It’s time 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 256 and the total so far published by OJAp up to 704.
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, including posts from the OJAp blog.
New Publication at the Open Journal of Astrophysics: "On the relation between magnetic field strength and gas density in the interstellar medium. II. Density uncertainties and diffuse gas constraints" by David Whitworth (ENS Lyon, France) and 6 others based in Austrailia, Canada, USA, Austria, Mexico and Germany.
New Publication at the Open Journal of Astrophysics: "The Lifecycle and Emission Properties of PAHs in Cosmological Hydrodynamic Galaxy Formation Simulations" by Desika Narayanan (U. Florida, USA) and 18 others.
New Publication at the Open Journal of Astrophysics: "HII-CHI-mistry for active galactic nuclei: optical sulphur abundances without empirical ionisation correction factors" by Enrique Pérez-Montero (Instituto de Astrofísica de Andalucía, Spain) and 5 others.
The fourth article of the week, also published on Wednesday 28th October but in the folder High-Energy Astrophysical Phenomena, is “How Common Are Common Envelopes? Quantifying Their Role in Forming Gravitational-Wave Sources” by Floor Broekgaarden (University of California San Diego, USA) and 16 others. This work involves a compilation and systematically comparison of formation-channel predictions from more than 200 isolated-binary population-synthesis simulations, organized within a unified hierarchical system identify the frequency of common-envelope evolution.
The overlay is here:
The official version of the paper can be found on arXiv here and the Fediverse announcement here:
New Publication at the Open Journal of Astrophysics: "How Common Are Common Envelopes? Quantifying Their Role in Forming Gravitational-Wave Sources" by Floor Broekgaarden (University of California San Diego, USA) and 16 others.
New Publication at the Open Journal of Astrophysics: "From ASTRID to BRAHMA – The role of overmassive black holes in little red dots in cosmological simulations" by Patrick LaChance (Carnegie Mellon U., USA) and 10 others (all based in the USA).
The penultimate, sixth, paper this week is “No Blue without Red: Evolutionary Properties of Super-Early Galaxies” by A. Ferrara (Scuola Normale Superiore, Pisa, Italy) and 5 others based in Italy and China. This was also published on Friday 30th October in the folder Astrophysics of Galaxies. This paper presents an interpretive scheme for the properties of extremely early galaxies highlighting the key role of radiation-driven outflows and indicating how JWST/ALMA observations will provide key tests.
The overlay is here:
You can find the final version of this paper on arXiv here and the Mastodon announcement here:
New Publication at the Open Journal of Astrophysics: "No Blue without Red: Evolutionary Properties of Super-Early Galaxies" by A. Ferrara (Scuola Normale Superiore, Pisa, Italy) and 5 others based in Italy and China
The seventh and last paper to report this week is “Automatic astrometric calibration of low-cost all-sky cameras” by J. R. González Fernández (Universidad Internacional de La Rioja, Spain), Laura Hermosa Muñoz (Universidad de Oviedo, Spain) and María Fernández Alonso & Lucía González Cuesta (Allande Stars, Spain). This was published on Friday 30th October in the folder Instrumentation and Methods for Astrophysics. This paper describes an open-source procedure for astrometric calibration that combines a compact fisheye model, an exact rotation to account for camera tilt, and automatic star matching.
The overlay for this one is here:
The officially accepted version is on arXiv here and this is the Mastodon announcement:
New Publication at the Open Journal of Astrophysics: Automatic astrometric calibration of low-cost all-sky cameras" by J. R. González Fernández (Universidad Internacional de La Rioja, Spain), Laura Hermosa Muñoz (Universidad de Oviedo, Spain) and María Fernández Alonso & Lucía González Cuesta (Allande Stars, Spain)
That concludes this week’s update. There was an interruption in publishing on Thursday 29th October as arXiv did not update on that day owing to its migration into the cloud. Anyway, we have now published over 700 papers in total. So far this year we have published 256, with 10 of the 12 months now complete. A rough estimate would take us to about 307 by the end of the year. We have in fact published more than 300 papers since this time last year. I’ll do another update next week.
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 eight papers, bringing the number in Volume 9 (2026) to 245 and the total so far published by OJAp up to 693. There was no arXiv update on Monday 12th October owing to a US holiday, and I was on strike on Wednesday 14th October, so there were no papers published on either 13th or 14th October.
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, including posts from the OJAp blog.
New Publication at the Open Journal of Astrophysics: "Search for Gamma-ray emission from Abell 119 galaxy cluster using INTEGRAL/ISGRI, COMPTEL, and DAMPE data" by Siddhant Manna & Shantanu Desai (IIT Hyderabad Kandi, India)
New Publication at the Open Journal of Astrophysics: "Fast Astronomical Transients in Archival Photographic Plates: Using optical aberrations as a tool for discerning real images, from plate artifacts" by Ivo Busko (Independent Researcher)
New Publication at the Open Journal of Astrophysics "Differentiable Optics with dLux II: Optical Design Maximising Fisher Information" by Louis Desdoigts (Leiden Obs., NL), Benjamin Pope (Macquarie U., AU), Michael Gully-Santiago (U. Texas Austin, USA) & Peter Tuthill (U. Sydney, AU)
The fourth new article of the week, also published on Thursday 15th October, in the folder Astrophysics of Galaxies is “The Lumina Project: Intergalactic Clumping and Recombination Sinks” by Ali Sadain (U. Texas Dallas, USA) and 12 others based in the USA, S. Korea and Germany. The study uses simulations to examine the uneven recombination rates during the Epoch of Reionization, finding a universal clumping evolution and discrepancies in recombination rates due to photoheating.
