#astrophysicsofgalaxies — Public Fediverse posts

Weekly Update from the Open Journal of Astrophysics 12/09/2026

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 seven papers, bringing the number in Volume 9 (2026) to 202 and the total so far published by OJAp up to 649. This means that the total in Vol. 9 (2026) has now passed that of Vol. 8 (2025), with more than three months to go.

I continue to include the posts made on our Mastodon account (on Fediscience); these announcements also contain a clickable form of the DOI for each paper. Our Mastodon account has regular updates and other announcements from OJAp too.

The first paper this week was published on Monday 7th September in the folder Astrophysics of Galaxies. The title is “Not all cores are equal: Phase-space origins of dynamical friction, stalling and buoyancy” and the authors are Shashank Dattathri & Frank C. van den Bosch (Yale U., USA), Uddipan Banik (Princeton U., USA), Martin Weinberg (U. Mass., USA), Priyamvada Natarajan (Yale U., USA), Zhaozhou Li (Nanjing U., China) and Avishai Dekel (The Hebrew U., Israel). The paper describes how the distribution function of a galaxy, not just its central density gradient, influences the efficiency and direction of dynamical friction, affecting the movement of massive objects within it.

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/117228580379311271

The second paper for this week, also published on Monday 7th September, but in the folder Earth and Planetary Astrophysics, is “The Third Option: Color Phase Curves to Characterize the Atmospheres of Temperate Rocky Exoplanets” by Drake Deming (U. Maryland, USA) and 8 others based in the USA, Germany and The Netherlands. This article presents a A spectroscopic survey of the Carousel lens galaxy cluster, identifying 12 lensed sources and 57 unlensed field galaxies. The findings could help constrain cosmological parameters and cluster properties.

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/117228634584835048

The third paper of the week, also published on Monday 7th September but in the folder High-Energy Astrophysical Phenomena, is “Dependences of radio pulsar parameters on the kick velocity” by Anton D. Lazarev and Sergei B. Popov (Moscow State U., Russia). This study analyzes the velocity kick of neutron stars, finding that 23% belong to the low-velocity mode. Differences in magnetic field distribution emerge, but no significant bimodality in physical parameters.

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/117228716672955417

The fourth paper of the week is “A Dusty Quenching-Candidate AGN host at z=5.7: massive quiescent galaxies may quench already during the dust-obscured phase” by Francesco D’Eugenio (U. Cambridge, UK) and 14 others from the UK, Italy, China and The Netherlands. It was published on Wednesday 8th September in the folder Astrophysics of Galaxies. This article concerns RUBIES-EGS-9809, a dust-reddened galaxy with a dominant point-source component, suggests that AGN feedback may influence its host., indicating that massive galaxies can host evolved stellar populations during their dust-obscured phase.

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/117240213971385314

The fifth paper of the week is “The Carousel Lens I: A Spectroscopic Survey of the Carousel Lens Field” by Jackson H. O’Donnell (U.C. Santa Cruz, USA) and 22 others from around the world. This was published in the folder Astrophysics of Galaxies on Thursday 10th September 2026. This paper presents a spectroscopic survey of the Carousel lens galaxy cluster, identifying 12 lensed sources and 57 unlensed field galaxies. The findings could help constrain cosmological parameters and cluster properties.

The overlay for this one looks like this:

The officially-accepted version of this paper is on arXiv here and the Mastodon announcement on the fediverse here:

https://fediscience.org/@OJ_Astro/117245758277502000

The penultimate, sixth, paper of the week is “No Gravitational Anomaly in Wide Binaries from Forward Modeling of 3D Orbits” by Serat M. Saad and Yuan-Sen Ting (Ohio State U., USA). This was also published on Thursday 10th September, but in the folder Solar and Stellar Astrophysics. The study reanalyzes a dataset on gravitational anomalies, finding results consistent with Newtonian gravity, contrary to previous findings that suggested Modified Newtonian Dynamics. The overlay for this one is here:

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

https://fediscience.org/@OJ_Astro/117245834036376367

Last but by no means least we have “The quenching time and timescale distribution of z~2 quiescent galaxies from precise colour distribution analysis” by Vivienne Wild (U. St Andrews, UK), Ho-Hin Leung & Adam Carnal (U. Edinburgh, UK) and Maya Skarbinski (Johns Hopkins U., USA). This paper was published on Thursday 10th September in the folder Astrophysics of Galaxies. It describes a study that uses simulation-based inference to analyze galaxy formation and quenching times, revealing that galaxies must quench rapidly post-Big Bang to achieve a specific color distribution.

The overlay is here:

The final version of this paper is on the arXiv here and the Mastodon announcement here:

https://fediscience.org/@OJ_Astro/117245909777322846

It is worth mentioning that there was one deferred arXiv mailing this week, due to the Labor Day holiday in the USA, so some papers were therefore published a day later than usual.

That concludes this week’s update. I’ll do another next weekend.

Weekly Update from the Open Journal of Astrophysics 12/09/2026

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 seven papers, bringing the number in Volume 9 (2026) to 202 and the total so far published by OJAp up to 649. This means that the total in Vol. 9 (2026) has now passed that of Vol. 8 (2025), with more than three months to go.

I continue to include the posts made on our Mastodon account (on Fediscience); these announcements also contain a clickable form of the DOI for each paper. Our Mastodon account has regular updates and other announcements from OJAp too.

The first paper this week was published on Monday 7th September in the folder Astrophysics of Galaxies. The title is “Not all cores are equal: Phase-space origins of dynamical friction, stalling and buoyancy” and the authors are Shashank Dattathri & Frank C. van den Bosch (Yale U., USA), Uddipan Banik (Princeton U., USA), Martin Weinberg (U. Mass., USA), Priyamvada Natarajan (Yale U., USA), Zhaozhou Li (Nanjing U., China) and Avishai Dekel (The Hebrew U., Israel). The paper describes how the distribution function of a galaxy, not just its central density gradient, influences the efficiency and direction of dynamical friction, affecting the movement of massive objects within it.

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/117228580379311271

The second paper for this week, also published on Monday 7th September, but in the folder Earth and Planetary Astrophysics, is “The Third Option: Color Phase Curves to Characterize the Atmospheres of Temperate Rocky Exoplanets” by Drake Deming (U. Maryland, USA) and 8 others based in the USA, Germany and The Netherlands. This article presents a A spectroscopic survey of the Carousel lens galaxy cluster, identifying 12 lensed sources and 57 unlensed field galaxies. The findings could help constrain cosmological parameters and cluster properties.

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/117228634584835048

The third paper of the week, also published on Monday 7th September but in the folder High-Energy Astrophysical Phenomena, is “Dependences of radio pulsar parameters on the kick velocity” by Anton D. Lazarev and Sergei B. Popov (Moscow State U., Russia). This study analyzes the velocity kick of neutron stars, finding that 23% belong to the low-velocity mode. Differences in magnetic field distribution emerge, but no significant bimodality in physical parameters.

