrofisici hanno ancora alcune domande aperte. Una di queste riguarda gli inviluppi estesi delle stelle progenitrici e le loro curve di luce.

https://umbertogaetani.substack.com/p/cosa-succede-allinterno-di-una-stella

La supernova SN 2024abfl, scoperta di recente, è una supernova di tipo IIP a bassa luminosità, secondo quanto scoperto dagli astronomi

#supernovae @astronomia

Un team internazionale di astronomi ha condotto osservazioni fotometriche e spettroscopiche di una supernova recentemente scoperta, denominata SN 2024abfl. I risultati orniscono importanti informazioni sulle proprietà di questa esplosione stellare.

https://umbertogaetani.substack.com/p/la-supernova-sn-2024abfl-scoperta

New in the #VirtualObservatory: “SN 2022ngb light curves” by Zhao J.-W. et al.
https://cdsarc.cds.unistra.fr/viz-bin/cat/J/A+A/706/A271
#VisibleAstronomy #Supernovae #Photometry #InfraredAstronomy

New in the #VirtualObservatory: “PS1-MDS supernovae classifications” by Villar V.A. et al.
https://cdsarc.cds.unistra.fr/viz-bin/cat/J/ApJS/276/3
#Photometry #Supernovae #StellarSpectralTypes

Supernovae come in two types. Core-collapse supernovae result from massive stars exhausting fuel. Thermonuclear supernovae are triggered by white dwarfs accreting mass or merging. Both produce expanding SNRs that can leave neutron stars or black holes.

#Supernovae #StellarEvolution #NASA

Supernovae come in two types. Core-collapse supernovae result from massive stars exhausting fuel. Thermonuclear supernovae are triggered by white dwarfs accreting mass or merging. Both produce expanding SNRs that can leave neutron stars or black holes.

#Supernovae #StellarEvolution #NASA

NASA’s Webb Telescope Locates Former Star That Exploded as Supernova https://science.nasa.gov/missions/webb/nasas-webb-telescope-locates-former-star-that-exploded-as-supernova/ #NASA #Astrophysics #GoddardSpaceFlightCenter #JamesWebbSpaceTelescopeJWST #ScienceResearch #SpiralGalaxies #Stars #Supernovae #TheUniverse

NASA’s Webb Telescope Locates Former Star That Exploded as Supernova https://science.nasa.gov/missions/webb/nasas-webb-telescope-locates-former-star-that-exploded-as-supernova/ #NASA #Astrophysics #GoddardSpaceFlightCenter #JamesWebbSpaceTelescopeJWST #ScienceResearch #SpiralGalaxies #Stars #Supernovae #TheUniverse

New in the #VirtualObservatory: “SN 2021efd, SN 2019tsf photometry and spectra” by Pyykkinen N. et al.
https://cdsarc.cds.unistra.fr/viz-bin/cat/J/A+A/706/A183
#Spectroscopy #VisibleAstronomy #Supernovae #Photometry

New in the #VirtualObservatory: “Long-term sp. obs. of SN IIb/Ib 2022crv” by Gangopadhyay A. et al.
https://cdsarc.cds.unistra.fr/viz-bin/cat/J/ApJ/957/100
#Spectroscopy #Supernovae #VisibleAstronomy

New in the #VirtualObservatory: “TESS 4yrs obs. of Type Ia supernovae” by Fausnaugh M.M. et al.
https://cdsarc.cds.unistra.fr/viz-bin/cat/J/ApJ/956/108
#Supernovae #Photometry #VisibleAstronomy #AbsoluteMagnitude

The MARK16 / Bubbleverse model has now been tested against all major probes:
H(z), SNe, BAO, and Planck 2018 CMB distance priors.

Using a hybrid setup, late-time expansion is modified while early-universe physics remains standard.

Details and code:
https://bubbleverse.dk

#cosmology #CMB #BAO #Supernovae #Bubbleverse

New in the #VirtualObservatory: “TESS early light curves of type Ia Supernovae” by Fausnaugh M.M. et al.
https://cdsarc.cds.unistra.fr/viz-bin/cat/J/ApJ/908/51
#VisibleAstronomy #InfraredPhotometry #Supernovae #Photometry

Il video dei resti di una supernova realizzato dal telescopio Chandra della NASA è frutto di decenni di lavoro

#chandra #supernovae @astronomia

Questo nuovo video include dati X raccolti nel 2000, 2004, 2006, 2014 e 2025. Si tratta quindi del video con l’arco temporale più lungo mai pubblicato da Chandra, reso possibile dalla sua eccezionale longevità.

https://umbertogaetani.substack.com/p/il-video-dei-resti-di-una-supernova

New in the #VirtualObservatory: “The iron yield of core-collapse supernovae” by Rodriguez O. et al.
https://cdsarc.cds.unistra.fr/viz-bin/cat/J/ApJ/955/71
#Supernovae #InfraredPhotometry #VisibleAstronomy #BroadBandPhotometry