The overlay is here:
The official version of the paper can be found on arXiv here and the Fediverse announcement here:
New Publication at the Open Journal of Astrophysics: "The Lumina Project: Intergalactic Clumping and Recombination Sinks" by Ali Sadain (U. Texas Dallas, USA) and 12 others based in the USA, S. Korea and Germany.
Paper Number Five for the week is “Blast.jl: Differentiable Non-Limber Power Spectra for Joint Clustering, Shear, and CMB lensing Analyses” by Sofia Chiarenza (U. Waterloo, Canada) and 6 others based in Canada, Italy, France and USA. This study, which is in the folder Cosmology and Nongalactic Astrophysics, presents an enhanced version of Blast.jl, a toolkit for computing non-Limber angular power spectra, incorporating various cosmological effects. Despite increased complexity, it maintains efficiency and supports gradient-based inference. It was also published on Thursday 15th October.
The overlay is here:
The officially-accepted version of the paper can be found on arXiv here and the Fediverse announcement here:
New Publication at the Open Journal of Astrophysics: "Blast.jl: Differentiable Non-Limber Power Spectra for Joint Clustering, Shear, and CMB lensing Analyses" by Sofia Chiarenza (U. Waterloo, Canada) and 6 others based in Canada, Italy, France and USA.
Sixth one up is “EMU detection of mysterious multiple component radio-continuum emission from nearby spiral Seyfert I type galaxy ‘Sand-timer’ (NGC 7213)” by Miroslav Filipović (Western Sydney U., Australia) and an international cast of 26 others. The observations presented in this paper reveal peculiar emissions and previously undetected features in the ‘Sand-timer’ galaxy NGC 7213, possibly due to black hole activity or a tidal disruption event.
The overlay is here:
The officially-accepted version of this paper is on arXiv here and the Mastodon announcement on the fediverse here:
New Publication at the Open Journal of Astrophysics: "Blast.jl: Differentiable Non-Limber Power Spectra for Joint Clustering, Shear, and CMB lensing Analyses" by Sofia Chiarenza (U. Waterloo, Canada) and 6 others based in Canada, Italy, France and USA.
The seventh paper of the week is “pynucastro 3: A community library for nuclear astrophysics” by Zhi Chen (Stony Brook U., USA) and 10 others, all based in the USA. This was published on Friday 16th October, i.e. yesterday, in the folder Instrumentation and Methods for Astrophysics. This article announces the latest release of pynucastro, a python library for nuclear astrophysics, includes new rate approximations, a stellar equation of state, StarLib support, and network exploration tools.
The overlay is here:
The officially accepted version is on arXiv here and the Mastodon announcement here:
New Publication at the Open Journal of Astrophysics: "pynucastro 3: A community library for nuclear astrophysics" by Zhi Chen (Stony Brook U., USA) and 10 others, all based in the USA.
The eighth, and last, of the new papers for this week is “A Deep Look at the Ultra-Faint Milky Way Satellite Virgo III with Rubin Observatory Data Preview 2” by Aashay Pai (U. Chicago, USA) and 12 others based in the USA. This study uses data from the Vera C. Rubin Observatory to analyze the ultra-faint Milky Way satellite, Virgo III, confirming Virgo III’s properties as an ultra-faint dwarf galaxy.
The overlay is here:
The final version of this paper is on the arXiv here and the Mastodon announcement here:
New Publication at the Open Journal of Astrophysics: "A Deep Look at the Ultra-Faint Milky Way Satellite Virgo III with Rubin Observatory Data Preview 2" by Aashay Pai (U. Chicago, USA) and 12 others based in the USA.
That concludes this week’s update. I anticipate that we’ll pass the 250 mark for 2026 next week, which means we’re well on target to publish over 300 papers and reach the 750 mark by the end of the year. I’ll do another update next weekend.
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 eight papers, bringing the number in Volume 9 (2026) to 237 and the total so far published by OJAp up to 685.
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, including posts from the OJAp blog.
The first new paper this week was published on Monday 5th October in the folder Solar and Stellar Astrophysics. The title of the paper is “Diameters and Temperatures VII: High-angular resolution measurements of Solar-type stars with the CHARA Array” and it isby Tabetha Boyajian (Louisiana State University, USA) and 10 others based in the USA and Australia. This study uses interferometric measurements to determine precise characteristics of 27 nearby solar-type stars, including their radii, effective temperatures, and luminosities. The findings represent benchmarks for testing stellar evolutionary theory.
The overlay for this one is here:
You can find the officially accepted version on arXiv here and the announcement on Fediverse here:
New Publication at the Open Journal of Astrophysics: "Diameters and Temperatures VII: High-angular resolution measurements of Solar-type stars with the CHARA Array" by Tabetha Boyajian (Louisiana State University, USA) and 10 others based in the USA and Australia.