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/117228716672955417

The fourth paper of the week is “A Dusty Quenching-Candidate AGN host at z=5.7: massive quiescent galaxies may quench already during the dust-obscured phase” by Francesco D’Eugenio (U. Cambridge, UK) and 14 others from the UK, Italy, China and The Netherlands. It was published on Wednesday 8th September in the folder Astrophysics of Galaxies. This article concerns RUBIES-EGS-9809, a dust-reddened galaxy with a dominant point-source component, suggests that AGN feedback may influence its host., indicating that massive galaxies can host evolved stellar populations during their dust-obscured phase.

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/117240213971385314

The fifth paper of the week is “The Carousel Lens I: A Spectroscopic Survey of the Carousel Lens Field” by Jackson H. O’Donnell (U.C. Santa Cruz, USA) and 22 others from around the world. This was published in the folder Astrophysics of Galaxies on Thursday 10th September 2026. This paper presents a spectroscopic survey of the Carousel lens galaxy cluster, identifying 12 lensed sources and 57 unlensed field galaxies. The findings could help constrain cosmological parameters and cluster properties.

The overlay for this one looks like this:

The officially-accepted version of this paper is on arXiv here and the Mastodon announcement on the fediverse here:

https://fediscience.org/@OJ_Astro/117245758277502000

The penultimate, sixth, paper of the week is “No Gravitational Anomaly in Wide Binaries from Forward Modeling of 3D Orbits” by Serat M. Saad and Yuan-Sen Ting (Ohio State U., USA). This was also published on Thursday 10th September, but in the folder Solar and Stellar Astrophysics. The study reanalyzes a dataset on gravitational anomalies, finding results consistent with Newtonian gravity, contrary to previous findings that suggested Modified Newtonian Dynamics. The overlay for this one is here:

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

https://fediscience.org/@OJ_Astro/117245834036376367

Last but by no means least we have “The quenching time and timescale distribution of z~2 quiescent galaxies from precise colour distribution analysis” by Vivienne Wild (U. St Andrews, UK), Ho-Hin Leung & Adam Carnal (U. Edinburgh, UK) and Maya Skarbinski (Johns Hopkins U., USA). This paper was published on Thursday 10th September in the folder Astrophysics of Galaxies. It describes a study that uses simulation-based inference to analyze galaxy formation and quenching times, revealing that galaxies must quench rapidly post-Big Bang to achieve a specific color distribution.

The overlay is here:

The final version of this paper is on the arXiv here and the Mastodon announcement here:

https://fediscience.org/@OJ_Astro/117245909777322846

It is worth mentioning that there was one deferred arXiv mailing this week, due to the Labor Day holiday in the USA, so some papers were therefore published a day later than usual.

That concludes this week’s update. I’ll do another next weekend.

Weekly Update from the Open Journal of Astrophysics 12/09/2026

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 seven papers, bringing the number in Volume 9 (2026) to 202 and the total so far published by OJAp up to 649. This means that the total in Vol. 9 (2026) has now passed that of Vol. 8 (2025), with more than three months to go.

I continue to include the posts made on our Mastodon account (on Fediscience); these announcements also contain a clickable form of the DOI for each paper. Our Mastodon account has regular updates and other announcements from OJAp too.

The first paper this week was published on Monday 7th September in the folder Astrophysics of Galaxies. The title is “Not all cores are equal: Phase-space origins of dynamical friction, stalling and buoyancy” and the authors are Shashank Dattathri & Frank C. van den Bosch (Yale U., USA), Uddipan Banik (Princeton U., USA), Martin Weinberg (U. Mass., USA), Priyamvada Natarajan (Yale U., USA), Zhaozhou Li (Nanjing U., China) and Avishai Dekel (The Hebrew U., Israel). The paper describes how the distribution function of a galaxy, not just its central density gradient, influences the efficiency and direction of dynamical friction, affecting the movement of massive objects within it.

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/117228580379311271

The second paper for this week, also published on Monday 7th September, but in the folder Earth and Planetary Astrophysics, is “The Third Option: Color Phase Curves to Characterize the Atmospheres of Temperate Rocky Exoplanets” by Drake Deming (U. Maryland, USA) and 8 others based in the USA, Germany and The Netherlands. This article presents a A spectroscopic survey of the Carousel lens galaxy cluster, identifying 12 lensed sources and 57 unlensed field galaxies. The findings could help constrain cosmological parameters and cluster properties.

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/117228634584835048

The third paper of the week, also published on Monday 7th September but in the folder High-Energy Astrophysical Phenomena, is “Dependences of radio pulsar parameters on the kick velocity” by Anton D. Lazarev and Sergei B. Popov (Moscow State U., Russia). This study analyzes the velocity kick of neutron stars, finding that 23% belong to the low-velocity mode. Differences in magnetic field distribution emerge, but no significant bimodality in physical parameters.

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/117228716672955417

The fourth paper of the week is “A Dusty Quenching-Candidate AGN host at z=5.7: massive quiescent galaxies may quench already during the dust-obscured phase” by Francesco D’Eugenio (U. Cambridge, UK) and 14 others from the UK, Italy, China and The Netherlands. It was published on Wednesday 8th September in the folder Astrophysics of Galaxies. This article concerns RUBIES-EGS-9809, a dust-reddened galaxy with a dominant point-source component, suggests that AGN feedback may influence its host., indicating that massive galaxies can host evolved stellar populations during their dust-obscured phase.

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/117240213971385314

The fifth paper of the week is “The Carousel Lens I: A Spectroscopic Survey of the Carousel Lens Field” by Jackson H. O’Donnell (U.C. Santa Cruz, USA) and 22 others from around the world. This was published in the folder Astrophysics of Galaxies on Thursday 10th September 2026. This paper presents a spectroscopic survey of the Carousel lens galaxy cluster, identifying 12 lensed sources and 57 unlensed field galaxies. The findings could help constrain cosmological parameters and cluster properties.

The overlay for this one looks like this:

The officially-accepted version of this paper is on arXiv here and the Mastodon announcement on the fediverse here:

https://fediscience.org/@OJ_Astro/117245758277502000

The penultimate, sixth, paper of the week is “No Gravitational Anomaly in Wide Binaries from Forward Modeling of 3D Orbits” by Serat M. Saad and Yuan-Sen Ting (Ohio State U., USA). This was also published on Thursday 10th September, but in the folder Solar and Stellar Astrophysics. The study reanalyzes a dataset on gravitational anomalies, finding results consistent with Newtonian gravity, contrary to previous findings that suggested Modified Newtonian Dynamics. The overlay for this one is here:

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

https://fediscience.org/@OJ_Astro/117245834036376367

Last but by no means least we have “The quenching time and timescale distribution of z~2 quiescent galaxies from precise colour distribution analysis” by Vivienne Wild (U. St Andrews, UK), Ho-Hin Leung & Adam Carnal (U. Edinburgh, UK) and Maya Skarbinski (Johns Hopkins U., USA). This paper was published on Thursday 10th September in the folder Astrophysics of Galaxies. It describes a study that uses simulation-based inference to analyze galaxy formation and quenching times, revealing that galaxies must quench rapidly post-Big Bang to achieve a specific color distribution.