NASA-JAXA XRISM Finds Elemental Bounty in Supernova Remnant https://science.nasa.gov/missions/xrism/nasa-jaxa-xrism-finds-elemental-bounty-in-supernova-remnant/ #NASA #Astrophysics #ChandraXRayObservatory #GalaxiesStarsBlackHolesResearch #GoddardSpaceFlightCenter #Stars #SupernovaRemnants #Supernovae #TheUniverse #XRayAstronomy #XRISMXRayImagingAndSpectroscopyMission

NASA-JAXA XRISM Finds Elemental Bounty in Supernova Remnant

https://web.brid.gy/r/https://science.nasa.gov/missions/xrism/nasa-jaxa-xrism-finds-elemental-bounty-in-supernova-remnant/

In Pics: NASA’s James Webb Space Telescope Spotted A Red Supergiant That Went Supernova And Other Space Photos

https://web.brid.gy/r/https://in.mashable.com/science/101101/in-pics-nasas-james-webb-space-telescope-spotted-a-red-supergiant-that-went-supernova-and-other-spac

New Arabic records from Cairo on #supernovae 1181 and 1006: https://arxiv.org/abs/2509.04127 -> Arab Scholars May Have Noted the Supernovae of 1006 and 1181: https://www.universetoday.com/articles/arab-scholars-may-have-noted-the-supernovae-of-1006-and-1181

Primordial #BlackHoles Could Be Triggering Type Ia #Supernovae

https://www.universetoday.com/articles/primordial-black-holes-could-be-triggering-type-ia-supernovae

Near-Earth supernova (Earth 🌍)

A near-Earth supernova is an explosion resulting from the death of a star that occurs close enough to the Earth, less than roughly 10 to 300 parsecs away, to have noticeable effects on its biosphere. An estimated 20 supernova explosions have happened within 300 pc of the Earth over the last 11 million years. Type II supernova explosions are ...

https://en.wikipedia.org/wiki/Near-Earth_supernova

#NearEarthSupernova #Earth #Supernovae #SpaceHazards #CosmicDoomsday

The ATLAS Virtual Research Assistant: https://iopscience.iop.org/article/10.3847/1538-4357/adf2a1 -> AI tool developed at Oxford helps astronomers find #supernovae in a sky full of noise: https://www.eurekalert.org/news-releases/1097443

NASA’s Chandra Reveals Star’s Inner Conflict Before Explosion https://www.nasa.gov/missions/chandra/nasas-chandra-reveals-stars-inner-conflict-before-explosion/ #NASA #ChandraXRayObservatory #General #MarshallAstrophysics #MarshallSpaceFlightCenter #SupernovaRemnants #Supernovae #TheUniverse

NASA Roman Core Survey Will Trace Cosmic Expansion Over Time

NASA’s Nancy Grace Roman Space Telescope will be a discovery machine, thanks to its wide field of view…
#NewsBeep #News #Space #DarkEnergy #NancyGraceRomanSpaceTelescope #NeutronStars #Science #stars #Supernovae #TheUniverse #UK #UnitedKingdom
https://www.newsbeep.com/uk/62907/

NASA Roman Core Survey Will Trace Cosmic Expansion Over Time https://www.nasa.gov/missions/roman-space-telescope/nasa-roman-core-survey-will-trace-cosmic-expansion-over-time/ #NASA #NancyGraceRomanSpaceTelescope #DarkEnergy #NeutronStars #Stars #Supernovae #TheUniverse

New evidence that some #supernovae may be a “double detonation”
A hypothesis that doesn't require as much mass: a relatively small explosion on a #whitedwarf's surface can compress the interior enough to restart fusion in #stars that haven't yet reached a critical mass. Now, observations of the remains of a #supernova provide some evidence of the existence of these so-called "double detonation" supernovae.
https://arstechnica.com/science/2025/07/new-evidence-that-some-supernovae-may-be-a-double-detonation/

A mere 55 million light-years away in the Virgo Cluster of Galaxies, M61 is also known as NGC 4303. It's considered to be an example of a barred spiral galaxy similar to our own #MilkyWay.

Messier 61 holds the record for the most #Supernovae observed in any Messier object, with at least eight recorded.

https://en.wikipedia.org/wiki/Messier_61

One Survey by NASA’s Roman Could Unveil 100,000 Cosmic Explosions https://www.nasa.gov/missions/roman-space-telescope/one-survey-by-nasas-roman-could-unveil-100000-cosmic-explosions/ #NASA #NancyGraceRomanSpaceTelescope #Astrophysics #BlackHoles #DarkEnergy #GalaxiesStarsBlackHoles #GalaxiesStarsBlackHolesResearch #GoddardSpaceFlightCenter #ScienceResearch #Stars #Supernovae #TheUniverse