New Publication at the Open Journal of Astrophysics: "The jet-shaped pipe morphology in planetary nebulae and core-collapse supernova remnants" by Jessica Braudo and Noam Soker (Technion, Israel)
New Publication at the Open Journal of Astrophysics: "Balancing bias, baryons, and scale cuts in LSST 3x2pt analysis" by Ottavia Truttero (U. Edinburgh, UK) and 5 others on behalf of the The LSST Dark Energy Science Collaboration
New Publication at the Open Journal of Astrophysics: "High-Precision Differential Radial Velocities of C3PO Wide Binaries: A Test of Modified Newtonian Dynamics (MOND)" by Serat M. Saad and Yuan-Sen Ting (Ohio State University, USA)
New Publication at the Open Journal of Astrophysics: "Simulating the jittering-jets explosion mechanism: circum-jet rings account for observed core-collapse supernova remnant morphologies" by Muhammad Akashi & Noam Soker (Technion, Israel)
The sixth paper of the week is “Radio Continuum Study of One of the Brightest Large Magellanic Cloud Supernova Remnant N 132D” by Rami Z. E. Alsaberi (Western Sydney U. Australia) and 7 others. This was the first of three papers published on Friday 9th October, and it is in the folder High-Energy Astrophysical Phenomena. This one presents a radio continuum analysis of the Large Magellanic Cloud supernova remnant N 132D, revealing insights into its magnetic field structure, energetic properties, and particle acceleration.
The officially-accepted version of this paper is on arXiv here and the Mastodon announcement on the fediverse here:
New Publication at the Open Journal of Astrophysics: "Radio Continuum Study of One of the Brightest Large Magellanic Cloud Supernova Remnant N 132D" by Rami Z. E. Alsaberi (Western Sydney U. Australia) and 7 others
The seventh paper of the week is “New Signs Pointing Toward a Correlation Between Astrophysical Neutrinos and Radio Flares” by Yjan Gordon (U. Wisconsin-Madison), Peter S. Ferguson (U. Washington), Eric J. Hooper & Michael N. Martinez (U. Wisconsin-Madison); all in the USA. This was also published on Friday 7th October, but in the folder Astrophysics of Galaxies. It is very topical, in the light of the award of this year’s Nobel Prize for Physics to Francis Halzen for his work on IceCube. The paper explains how data from VLASS and IceCube Neutrino Observatory reveal a correlation between radio variability and astrophysical neutrino detection, suggesting radio flares contribute to about 13% of astrophysical neutrinos detected by IceCube.
The overlay is here:
The officially accepted version is on arXiv here and the Mastodon announcement here:
New Publication at the Open Journal of Astrophysics: "New Signs Pointing Toward a Correlation Between Astrophysical Neutrinos and Radio Flares" by Yjan Gordon (U. Wisconsin-Madison), Peter S. Ferguson (U. Washington), Eric J. Hooper & Michael N. Martinez (U. Wisconsin-Madison); all in the USA
New Publication at the Open Journal of Astrophysics: "Spectroscopic follow-up of compact object binary candidates from Gaia DR3: White dwarfs, neutron stars, black holes, and the parallax zeropoint" by Kareem El-Badry (Caltech, USA) and an international cast of 14 others.
That concludes this week’s update. We’re still on target to publish over 300 papers and reach the 750 mark by the end of the year. I’ll do another update next week.
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 13 papers, including one correction to an article already published, bringing the number in Volume 9 (2026) to 229 and the total so far published by OJAp up to 677. This would have been a busy week even without the clutch of four MEGATRON papers announced on Wednesday!
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, including posts from the OJAp blog.
The first new paper this week was published on Tuesday 28th September in the folder Solar and Stellar Astrophysics. The title is “Phlegethon: a fully compressible magnetohydrodynamic code for simulations in stellar astrophysics” and it is by G. Leidi (Heidelberger Institut für Theoretische Studie, Germany) and 14 others. PHLEGETHON is a magnetohydrodynamic code designed for multidimensional simulations in stellar astrophysics, capable of modeling a wide range of dynamical processes in stars. It is publicly accessible online.
The overlay for this one is here:
You can find the officially accepted version on arXiv here and the announcement on Fediverse here:
New Publication at the Open Journal of Astrophysics: "Phlegethon: a fully compressible magnetohydrodynamic code for simulations in stellar astrophysics" by G. Leidi (Heidelberger Institut für Theoretische Studie, Germany) and 14 others.
New Publication at the Open Journal of Astrophysics: "The impact of source and survey modelling on the connection between [O III] emitters and Ly-α forest transmission at z ~ 6" by Luke Conaboy (U. Nottingham, UK) and 5 others based in the UK, India and Germany.
Next we have four related papers produced by the MEGATRON Project, led by Harley Katz (U. Chicago) and Martin Rey (U. Bath, UK), Corentin Cadiou (IAP Paris, France). These were all published on Wednesday 30th September in the folder Astrophysics of Galaxies.
I mentioned this in a separate blog post here, so I won’t describe them in detail again here. Here are the four overlays:
The Mastodon announcement for these is in the form of a thread:
Today we have published four related papers produced by the MEGATRON Project, led by Harley Katz (U. Chicago) and Martin Rey (U. Bath, UK), Corentin Cadiou (IAP Paris, France)
These articles are announced in the following thread:
The four papers can be found on arXiv here, here, here and here.