The overlay is here:

The final version of this paper is on the arXiv here and the Mastodon announcement here:

https://fediscience.org/@OJ_Astro/117245909777322846

It is worth mentioning that there was one deferred arXiv mailing this week, due to the Labor Day holiday in the USA, so some papers were therefore published a day later than usual.

That concludes this week’s update. I’ll do another next weekend.

Weekly Update from the Open Journal of Astrophysics 12/09/2026

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 seven papers, bringing the number in Volume 9 (2026) to 202 and the total so far published by OJAp up to 649. This means that the total in Vol. 9 (2026) has now passed that of Vol. 8 (2025), with more than three months to go.

I continue to include the posts made on our Mastodon account (on Fediscience); these announcements also contain a clickable form of the DOI for each paper. Our Mastodon account has regular updates and other announcements from OJAp too.

The first paper this week was published on Monday 7th September in the folder Astrophysics of Galaxies. The title is “Not all cores are equal: Phase-space origins of dynamical friction, stalling and buoyancy” and the authors are Shashank Dattathri & Frank C. van den Bosch (Yale U., USA), Uddipan Banik (Princeton U., USA), Martin Weinberg (U. Mass., USA), Priyamvada Natarajan (Yale U., USA), Zhaozhou Li (Nanjing U., China) and Avishai Dekel (The Hebrew U., Israel). The paper describes how the distribution function of a galaxy, not just its central density gradient, influences the efficiency and direction of dynamical friction, affecting the movement of massive objects within it.

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/117228580379311271

The second paper for this week, also published on Monday 7th September, but in the folder Earth and Planetary Astrophysics, is “The Third Option: Color Phase Curves to Characterize the Atmospheres of Temperate Rocky Exoplanets” by Drake Deming (U. Maryland, USA) and 8 others based in the USA, Germany and The Netherlands. This article presents a A spectroscopic survey of the Carousel lens galaxy cluster, identifying 12 lensed sources and 57 unlensed field galaxies. The findings could help constrain cosmological parameters and cluster properties.

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/117228634584835048

The third paper of the week, also published on Monday 7th September but in the folder High-Energy Astrophysical Phenomena, is “Dependences of radio pulsar parameters on the kick velocity” by Anton D. Lazarev and Sergei B. Popov (Moscow State U., Russia). This study analyzes the velocity kick of neutron stars, finding that 23% belong to the low-velocity mode. Differences in magnetic field distribution emerge, but no significant bimodality in physical parameters.

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/117228716672955417

The fourth paper of the week is “A Dusty Quenching-Candidate AGN host at z=5.7: massive quiescent galaxies may quench already during the dust-obscured phase” by Francesco D’Eugenio (U. Cambridge, UK) and 14 others from the UK, Italy, China and The Netherlands. It was published on Wednesday 8th September in the folder Astrophysics of Galaxies. This article concerns RUBIES-EGS-9809, a dust-reddened galaxy with a dominant point-source component, suggests that AGN feedback may influence its host., indicating that massive galaxies can host evolved stellar populations during their dust-obscured phase.

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/117240213971385314

The fifth paper of the week is “The Carousel Lens I: A Spectroscopic Survey of the Carousel Lens Field” by Jackson H. O’Donnell (U.C. Santa Cruz, USA) and 22 others from around the world. This was published in the folder Astrophysics of Galaxies on Thursday 10th September 2026. This paper presents a spectroscopic survey of the Carousel lens galaxy cluster, identifying 12 lensed sources and 57 unlensed field galaxies. The findings could help constrain cosmological parameters and cluster properties.

The overlay for this one looks like this:

The officially-accepted version of this paper is on arXiv here and the Mastodon announcement on the fediverse here:

https://fediscience.org/@OJ_Astro/117245758277502000

The penultimate, sixth, paper of the week is “No Gravitational Anomaly in Wide Binaries from Forward Modeling of 3D Orbits” by Serat M. Saad and Yuan-Sen Ting (Ohio State U., USA). This was also published on Thursday 10th September, but in the folder Solar and Stellar Astrophysics. The study reanalyzes a dataset on gravitational anomalies, finding results consistent with Newtonian gravity, contrary to previous findings that suggested Modified Newtonian Dynamics. The overlay for this one is here:

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

https://fediscience.org/@OJ_Astro/117245834036376367

Last but by no means least we have “The quenching time and timescale distribution of z~2 quiescent galaxies from precise colour distribution analysis” by Vivienne Wild (U. St Andrews, UK), Ho-Hin Leung & Adam Carnal (U. Edinburgh, UK) and Maya Skarbinski (Johns Hopkins U., USA). This paper was published on Thursday 10th September in the folder Astrophysics of Galaxies. It describes a study that uses simulation-based inference to analyze galaxy formation and quenching times, revealing that galaxies must quench rapidly post-Big Bang to achieve a specific color distribution.

The overlay is here:

The final version of this paper is on the arXiv here and the Mastodon announcement here:

https://fediscience.org/@OJ_Astro/117245909777322846

It is worth mentioning that there was one deferred arXiv mailing this week, due to the Labor Day holiday in the USA, so some papers were therefore published a day later than usual.

That concludes this week’s update. I’ll do another next weekend.

Weekly Update from the Open Journal of Astrophysics 12/09/2026

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 seven papers, bringing the number in Volume 9 (2026) to 202 and the total so far published by OJAp up to 649. This means that the total in Vol. 9 (2026) has now passed that of Vol. 8 (2025), with more than three months to go.

I continue to include the posts made on our Mastodon account (on Fediscience); these announcements also contain a clickable form of the DOI for each paper. Our Mastodon account has regular updates and other announcements from OJAp too.

The first paper this week was published on Monday 7th September in the folder Astrophysics of Galaxies. The title is “Not all cores are equal: Phase-space origins of dynamical friction, stalling and buoyancy” and the authors are Shashank Dattathri & Frank C. van den Bosch (Yale U., USA), Uddipan Banik (Princeton U., USA), Martin Weinberg (U. Mass., USA), Priyamvada Natarajan (Yale U., USA), Zhaozhou Li (Nanjing U., China) and Avishai Dekel (The Hebrew U., Israel). The paper describes how the distribution function of a galaxy, not just its central density gradient, influences the efficiency and direction of dynamical friction, affecting the movement of massive objects within it.

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/117228580379311271

The second paper for this week, also published on Monday 7th September, but in the folder Earth and Planetary Astrophysics, is “The Third Option: Color Phase Curves to Characterize the Atmospheres of Temperate Rocky Exoplanets” by Drake Deming (U. Maryland, USA) and 8 others based in the USA, Germany and The Netherlands. This article presents a A spectroscopic survey of the Carousel lens galaxy cluster, identifying 12 lensed sources and 57 unlensed field galaxies. The findings could help constrain cosmological parameters and cluster properties.

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/117228634584835048

The third paper of the week, also published on Monday 7th September but in the folder High-Energy Astrophysical Phenomena, is “Dependences of radio pulsar parameters on the kick velocity” by Anton D. Lazarev and Sergei B. Popov (Moscow State U., Russia). This study analyzes the velocity kick of neutron stars, finding that 23% belong to the low-velocity mode. Differences in magnetic field distribution emerge, but no significant bimodality in physical parameters.