The four MEGATRON papers were not the only ones published on Wednesday 30th September, however. We published “The Chirp-Mass Ladder: A New Rung Emerges” by Vaibhav Tiwari (U. Birmingham, UK) in the folder High-Energy Astrophysical Phenomena on that day too. This paper presents an analysis of 256 binary black-hole (BBH) events, suggesting a hierarchical merger scenario to explain the structured mass distribution, and encouraging further investigation into hierarchical mergers’ role in the BBH population. The overlay for this is here:
The accepted version of this one can be found on the arXiv here and the Mastodon announcement here:
New Publication at the Open Journal of Astrophysics: "Kinematics of the Weak Cool-Core Cluster A3571 Observed with XRISM: Low Cooling Rate Balanced by Low Heating Rate?" by Hannah McCall (U. Chicago, USA) and 12 others based around the world.
We now have four papers all published on Friday 2nd October (i.e. yesterday).
The first of this batch is “Analytical weak-lensing shear response of galaxy model fitting” by Xiangchong Li (Brookhaven National Laboratory, USA). This is in the folder marked Cosmology and Nongalactic Astrophysics: it explores how galaxy model fitting responds to weak-lensing shear distortions using a new algebraic system, quintuple numbers, within the AnaCal framework, keeping multiplicative bias low.
The overlay is here:
The officially-accepted version of the paper can be found on arXiv here and the Fediverse announcement here:
New Publication at the Open Journal of Astrophysics: "Analytical weak-lensing shear response of galaxy model fitting" by Xiangchong Li (Brookhaven National Laboratory, USA)
New Publication at the Open Journal of Astrophysics: "Evidence for inefficient dust production in a massive, metal-rich galaxy at z=7.13 uncovered by JWST and ALMA" by Kasper E. Heintz (Cosmic Dawn Center, Copenhagen, Denmark) and 19 others in Europe, UK and USA.
The 11th paper of the week is “Starbursts hiding in the main sequence: a pathway toward quenching?” by Florent Renaud (Observatoire Astronomique de Strasbourg, France) and 12 others based in France and UK. This article explores the “starbursts in the main sequence” (SBMSs) that intermittently appear in galaxy evolution, attributing their existence to earlier stellar mass assembly and frequent mergers. It was published on Friday 2nd October 2026, in the folder Astrophysics of Galaxies.
The overlay is here:
The officially accepted version is on arXiv here and the Mastodon announcement here:
New Publication at the Open Journal of Astrophysics: "Starbursts hiding in the main sequence: a pathway toward quenching?" by Florent Renaud (Observatoire Astronomique de Strasbourg, France) and 12 others based in France and UK.
New Publication at the Open Journal of Astrophysics: "Ring Position Angles and Spin in M87* and Sgr A*" by Nicholas S. Conroy (U. Illinois at Urbana-Champaign, USA) and 6 others all based in the USA.
And finally, on Monday 28th September we announced one (minor) correction to a previously published article. The overlay of the correction notice is here:
Correction Notice issued at the Open Journal of Astrophysics: "CORRECTION – TDCOSMO XXVI: Uniform Lens Modeling of Eight Doubly Imaged Quasars" by Brady et al. (originally published 7th August 2026).
The corrected version of this paper can be found on arXiv here.
That concludes this week’s update. As things are going we seem likely to publish over 300 papers this year, and may reach the 750 mark by the end of the year too. I’ll do another update next week.
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:
New Publication at the Open Journal of Astrophysics: "Not all cores are equal: Phase-space origins of dynamical friction, stalling and buoyancy" by 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 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:
New Publication at the Open Journal of Astrophysics: "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.
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:
New Publication at the Open Journal of Astrophysics: "Dependences of radio pulsar parameters on the kick velocity" by Anton D. Lazarev and Sergei B. Popov (Moscow State U., Russia)
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:
New Publication at the Open Journal of Astrophysics: "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.
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:
New Publication at the Open Journal of Astrophysics: "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.
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:
New Publication at the Open Journal of Astrophysics: "No Gravitational Anomaly in Wide Binaries from Forward Modeling of 3D Orbits" by Serat M. Saad and Yuan-Sen Ting (Ohio State U., USA)
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:
New Publication at the Open Journal of Astrophysics: "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)
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.
After a very busy week, 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 five papers, bringing the number in Volume 9 (2026) to 194 and the total so far published by OJAp up to 642. As explained at the end of this post, one of the five publications is a correction of an earlier paper.
I continue to include the posts made on our Mastodon account (on Fediscience); these announcements also show the DOI for each paper. The Mastodon account has regular updates and other announcements from OJAp too.
The first paper this week was published on Monday 31st August 2026 in the folder Earth and Planetary Astrophysics: “Modeling Carbon-Based Planets with MAGRATHEA” by Robert L Royer (U. Nevada, USA), David R Rice (U. Wisconsin-Madison, USA) and Jason H Steffen (U. Nevada, USA). This describes a modification of the planetary interior solver MAGRATHEA to include Carbon-based mantles to enable it to understand more fully the range of possible planet structures.
The overlay is here:
You can find the officially accepted version on arXiv here and the announcement on Fediverse here:
New Publication at the Open Journal of Astrophysics: "Modeling Carbon-Based Planets with MAGRATHEA" by Robert L Royer (U. Nevada, USA), David R Rice (U. Wisconsin-Madison, USA) and Jason H Steffen (U. Nevada, USA)
The second paper for this week, published on Tuesday 1st September in the folder High-Energy Astrophysical Phenomena is “SCAT Data Release 1: 1812 optical spectra of 1331 transients” by Michael A Tucker (Ohio State University, USA) and 21 others from around the world. This is the first data release of the Spectroscopic Classification of Astronomical Transients survey includes 1812 spectra of 1331 transients, offering valuable insights for photometric/light curve classification pipelines.
The overlay looks like this:
The official version of the paper can be found on arXiv here and the Fediverse announcement here:
New Publication at the Open Journal of Astrophysics: "SCAT Data Release 1: 1812 optical spectra of 1331 transients" by Michael A Tucker (Ohio State University, USA) and 21 others from around the world.
The third paper of the week is “The neighboring stars of N6946-BH1 and the observational characteristics of failed supernovae” by Raquel Forés-Toribio and C. S. Kochanek (Ohio State University, USA). This study, published on Wednesday 2nd September 2026 in the folder Solar and Stellar Astrophysics, re-analyzes images of potential failed supernova N6946-BH1, finding four unrelated near-infrared neighbors. It also compares the luminosity of failed supernova remnants to stellar merger remnants, noting significant differences.
The overlay is here:
The official version of the paper can be found on arXiv here and the Fediverse announcement here:
New Publication at the Open Journal of Astrophysics: "The neighboring stars of N6946-BH1 and the observational characteristics of failed supernovae" by Raquel Forés-Toribio and C. S. Kochanek (Ohio State University, USA)
The fourth paper of the week is “How similar are narrow-line Seyfert 1 galaxies and high-z type 1 AGN?” by Marco Berton (ESO, Chile), Emilia Järvelä (Texas Tech. U., USA), Alessia Tortosa (INAF – Osservatorio Astronomico di Roma, Italy) and Chiara Mazzucchelli (Universidad Diego Portales, Chile). This was published on Thursday 3rd September 2026 in the folder Astrophysics of Galaxies. This paper reviews the properties of local narrow-line Seyfert 1 galaxies and compares them with high-redshift active galactic nuclei, aiding understanding of early black hole evolution.
The overlay is here:
The officially-accepted version of the paper can be found on arXiv here and the Fediverse announcement here:
New Publication at the Open Journal of Astrophysics: "How similar are narrow-line Seyfert 1 galaxies and high-z type 1 AGN?" by Marco Berton (ESO, Chile), Emilia Järvelä (Texas Tech. U., USA), Alessia Tortosa (INAF – Osservatorio Astronomico di Roma, Italy) and Chiara Mazzucchelli (Universidad Diego Portales, Chile)
CORRECTION issued at the Open Journal of Astrophysics: "CORRECTION – DESI Data Release 1: Stellar Catalogue" by Koposov et al. (2026) (DOI:10.33232/001c.155260)
In the past when we have had minor correctionsto make we have simply asked the authors to create a new version, then when it has been checked, to place it on arXiv with a comment on the correction made. We then change the overlay to point to the new version with a comment on the change. I was recently advised, however, that best practice is to create a specific entry in Crossref for the corrected version, linked to the old one. Our Scholastica platform now has a mechanism to do this so from now on we will adopt this approach.
After a very busy week, 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 twelve papers, bringing the number in Volume 9 (2026) to 189 and the total so far published by OJAp up to 637. As I pointed out on Wednesday this week is the first during which we have published at least one paper in each of the six categories on astro-ph.
I continue to include the posts made on our Mastodon account (on Fediscience); these announcements also show the DOI for each paper. The Mastodon account has regular updates and announcements from OJAp too.
In the past on these posts I have included the article keywords as tags, but this is quite a lot of effort to do for little benefit so I’ve decided just to tag the arXiv category (i.e. folder) and arXiv ID for each paper as well as the lede from the journal platform.
The first one up this week was published on Monday 24th August 2026 in the folder Astrophysics of Galaxies. “Energy-Space Analysis of Tidal Stripping in Stellar-Dark Matter Systems“, by Bradley Arias (UC Berkeley, USA), Nicole E. Drakos (U. Hawaii, USA) and James E. Taylor (U. Waterloo, Canada), uses simulations to explore how tidal stripping shapes the stellar distribution of dwarf galaxies, also suggesting a pathway for the formation of galaxies deficient in dark matter
You can find the officially accepted version on arXiv here and the announcement on Fediverse here:
New Publication at the Open Journal of Astrophysics: "Energy-Space Analysis of Tidal Stripping in Stellar-Dark Matter Systems" by Bradley Arias (UC Berkeley, USA), Nicole E. Drakos (U. Hawaii, USA) and James E. Taylor (U. Waterloo, Canada)
The second paper for this week, also published on Monday 24th August but in the folder Cosmology and Nongalactic Astrophysics is “Second Order Closures for the Radiative Transfer Equation: Some Are Unstable” by Nickolay Y. Gnedin and Harley Katz (U.Chicago, USA). This study explores higher-order closure relations in cosmic reionization simulations, finding that direct generalizations of M1 and OTVET are physically unstable, limiting second-order closure options.