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/117228716672955417

The fourth paper of the week is “A Dusty Quenching-Candidate AGN host at z=5.7: massive quiescent galaxies may quench already during the dust-obscured phase” by Francesco D’Eugenio (U. Cambridge, UK) and 14 others from the UK, Italy, China and The Netherlands. It was published on Wednesday 8th September in the folder Astrophysics of Galaxies. This article concerns RUBIES-EGS-9809, a dust-reddened galaxy with a dominant point-source component, suggests that AGN feedback may influence its host., indicating that massive galaxies can host evolved stellar populations during their dust-obscured phase.

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/117240213971385314

The fifth paper of the week is “The Carousel Lens I: A Spectroscopic Survey of the Carousel Lens Field” by Jackson H. O’Donnell (U.C. Santa Cruz, USA) and 22 others from around the world. This was published in the folder Astrophysics of Galaxies on Thursday 10th September 2026. This paper presents a spectroscopic survey of the Carousel lens galaxy cluster, identifying 12 lensed sources and 57 unlensed field galaxies. The findings could help constrain cosmological parameters and cluster properties.

The overlay for this one looks like this:

The officially-accepted version of this paper is on arXiv here and the Mastodon announcement on the fediverse here:

https://fediscience.org/@OJ_Astro/117245758277502000

The penultimate, sixth, paper of the week is “No Gravitational Anomaly in Wide Binaries from Forward Modeling of 3D Orbits” by Serat M. Saad and Yuan-Sen Ting (Ohio State U., USA). This was also published on Thursday 10th September, but in the folder Solar and Stellar Astrophysics. The study reanalyzes a dataset on gravitational anomalies, finding results consistent with Newtonian gravity, contrary to previous findings that suggested Modified Newtonian Dynamics. The overlay for this one is here:

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

https://fediscience.org/@OJ_Astro/117245834036376367

Last but by no means least we have “The quenching time and timescale distribution of z~2 quiescent galaxies from precise colour distribution analysis” by Vivienne Wild (U. St Andrews, UK), Ho-Hin Leung & Adam Carnal (U. Edinburgh, UK) and Maya Skarbinski (Johns Hopkins U., USA). This paper was published on Thursday 10th September in the folder Astrophysics of Galaxies. It describes a study that uses simulation-based inference to analyze galaxy formation and quenching times, revealing that galaxies must quench rapidly post-Big Bang to achieve a specific color distribution.

The overlay is here:

The final version of this paper is on the arXiv here and the Mastodon announcement here:

https://fediscience.org/@OJ_Astro/117245909777322846

It is worth mentioning that there was one deferred arXiv mailing this week, due to the Labor Day holiday in the USA, so some papers were therefore published a day later than usual.

That concludes this week’s update. I’ll do another next weekend.

Weekly Update from the Open Journal of Astrophysics 20/06/2026

It’s Saturday again so it’s 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 126 and the total so far published by OJAp up to 574.

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, published on Monday 15th June, is “SN 2025adpq: A Type Ia supernova in a collisional ring formed during a major galaxy merger” by Brendan O’Connor (Carnegie Mellon University, USA) and 18 others based in the USA, Germany and Australia. The study reports the discovery of a Type Ia supernova, SN 2025adpq, within a collisional ring formed by a major galaxy merger., offset from the nucleus of the primary galaxy. It is published in the folder Astrophysics of Galaxies.

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/116753183446523072

The second paper for this week, published on Tuesday June 16th in the folder Astrophysics of Galaxies is “The Colors of Ices: Measuring ice column density through photometry” by Adam Ginsburg (U. Florida, USA) and ten others based in the USA, Germany and Spain. This study demonstrates that JWST photometry can identify and quantify interstellar ices, using new open-source models, interstellar ices, finding significant abundance in non-star-forming gas, suggesting many avenues for further research.

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/116758595971333611

The third paper of the week, published on Wednesday 17th June in the folder Cosmology and Nongalactic Astrophysics is “The Non-Gaussian Weak-Lensing Likelihood: A Multivariate Copula Construction and Impact on Cosmological Constraints” by Veronika Oehl and Tilman Tröster (both of ETH Zurich, Switzerland). This study presents a framework for computing non-Gaussian likelihoods for correlation functions, particularly useful in large-scale weak-lensing surveys. It suggests Gaussian likelihoods are sufficient for stage-IV surveys.

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/116764509657843733

The fourth and final paper of the week, also ublished on Wednesday 17th June but in the folder Astrophysics of Galaxies, is “Black Hole Feedback, Galaxy Quenching and Outflows at Cosmic Dawn: Analysis of the SEEDZ Simulations” by Lewis R. Prole (Maynooth University, Ireland) and 15 others based in Ireland, Germany, USA and UK. The study analyzes the growth and feedback effects of massive black holes in SEEDZ simulations, suggesting that black hole feedback, not nearby supernovae or gas exhaustion, limits initial growth.

The overlay is here:

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

https://fediscience.org/@OJ_Astro/116764428903842241

And that concludes this week’s update. It has been a slow week on the publishing front, but the main reason is that we have a big backlog of papers accepted but waiting for the authors to put their final versions on arXiv and we can’t do anything about that! I’ll do another update next Saturday.

Weekly Update from the Open Journal of Astrophysics – 30/05/2026

It’s Saturday once again, so it’s time for another 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 114 and the total so far published by OJAp up to 562.

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, published on Monday 25th May is “Little Red Dot – Host Galaxy = Black Hole Star: A Gas-Enshrouded Heart at the Center of Every Little Red Dot” by Wendy Q. Sun (MIT, USA) and 32 others from around the world. This study presents evidence that “black hole stars” (BH*), early stages of black hole growth, power Little Red Dots (LRDs) and every massive black hole may have been a BH*.

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/116633975428093674

The second paper for this week, also published on Monday 25th May but in the folder Cosmology and Nongalactic Astrophysics, is “Catalog-based detection of unrecognized blends in deep optical ground based imaging” by Shuang Liang (Stanford U., USA) and Prakruth Adari & Anja von der Linden (Stony Brook U., USA) on behalf of the LSST Dark Energy Science Collaboration. The study uses machine learning to detect unrecognized blends in deep ground-based imaging, improving sample purity and potentially enhancing accuracy in future cosmological 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/116634039240557325

Next one up, the third paper of the week, published on Tuesday 26th May in the folder Cosmology and Nongalactic Astrophysics is “Control variates from Eulerian and Lagrangian perturbation theory: Application to the bispectrum” by Nickolas Kokron and Shi-Fan Chen (Institute for Advanced Study, Princeton, USA). This paper hexplores the use of control variates in cosmological simulations, introducing a new ‘shifted control variate’ that improves precision and enables accurate bispectrum emulators, aiding in cosmology modeling.

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/116594304124291605

The fourth and final paper this week, also published on Tuesday 26th May is “How precisely can we measure the ages of subgiant and giant stars?” by Cheyanne Shariat, Kareem El-Badry and Soumyadeep Bhattacharjee (California Institute of Technology, USA). This article, published in the folder Solar and Stellar Astrophysics, is about testing the accuracy of stellar age estimates from recent catalogs, finding that spectroscopic metallicities provide reliable subgiant ages, while photometric ages underestimate uncertainties. Accurate chemical abundance measurements are essential.

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/116639604621500984

And that concludes this week’s update. I’ll do another one next Saturday.

Weekly Update from the Open Journal of Astrophysics – 30/05/2026

It’s Saturday once again, so it’s time for another 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 114 and the total so far published by OJAp up to 562.

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, published on Monday 25th May is “Little Red Dot – Host Galaxy = Black Hole Star: A Gas-Enshrouded Heart at the Center of Every Little Red Dot” by Wendy Q. Sun (MIT, USA) and 32 others from around the world. This study presents evidence that “black hole stars” (BH*), early stages of black hole growth, power Little Red Dots (LRDs) and every massive black hole may have been a BH*.

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/116633975428093674

The second paper for this week, also published on Monday 25th May but in the folder Cosmology and Nongalactic Astrophysics, is “Catalog-based detection of unrecognized blends in deep optical ground based imaging” by Shuang Liang (Stanford U., USA) and Prakruth Adari & Anja von der Linden (Stony Brook U., USA) on behalf of the LSST Dark Energy Science Collaboration. The study uses machine learning to detect unrecognized blends in deep ground-based imaging, improving sample purity and potentially enhancing accuracy in future cosmological 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/116634039240557325

Next one up, the third paper of the week, published on Tuesday 26th May in the folder Cosmology and Nongalactic Astrophysics is “Control variates from Eulerian and Lagrangian perturbation theory: Application to the bispectrum” by Nickolas Kokron and Shi-Fan Chen (Institute for Advanced Study, Princeton, USA). This paper hexplores the use of control variates in cosmological simulations, introducing a new ‘shifted control variate’ that improves precision and enables accurate bispectrum emulators, aiding in cosmology modeling.

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/116594304124291605

The fourth and final paper this week, also published on Tuesday 26th May is “How precisely can we measure the ages of subgiant and giant stars?” by Cheyanne Shariat, Kareem El-Badry and Soumyadeep Bhattacharjee (California Institute of Technology, USA). This article, published in the folder Solar and Stellar Astrophysics, is about testing the accuracy of stellar age estimates from recent catalogs, finding that spectroscopic metallicities provide reliable subgiant ages, while photometric ages underestimate uncertainties. Accurate chemical abundance measurements are essential.

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/116639604621500984

And that concludes this week’s update. I’ll do another one next Saturday.

Weekly Update from the Open Journal of Astrophysics – 23/05/2026

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 six papers, bringing the number in Volume 9 (2026) to 110 and the total so far published by OJAp up to 558.

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, published on Monday 18th May in the folder Instrumentation and Methods for Astrophysics is “Edges In Coadded Images” by Erin Sheldon (Brookhaven National Laboratory, USA). This paper describes a study exploring how image discontinuities and noise impact weak gravitational lensing measurements, finding no significant biases under typical conditions. Biases occur only in extreme cases, but can be mitigated.

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/116594222032390191

The second paper for this week, also published on Monday 18th May but in the folder Cosmology and Nongalactic Astrophysics, is “Joint cosmological fits to DESI-DR1 full-shape clustering and weak gravitational lensing in configuration space” by A. Semenaite (Swinburne Institute of Technology, Australia) and 72 other authors from all round the world. This paper presents a cosmological analysis of correlations between the DESI-DR1 Bright Galaxy Survey and Luminous Red Galaxy samples and overlapping shear measurements from various weak lensing 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/116594256215421009

Next one up, the third paper of the week, and the third published on Monday 18th May, and in the folder Cosmology and Nongalactic Astrophysics is “Probing Dark Energy Microphysics with kSZ Tomography” by Julius Adolff, Selim Hotinli and Neal Dalal (all of the Perimeter Institute, Canada). This paper explores how kinetic Sunyaev-Zel’dovich tomography and galaxy clustering can enhance our understanding of dark energy and its effects, potentially revealing its microphysical properties in future surveys.

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/116594304124291605

The fourth paper this week, published on Wednesday May 20th is “A Census of Variable Radio Sources at 3 GHz” by Yjan A. Gordon, Peter S. Ferguson, Michael N. Martinez and Eric J. Hooper (all of the University of Wisconsin, USA). This article, published in the folder Astrophysics of Galaxies, uses data from the Very Large Array Sky Survey to analyze variability in the radio sky, finding most changes consistent with blazars and quasars.

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/116607468481260244

The fifth article of this week was published on Friday 22nd May in the folder Instrumentation and Methods for Astrophysics. The title is “Uncovering the Next Galactic Supernova with the Vera C. Rubin Observatory” by John Banovetz (Lawrence Berkeley Lab., USA), Claire-Alice Hebert & Peter B. Denton (Brookhaven National Lab., USA), Dan Scolnic (Duke University, USA), Anze Slosar (Brookhaven) and Chris Walter (Duke). The paper presents a study simulating how effectively the Vera C. Rubin Observatory can localize supernovae using neutrino triggers, finding a 57-97% success rate based on stellar mass density predictions.

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/116617293753093751

Last, but by no means least, this week we have “Pulsar timing solutions for 17 pulsars at 150 MHz from the Irish LOFAR station” by David J. McKenna (ASTRON, The Netherlands), Evan F. Keane (Trinity College Dublin, Ireland), Peter T. Gallagher (DIAS, Ireland) and Joe McCauley (Trinity). This was published on Friday 22nd May in the folder High-Energy Astrophysical Phenomena. It presents a demonstration of the use of international Low Frequency Array (LOFAR) stations in tracking and characterizing pulsars, providing new insights into these neutron stars’ emission properties.

The overlay for this one 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/116617404344791486

And that concludes this week’s update. I’ll do another one next Saturday.

Weekly Update from the Open Journal of Astrophysics – 23/05/2026

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 six papers, bringing the number in Volume 9 (2026) to 110 and the total so far published by OJAp up to 558.

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, published on Monday 18th May in the folder Instrumentation and Methods for Astrophysics is “Edges In Coadded Images” by Erin Sheldon (Brookhaven National Laboratory, USA). This paper describes a study exploring how image discontinuities and noise impact weak gravitational lensing measurements, finding no significant biases under typical conditions. Biases occur only in extreme cases, but can be mitigated.

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/116594222032390191

The second paper for this week, also published on Monday 18th May but in the folder Cosmology and Nongalactic Astrophysics, is “Joint cosmological fits to DESI-DR1 full-shape clustering and weak gravitational lensing in configuration space” by A. Semenaite (Swinburne Institute of Technology, Australia) and 72 other authors from all round the world. This paper presents a cosmological analysis of correlations between the DESI-DR1 Bright Galaxy Survey and Luminous Red Galaxy samples and overlapping shear measurements from various weak lensing 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/116594256215421009

Next one up, the third paper of the week, and the third published on Monday 18th May, and in the folder Cosmology and Nongalactic Astrophysics is “Probing Dark Energy Microphysics with kSZ Tomography” by Julius Adolff, Selim Hotinli and Neal Dalal (all of the Perimeter Institute, Canada). This paper explores how kinetic Sunyaev-Zel’dovich tomography and galaxy clustering can enhance our understanding of dark energy and its effects, potentially revealing its microphysical properties in future surveys.