The overlay looks like this:
The official version of the paper can be found on arXiv here and the Fediverse announcement here:
New Publication at the Open Journal of Astrophysics: "Second Order Closures for the Radiative Transfer Equation: Some Are Unstable" by Nickolay Y. Gnedin and Harley Katz (U.Chicago, USA)
New Publication at the Open Journal of Astrophysics: "Differentiable Forward Modeling for Efficient and Accurate Shear Inference" by Ismael Mendoza and 7 others on behalf of the LSST Dark Energy Science Collaboration.
New Publication at the Open Journal of Astrophysics: "BLG723.31.34651 as an eclipsing Roche lobe-filling sdOB+WD binary" by Alekzander Kosakowski, Charles E. Derbyshire, Sydney Jetton and Brad N. Barlow (University of North Carolina, USA)
The fifth paper of the week is “Differentiable Halo Mass Prediction and the Cosmology-Dependence of Halo Mass Functions” by Jim Buisman, Florian List and Oliver Hahn (U. Vienna, Austria). This was published on Tuesday 25th August in the folder Cosmology and Nongalactic Astrophysics; it presents a novel approach using a differentiable neural network model for predicting dark matter haloes abundance and their cosmology dependence, achieving competitive accuracy in identifying protohalo regions.Abstractfor Differentiable Halo Mass Prediction and the Cosmology-Dependence of Halo Mass Functions.
The overlay is here:
The officially-accepted version of the paper can be found on arXiv here and the Fediverse announcement here:
New Publication at the Open Journal of Astrophysics: "Differentiable Halo Mass Prediction and the Cosmology-Dependence of Halo Mass Functions" by Jim Buisman, Florian List and Oliver Hahn (U. Vienna, Austria)
The sixth paper of the week is “An astrometric search for planets in debris disk systems” by Elisabeth M Penderghast & Benjamin C Bromley (U. Utah, USA), Scott J Kenyon (Smithsonian Astrophys. Obs., USA) and Joan R Najita (NSF NOIRLab, USA). This was published on Tuesday 25th August 2026 in the folder Earth and Planetary Astrophysics. This study uses Gaia astrometric data and machine learning to identify stars with debris disks that may host undiscovered planets, providing potential subjects for future analyses.
The overlay is here:
You can find the officially-accepted version of the paper on arXiv here and the Fediverse announcement here:
New Publication at the Open Journal of Astrophysics: "An astrometric search for planets in debris disk systems" by Elisabeth M Penderghast & Benjamin C Bromley (U. Utah, USA), Scott J Kenyon (Smithsonian Astrophys. Obs., USA) and Joan R Najita (NSF NOIRLab, USA)
New Publication at the Open Journal of Astrophysics: "Precision Spectroscopy for 1.7 Million Galaxies from SDSS-IV: Improved Spectral Measurements and Catalogs for eBOSS" by Owen Matthews Acuña (U. Wisconsin Madison, USA) and 8 others based at various instititions in the USA.
The eighth paper of the week, published on Wednesday 27th August in the folder High-Energy Astrophysical Phenomena is the one that completed our full house for the week. This study presents XRISM observations of the merging cluster Abell 2034, revealing the broadest emission lines yet seen in a galaxy cluster, indicating potential turbulence and core disruption.
The overlay is here:
You can find the official version on arXiv here and the Mastodon announcement is here
New Publication at the Open Journal of Astrophysics: "The major cluster merger in Abell 2034 as seen by XRISM: Strong turbulence and spectral anomalies?" by Annie Heinrich (U. Chicago) and 7 others based in the USA and Europe.
New Publication at the Open Journal of Astrophysics: "Visualizing Disequilibrium: Tracing Two-Point Correlations to Specific Spatial Structures in the Milky Way" by Austin Hinkel and Josephine Vanzant (Thomas More U. USA)
The tenth paper of the week is “Assessing Self-Absorbed Molecular Lines as Tracers of Gravitational Collapse” by Lillian Y. Cai (Priinceton U., USA) and Felix D. Priestley & Sarah E. Ragan (Cardiff U., UK). This paper, reveals that traditional observational techniques probably underestimate true infall velocities and mass accretion rates in collapsing prestellar cores due to non-uniform radial velocity profiles.
The overlay for this one is here:
The officially accepted version can be found on arXiv here and here is the fediverse announcement:
New Publication at the Open Journal of Astrophysics: "Assessing Self-Absorbed Molecular Lines as Tracers of Gravitational Collapse" by Lillian Y. Cai (Priinceton U., USA) and Felix D. Priestley & Sarah E. Ragan (Cardiff U., UK)
New Publication at the Open Journal of Astrophysics: "The Impact of Non-Gaussian Line Spread Functions on Stellar Kinematic Recovery: Consequences for Dynamical Models" by David A. Simon (Oxford U, UK)
New Publication at the Open Journal of Astrophysics: "Impact and interplay of ΛCDM analysis choices for LSST cosmic shear" by Naomi Clare Robertson and 11 others for the FLAMINGO Team and the LSST Dark Energy Science Collaboration
In my recent weekly updates of activity at the Open Journal of Astrophysics, the latest of which is here, I’ve remarked that we had built up quite a backlog of papers accepted but yet to be published. This is no doubt due to August being a holiday for many researchers. Well, we seem to be catching up rather rapidly. So far this week we have published eight new papers, and it’s only Wednesday!