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/116594304124291605

The fourth paper this week, published on Wednesday May 20th is “A Census of Variable Radio Sources at 3 GHz” by Yjan A. Gordon, Peter S. Ferguson, Michael N. Martinez and Eric J. Hooper (all of the University of Wisconsin, USA). This article, published in the folder Astrophysics of Galaxies, uses data from the Very Large Array Sky Survey to analyze variability in the radio sky, finding most changes consistent with blazars and quasars.

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/116607468481260244

The fifth article of this week was published on Friday 22nd May in the folder Instrumentation and Methods for Astrophysics. The title is “Uncovering the Next Galactic Supernova with the Vera C. Rubin Observatory” by John Banovetz (Lawrence Berkeley Lab., USA), Claire-Alice Hebert & Peter B. Denton (Brookhaven National Lab., USA), Dan Scolnic (Duke University, USA), Anze Slosar (Brookhaven) and Chris Walter (Duke). The paper presents a study simulating how effectively the Vera C. Rubin Observatory can localize supernovae using neutrino triggers, finding a 57-97% success rate based on stellar mass density predictions.

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/116617293753093751

Last, but by no means least, this week we have “Pulsar timing solutions for 17 pulsars at 150 MHz from the Irish LOFAR station” by David J. McKenna (ASTRON, The Netherlands), Evan F. Keane (Trinity College Dublin, Ireland), Peter T. Gallagher (DIAS, Ireland) and Joe McCauley (Trinity). This was published on Friday 22nd May in the folder High-Energy Astrophysical Phenomena. It presents a demonstration of the use of international Low Frequency Array (LOFAR) stations in tracking and characterizing pulsars, providing new insights into these neutron stars’ emission properties.

The overlay for this one 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/116617404344791486

And that concludes this week’s update. I’ll do another one next Saturday.

Weekly Update from the Open Journal of Astrophysics – 16/05/2026

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 104 and the total so far published by OJAp up to 552. It took us until late July to pass 100 last 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, published on Monday 11th May in the folder High-Energy Astrophysical Phenomena is “Triaxial magnetars as sources of fast radio bursts” by Jonathan I Katz (Washington University, USA). This paper suggests that the mysterious properties of Fast Radio Bursts (FRB) could be explained by triaxial magnetars, with their activity levels influenced by precessional time scales.

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/116554775791392800

The second paper for this week, published on Tuesday 12th May in the folder Astrophysics of Galaxies, is “The Abundance of Thin Dwarf Galaxies: a Challenge for Cosmological Simulations” by Jose Benavides & Laura V. Sales (UC Riverside, USA), Julio F. Navarro (U. Victoria, Canada), Simon D. M. White (MPA Garching, Germany), and Carlos S. Frenk, Kyle A. Oman & Shaun Cole (U. Durham, UK). Depending on mass up to 40% of galaxies are intrinsically flat, a fraction that numerical models of galaxy formation struggle to reproduce suggesting the models are incomplete.

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/116560106342500157

Next one up, the third paper of the week, also published on Tuesday 12th May but in the folder Cosmology and Nongalactic Astrophysics is “Cosmological peculiar velocities in general relativity” by Chris Clarkson (Queen Mary, University of London, UK) and Roy Maartens (U. Western Cape, South Africa). This paper refutes claims that the 1+3 covariant approach to cosmological perturbation theory predicts stronger growth of galaxy peculiar velocities, arguing that standard treatments are correct and fully relativistic.

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/116560224426499932

The fourth paper this week, published on Wednesday May 13th “Possible evidence for a pair-instability supernova nature of ultra-early JWST sources” by Andrea Ferrara & Stefano Carniani (Scuola Normale Superiore, Pisa, Italy), Takahiro Morishita (California Institute of Technology, USA), and Massimo Stiavelli (Space Telescope Science Institute, USA). Published in the section Astrophysics of Galaxies. This paper argues that recent observations challenge early galaxy formation models, suggesting that the bright source, Capotauro, could be a supernova from a massive, metal-free star, not a luminous galaxy as initially thought.

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/116566147448743997

The fifth and final article of this week was also published on Wednesday 13th May but in the folder Cosmology and Nongalactic Astrophysics. The title is “Evolving and interacting dark energy: photometric and spectroscopic synergy with DES Y3 and DESI DR2” and it is by Maria Tsedrik and Benjamin Bose (University of Edinburgh, UK). The study investigates the Dark Scattering interacting dark energy scenario, using data from various sources. Results show no evidence of dark-sector interaction and a preference for the Chevallier-Polarski-Linder parametrisation.

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/116566165139100860

And that concludes this week’s update. I’ll do another next Saturday.

Weekly Update from the Open Journal of Astrophysics – 16/05/2026

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 104 and the total so far published by OJAp up to 552. It took us until late July to pass 100 last 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, published on Monday 11th May in the folder High-Energy Astrophysical Phenomena is “Triaxial magnetars as sources of fast radio bursts” by Jonathan I Katz (Washington University, USA). This paper suggests that the mysterious properties of Fast Radio Bursts (FRB) could be explained by triaxial magnetars, with their activity levels influenced by precessional time scales.

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/116554775791392800

The second paper for this week, published on Tuesday 12th May in the folder Astrophysics of Galaxies, is “The Abundance of Thin Dwarf Galaxies: a Challenge for Cosmological Simulations” by Jose Benavides & Laura V. Sales (UC Riverside, USA), Julio F. Navarro (U. Victoria, Canada), Simon D. M. White (MPA Garching, Germany), and Carlos S. Frenk, Kyle A. Oman & Shaun Cole (U. Durham, UK). Depending on mass up to 40% of galaxies are intrinsically flat, a fraction that numerical models of galaxy formation struggle to reproduce suggesting the models are incomplete.

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/116560106342500157

Next one up, the third paper of the week, also published on Tuesday 12th May but in the folder Cosmology and Nongalactic Astrophysics is “Cosmological peculiar velocities in general relativity” by Chris Clarkson (Queen Mary, University of London, UK) and Roy Maartens (U. Western Cape, South Africa). This paper refutes claims that the 1+3 covariant approach to cosmological perturbation theory predicts stronger growth of galaxy peculiar velocities, arguing that standard treatments are correct and fully relativistic.

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/116560224426499932

The fourth paper this week, published on Wednesday May 13th “Possible evidence for a pair-instability supernova nature of ultra-early JWST sources” by Andrea Ferrara & Stefano Carniani (Scuola Normale Superiore, Pisa, Italy), Takahiro Morishita (California Institute of Technology, USA), and Massimo Stiavelli (Space Telescope Science Institute, USA). Published in the section Astrophysics of Galaxies. This paper argues that recent observations challenge early galaxy formation models, suggesting that the bright source, Capotauro, could be a supernova from a massive, metal-free star, not a luminous galaxy as initially thought.