The recent burst of activity has led to us establishing a first, a week in which we have published a full house of at least one paper in each of the six sections of astro-ph on the arXiv. As a reminder, these are they:
astro-ph.GA – Astrophysics of Galaxies. Phenomena pertaining to galaxies or the Milky Way. Star clusters, HII regions and planetary nebulae, the interstellar medium, atomic and molecular clouds, dust. Stellar populations. Galactic structure, formation, dynamics. Galactic nuclei, bulges, disks, halo. Active Galactic Nuclei, supermassive black holes, quasars. Gravitational lens systems. The Milky Way and its contents
astro-ph.CO – Cosmology and Nongalactic Astrophysics. Phenomenology of early universe, cosmic microwave background, cosmological parameters, primordial element abundances, extragalactic distance scale, large-scale structure of the universe. Groups, superclusters, voids, intergalactic medium. Particle astrophysics: dark energy, dark matter, baryogenesis, leptogenesis, inflationary models, reheating, monopoles, WIMPs, cosmic strings, primordial black holes, cosmological gravitational radiation
astro-ph.EP – Earth and Planetary Astrophysics. Interplanetary medium, planetary physics, planetary astrobiology, extrasolar planets, comets, asteroids, meteorites. Structure and formation of the solar system
astro-ph.HE – High Energy Astrophysical Phenomena. Cosmic ray production, acceleration, propagation, detection. Gamma ray astronomy and bursts, X-rays, charged particles, supernovae and other explosive phenomena, stellar remnants and accretion systems, jets, microquasars, neutron stars, pulsars, black holes
astro-ph.IM – Instrumentation and Methods for Astrophysics. Detector and telescope design, experiment proposals. Laboratory Astrophysics. Methods for data analysis, statistical methods. Software, database design
astro-ph.SR – Solar and Stellar Astrophysics. White dwarfs, brown dwarfs, cataclysmic variables. Star formation and protostellar systems, stellar astrobiology, binary and multiple systems of stars, stellar evolution and structure, coronas. Central stars of planetary nebulae. Helioseismology, solar neutrinos, production and detection of gravitational radiation from stellar systems.
As of yesterday we had published in five of the six categories and were only missing a paper (in Number 4 – High-Energy Astrophysical Phenomena). Today, right on cue, from the queue, came this paper to complete the set:
There’s still a couple of days to go and we have more papers in the pipeline so it looks like I’ll have a busy time on Saturday morning when I do the next update!
Although it’s still holiday season for some, it’s time once more for another Saturday update of activity at the Open Journal of Astrophysics. Since the last update we have published a further four papers, bringing the number in Volume 9 (2026) to 171 and the total so far published by OJAp up to 619.
I continue to include the posts made on our Mastodon account (on Fediscience); these announcements also show the DOI for each paper.
New Publication at the Open Journal of Astrophysics: "Search for neutrino emission from blazar γ-ray flares accounting for possible neutrino time delays" by Egor Podlesny & Foteini Oikonomou (Norwegian University of Science & Technology, Trondheim, Norway)
The second paper for this week, published on Tuesday 11th August in the folder Cosmology and Nongalactic Astrophysics is “The velocity coherence scale: a novel probe of cosmic homogeneity and a potential standard ruler” by Leonardo Giani (Swinburne University of Technology), Cullan Howlet (U. Queensland), Chris Blake (Swinburne), Ryan J. Turner (Australia National University) and Tamara M. Davis (U. Queensland) – all in Australia. This paper argues that velocity coherence scale, a measure that identifies the transition point of galaxy motion from correlated to anti-correlated, could potentially characterize the onset of cosmic homogeneity.
The overlay looks like this:
The official version of the paper can be found on arXiv here and the Fediverse announcement here:
New Publication at the Open Journal of Astrophysics: "The velocity coherence scale: a novel probe of cosmic homogeneity and a potential standard ruler" by Leonardo Giani (Swinburne U. Tech.), Cullan Howlet (U. Queensland), Chris Blake (Swinburne), Ryan J. Turner (ANU) and Tamara M. Davis (U. Queensland) – all in Australia.
New Publication at the Open Journal of Astrophysics: "A GLIMPSE of the 99%: a census of the faintest galaxies during the epoch of reionization and its implications for galaxy formation models" by Hakim Atek (Sorbonne Université, Paris, France) and 21 others based around the world.
The fourth and final paper of the week was published on Wednesday 12th August in the folder Astrophysics of Galaxies: “Dust and Grain Size Evolution in Galaxy Simulations: What Matters and What Does Not” by Massimiliano Parente & Desika Narayanan (U. Florida, USA) and Paul Torrey (U. Virginia, USA) presents the first implementation of an evolving dust grain size distribution within a model of galaxy evolution, successfully reproducing key observational constraints and exploring the mechanisms shaping galaxies.
The overlay is here:
The officially-accepted version of the paper can be found on arXiv here and the Fediverse announcement here:
New Publication at the Open Journal of Astrophysics: "Dust and Grain Size Evolution in Galaxy Simulations: What Matters and What Does Not" by Massimiliano Parente & Desika Narayanan (U. Florida, USA) and Paul Torrey (U. Virginia, USA)
That’s all for this week. We’re just ticking over at the moment, and steadily building up a backlog of papers to publish while we wait for authors to put their final versions on arXiv. I have a feeling there’s going to be a big splurge sometime. Will it be next week? We’ll find out next Saturday!