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/116566147448743997

The fifth and final article of this week was also published on Wednesday 13th May but in the folder Cosmology and Nongalactic Astrophysics. The title is “Evolving and interacting dark energy: photometric and spectroscopic synergy with DES Y3 and DESI DR2” and it is by Maria Tsedrik and Benjamin Bose (University of Edinburgh, UK). The study investigates the Dark Scattering interacting dark energy scenario, using data from various sources. Results show no evidence of dark-sector interaction and a preference for the Chevallier-Polarski-Linder parametrisation.

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/116566165139100860

And that concludes this week’s update. I’ll do another 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.

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.

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 – 27/09/2025

It’s Saturday again, so it’s time for a summary of the week’s new papers at the Open Journal of Astrophysics. Since the last update we have published five new papers, which brings the number in Volume 8 (2025) up to 141, and the total so far published by OJAp up to 376.

The first paper to report this week is “The Bispectrum of Intrinsic Alignments: Theory Modelling and Forecasts for Stage IV Galaxy Surveys” by Thomas Bakx (Utrecht U., NL), Alexander Eggemeier (U. Bonn, DE), Toshiki Kurita (MPA Garching, DE), Nora Elisa Chisari (Leiden U., NL) and Zvonimir Vlah (Ruđer Bošković Institute, Croatia). This paper was published on Monday 22nd September 2025 in the folder Cosmology and NonGalactic Astrophysics. It studies the bispectrum of intrinsic galaxy alignments, a possible source of systematic errors in extracting cosmological information from the analysis of weak lensing surveys.

The overlay is here:

You can make this larger by clicking on it.  The officially accepted version of this paper can be found on the arXiv here.

The second paper this week, published on Tuesday 23rd September 2025 is “Reanalysis of Stage-III cosmic shear surveys: A comprehensive study of shear diagnostic tests” by Jazmine Jefferson (University of Chicago, USA) and 13 others for the LSST Dark Energy Science Collaboration. It is also in the folder Cosmology and NonGalactic Astrophysics; it describes diagnostic tests on three public shear catalogs (KiDS-1000, Year 3 DES-Y3 s, and Year 3 HSC-Y3); not all the surveys pass all the tests.

The corresponding overlay is here:

You can find the officially accepted version on arXiv here.

The third one this week, published on Wednesday 24th September 2025 in the folder Astrophysics of Galaxies, is “Is feedback-free star formation possible?” by Andrea Ferrara, Daniele Manzoni, and Evangelia Ntormousi (all of the Scuola Normale Superiore, Pisa, Italy). This paper presents an argument that Lyman-alpha radiation pressure strongly limits star formation efficiency, even at solar metallicities, so that a feedback-free star formation phase is not possible without feedback. The overlay is here:

You can find the officially-accepted version on arXiv here.

Next we have “Microphysical Regulation of Non-Ideal MHD in Weakly-Ionized Systems: Does the Hall Effect Matter?” by Philip F. Hopkins (Caltech, USA), Jonathan Squire (U. Otago, New Zeland), Raphael Skalidis (Caltech) and Nadine H. Soliman (Caltech). This was also published on Wednesday 24th September 2025, but in the folder Earth and Planetary Astrophysics. It presents an improved treatment of non-ideal effects in magnetohydrodynamics, particularly the Hall effect, and a discussion of the implications for weakly-ionized astrophysical systems.

The corresponding overlay is here:

You can find the officially accepted version of this one on arXiv here.

The fifth, and last, one for this week is “The Local Volume Database: a library of the observed properties of nearby dwarf galaxies and star clusters” by Andrew B. Pace (University of Virginia, USA). This one was published on Friday 26th September (i.e. yesterday) in the folder Astrophysics of Galaxies. It presents a catalogue of positional, structural, kinematic, chemical, and dynamical parameters for dwarf galaxies and star clusters in the Local Volume. The overlay is here:

You can find the officially-accepted version of this paper on arxiv here.

And that concludes the report for this week. I’ll post another update next Saturday.

#arXiv240506026v2 #arXiv241107424v2 #arXiv250410009v2 #arXiv250503964v3 #arXiv250902566v2 #AstrophysicsOfGalaxies #bispectrum #cosmicShear #CosmologyAndNonGalacticAstrophysics #DarkEnergySurvey #DiamondOpenAccessPublishing #dwarfGalaxies #EarthAndPlanetaryAstrophysics #feedback #HallEffect #intrinsicAlignments #KIDS #LocalGroup #magnetohydrodynamics #OpenAccessPublishing #StarClusters #starFormation #weakGravitationalLensing

Weekly Update from the Open Journal of Astrophysics – 27/09/2025

It’s Saturday again, so it’s time for a summary of the week’s new papers at the Open Journal of Astrophysics. Since the last update we have published five new papers, which brings the number in Volume 8 (2025) up to 141, and the total so far published by OJAp up to 376.

The first paper to report this week is “The Bispectrum of Intrinsic Alignments: Theory Modelling and Forecasts for Stage IV Galaxy Surveys” by Thomas Bakx (Utrecht U., NL), Alexander Eggemeier (U. Bonn, DE), Toshiki Kurita (MPA Garching, DE), Nora Elisa Chisari (Leiden U., NL) and Zvonimir Vlah (Ruđer Bošković Institute, Croatia). This paper was published on Monday 22nd September 2025 in the folder Cosmology and NonGalactic Astrophysics. It studies the bispectrum of intrinsic galaxy alignments, a possible source of systematic errors in extracting cosmological information from the analysis of weak lensing surveys.

The overlay is here:

You can make this larger by clicking on it.  The officially accepted version of this paper can be found on the arXiv here.

The second paper this week, published on Tuesday 23rd September 2025 is “Reanalysis of Stage-III cosmic shear surveys: A comprehensive study of shear diagnostic tests” by Jazmine Jefferson (University of Chicago, USA) and 13 others for the LSST Dark Energy Science Collaboration. It is also in the folder Cosmology and NonGalactic Astrophysics; it describes diagnostic tests on three public shear catalogs (KiDS-1000, Year 3 DES-Y3 s, and Year 3 HSC-Y3); not all the surveys pass all the tests.

The corresponding overlay is here:

You can find the officially accepted version on arXiv here.

The third one this week, published on Wednesday 24th September 2025 in the folder Astrophysics of Galaxies, is “Is feedback-free star formation possible?” by Andrea Ferrara, Daniele Manzoni, and Evangelia Ntormousi (all of the Scuola Normale Superiore, Pisa, Italy). This paper presents an argument that Lyman-alpha radiation pressure strongly limits star formation efficiency, even at solar metallicities, so that a feedback-free star formation phase is not possible without feedback. The overlay is here:

You can find the officially-accepted version on arXiv here.

Next we have “Microphysical Regulation of Non-Ideal MHD in Weakly-Ionized Systems: Does the Hall Effect Matter?” by Philip F. Hopkins (Caltech, USA), Jonathan Squire (U. Otago, New Zeland), Raphael Skalidis (Caltech) and Nadine H. Soliman (Caltech). This was also published on Wednesday 24th September 2025, but in the folder Earth and Planetary Astrophysics. It presents an improved treatment of non-ideal effects in magnetohydrodynamics, particularly the Hall effect, and a discussion of the implications for weakly-ionized astrophysical systems.

The corresponding overlay is here:

You can find the officially accepted version of this one on arXiv here.

The fifth, and last, one for this week is “The Local Volume Database: a library of the observed properties of nearby dwarf galaxies and star clusters” by Andrew B. Pace (University of Virginia, USA). This one was published on Friday 26th September (i.e. yesterday) in the folder Astrophysics of Galaxies. It presents a catalogue of positional, structural, kinematic, chemical, and dynamical parameters for dwarf galaxies and star clusters in the Local Volume. The overlay is here:

You can find the officially-accepted version of this paper on arxiv here.

And that concludes the report for this week. I’ll post another update next Saturday.

#arXiv240506026v2 #arXiv241107424v2 #arXiv250410009v2 #arXiv250503964v3 #arXiv250902566v2 #AstrophysicsOfGalaxies #bispectrum #cosmicShear #CosmologyAndNonGalacticAstrophysics #DarkEnergySurvey #DiamondOpenAccessPublishing #dwarfGalaxies #EarthAndPlanetaryAstrophysics #feedback #HallEffect #intrinsicAlignments #KIDS #LocalGroup #magnetohydrodynamics #OpenAccessPublishing #StarClusters #starFormation #weakGravitationalLensing

Weekly Update from the Open Journal of Astrophysics – 20/06/2025

Yesterday (Thursday 19th June 2025) was a national holiday in the USA, which means that no new papers were announced on arXiv today (Friday 20th June). I have therefore decided to bring forwarded the usual weekly update of papers published at the Open Journal of Astrophysics by a day. Since the last update we have published three new papers, which brings the number in Volume 8 (2025) up to 74, and the total so far published by OJAp  is now up to 309.

The three papers published this week, with their overlays, are as follows. All three were published on Tuesday, June 17th 2025. You can click on the images of the overlays to make them larger should you wish to do so.

The first paper to report is “Illuminating the Physics of Dark Energy with the Discovery Simulations” by Gillian D. Beltz-Mohrmann (Argonne National Laboratory, USA) and 12 others based in the USA and Spain. This describes new high-resolution cosmological simulations providing a testbed for alternative cosmological probes that may offer additional constraining power beyond Baryon Accoustic Oscillations. It is filed in the folder marked Cosmology and NonGalactic Astrophysics.

The overlay is here:

You can read the final accepted version on arXiv here.

The second paper is in the folder marked Astrophysics of Galaxies. It is “LIGHTS. The extended point spread functions of the LIGHTS survey at the LBT” by Nafise Sedighi (Instituto de Astrofísica de Canarias, Spain) and 15 others based in Spain, USA, Iran, Italy and the UK. It describes the procedure used to construct the extended Point Spread Functions (PSFs) of the LIGHTS survey in images taken with the Large Binocular Cameras (LBCs) of the Large Binocular Telescope (LBT).

The overlay is here:

You can find the officially-accepted version of the paper on arXiv here.

Finally this week we have “Fast radio bursts as a probe of gravity on cosmological scales” by Dennis Neumann (Leiden University, Netherlands), Robert Reischke (Universität Bonn, Germany), Steffen Hagstotz (Ludwig-Maximilians Universität München, Germany) and Hendrik Hildebrandt (Ruhr University Bochum, Germany). This is about using dispersion measures derived from Fast Radio Bursts (FRBs) in combination with cosmic shear to investigate modified gravity theories, specifically Horndeski gravity. It is in the folder marked Cosmology and NonGalactic Astrophysics.

The overlay is here:

You can find the officially-accepted version on arXiv here.

That’s all the papers for this week. I’ll revert to the usual schedule for updates next week, and post the next one on Saturday 28th June.

#arXiv240911163v3 #arXiv241020190v2 #arXiv250305947v2 #AstrophysicsOfGalaxies #cosmicShear #Cosmology #CosmologyAndNonGalacticAstrophysics #DiamondOpenAccessPublishing #DiscoverySimulations #fastRadioBursts #HorndeskiGravity #LargeBinocularTelescope #LIGHTSSurvey #OpenJournalOfAstrophysics #PointSpreadFunction #TheOpenJournalOfAstrophysics

Weekly Update from the Open Journal of Astrophysics – 20/06/2025

Yesterday (Thursday 19th June 2025) was a national holiday in the USA, which means that no new papers were announced on arXiv today (Friday 20th June). I have therefore decided to bring forwarded the usual weekly update of papers published at the Open Journal of Astrophysics by a day. Since the last update we have published three new papers, which brings the number in Volume 8 (2025) up to 74, and the total so far published by OJAp  is now up to 309.

The three papers published this week, with their overlays, are as follows. All three were published on Tuesday, June 17th 2025. You can click on the images of the overlays to make them larger should you wish to do so.

The first paper to report is “Illuminating the Physics of Dark Energy with the Discovery Simulations” by Gillian D. Beltz-Mohrmann (Argonne National Laboratory, USA) and 12 others based in the USA and Spain. This describes new high-resolution cosmological simulations providing a testbed for alternative cosmological probes that may offer additional constraining power beyond Baryon Accoustic Oscillations. It is filed in the folder marked Cosmology and NonGalactic Astrophysics.

The overlay is here:

You can read the final accepted version on arXiv here.

The second paper is in the folder marked Astrophysics of Galaxies. It is “LIGHTS. The extended point spread functions of the LIGHTS survey at the LBT” by Nafise Sedighi (Instituto de Astrofísica de Canarias, Spain) and 15 others based in Spain, USA, Iran, Italy and the UK. It describes the procedure used to construct the extended Point Spread Functions (PSFs) of the LIGHTS survey in images taken with the Large Binocular Cameras (LBCs) of the Large Binocular Telescope (LBT).

The overlay is here:

You can find the officially-accepted version of the paper on arXiv here.

Finally this week we have “Fast radio bursts as a probe of gravity on cosmological scales” by Dennis Neumann (Leiden University, Netherlands), Robert Reischke (Universität Bonn, Germany), Steffen Hagstotz (Ludwig-Maximilians Universität München, Germany) and Hendrik Hildebrandt (Ruhr University Bochum, Germany). This is about using dispersion measures derived from Fast Radio Bursts (FRBs) in combination with cosmic shear to investigate modified gravity theories, specifically Horndeski gravity. It is in the folder marked Cosmology and NonGalactic Astrophysics.

The overlay is here:

You can find the officially-accepted version on arXiv here.

That’s all the papers for this week. I’ll revert to the usual schedule for updates next week, and post the next one on Saturday 28th June.

#arXiv240911163v3 #arXiv241020190v2 #arXiv250305947v2 #AstrophysicsOfGalaxies #cosmicShear #Cosmology #CosmologyAndNonGalacticAstrophysics #DiamondOpenAccessPublishing #DiscoverySimulations #fastRadioBursts #HorndeskiGravity #LargeBinocularTelescope #LIGHTSSurvey #OpenJournalOfAstrophysics #PointSpreadFunction #TheOpenJournalOfAstrophysics