It’s time once more for another Saturday update of activity at the Open Journal of Astrophysics. Since the last update we have published a further nine papers, bringing the number in Volume 9 (2026) to 160 and the total so far published by OJAp up to 608.
I will continue to include the posts made on our Mastodon account (on Fediscience); these announcements also show the DOI for each paper.
The first paper to report this week was published on Tuesday 21st July in the folder Cosmology and Nongalactic Astrophysics. The title is “Characterization of the Polarization Beam Response of SPT-3G Using Point Sources” by Tijmen de Haan (Institute of Particle and Nuclear Studies, Ibaraki, Japan) and an international cast of 101 others. This study presents measurements of the South Pole Telescope’s polarized beam response, indicating minimal sidelobe depolarization. The findings suggest potential explanations for frequency-dependent residuals in power spectrum analysis.
The overlay for this paper is here
You can find the officially accepted version on arXiv here and the announcement on Fediverse here:
New Publication at the Open Journal of Astrophysics: "Characterization of the Polarization Beam Response of SPT-3G Using Point Sources" by Tijmen de Haan (Institute of Particle and Nuclear Studies, Ibaraki, Japan) and 101 others from around the world
The second paper for this week, also published on Tuesday 21st July but in the folder Earth and Planetary Astrophysics is: “Exploring TRAPPIST-1 Climate States with an Energy Balance Model” by Jacob Haqq-Misra (Blue Marble Space, USA). The study uses a modified HEXTOR energy balance model to predict climate states of terrestrial planets orbiting low-mass stars, suggesting partial to complete ice cover for TRAPPIST-1 e and f.Abstractfor Exploring TRAPPIST-1 Climate States with an Energy Balance Model.
The overlay looks like this:
The official version of the paper can be found on arXiv here and the Fediverse announcement here:
New Publication at the Open Journal of Astrophysics: "Exploring TRAPPIST-1 Climate States with an Energy Balance Model" by Jacob Haqq-Misra (Blue Marble Space, USA)
New Publication at the Open Journal of Astrophysics: "A first systematic study of [OIII] 88μm at z>8: two luminous oxygen lines and a powerful ionized outflow in the first 600 million years" by Hiddo Algera (Institute of Astronomy and Astrophysics, Taipei, Taiwan) and 37 others from all around the world.
The fourth paper of the week, published on Thursday 23rd July in the folder Astrophysics of Galaxies, is “Mapping CO Ice in a Star-Forming Filament in the 3 kpc Arm with JWST” by Savannah Gramze (U. Florida, USA) and 16 others based all around the world. This paper shows that JWST observations and ALMA Band 3 data reveal that 50-88% of CO gas in a star-forming filament is locked in ice; corrections are needed for mass measurements in such systems.
The overlay for this one is here:
You can read the final version of this one on arXiv here and the Mastodon announcement is here:
New Publication at the Open Journal of Astrophysics: "Mapping CO Ice in a Star-Forming Filament in the 3 kpc Arm with JWST" by Savannah Gramze (U. Florida, USA) and 16 others based all around the world.
New Publication at the Open Journal of Astrophysics: "Viscously Spreading Accretion Disks around Black Holes: Implications for TDEs, LFBOTs and other Transients" by Mila Winter-Granic and Eliot Quataert (Princeton University, USA)
The sixth paper of this week is “Characterising the response of an International LOFAR Station” by Letizia Vincetti (Trinity Collge Dublin, Ireland) and 9 others based in Ireland, USA, The Netherlands and Sweden. This was also published on Thursday July 23rd and is in the folder Instrumentation and Methods for Astrophysics. The article presents an investigation of the performance and calibration challenges of phased-array radio interferometers, using the Irish LOFAR station as a case study, highlighting the importance of accurate beam modelling, etc.
The overlay for this one is here:
You can find the final accepted version on arXiv here and the Mastodon announcement is here:
New Publication at the Open Journal of Astrophysics: "Characterising the response of an International LOFAR Station" by Letizia Vincetti (Trinity Collge Dublin, Ireland) and 9 others based in Ireland, USA, The Netherlands and Sweden
New Publication at the Open Journal of Astrophysics: "Exo Skryer: A JAX-accelerated sub-stellar atmospheric retrieval framework" by Elspeth K.H. Lee (U. Bern, Switzerland)
New Publication at the Open Journal of Astrophysics: "GCR Spectra Reconstructed with Neutron Monitor Yield Function and Artificial Neural Networks: Comparison of Two Methods" by Stepan A. Siruk (Moscow Engineering Physics Institute MEPhI, Russia) and four others based in Russia
And finally for this week we have “The failed failed-supernova scenario of M31-2014-DS1” by Noam Soker (Technion, Israel), a paper which challenges the failed-supernova theory for the fading of the yellow supergiant event M31-2014-DS1, suggesting it requires unlikely parameters and supports an alternative scenario involving violent binary interaction. This was published on Friday 24th July in the folder High-Energy Astrophysical Phenomena.
The overlay for this one is here:
You can find the final accepted version on arXiv here and the Mastodon announcement is here:
And that concludes the update of this week’s business. As it was foretold, the total number of publications at OJAp has now passed the 600 mark, and the likely number for 2026 is around 300. We published a paper in five of the six astro-ph categories this week, but still haven’t had a week when we’ve published a full house with at least one in all six…
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