Astrophysics of Galaxies

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Weekly Update from the Open Journal of Astrophysics 02/10/2026

Posted in OJAp Papers, Open Access, The Universe and Stuff with tags arXiv:2506.16607v4, arXiv:2510.05201v2, arXiv:2510.05232v2, arXiv:2510.05667v3, arXiv:2510.07936v2, arXiv:2602.23445v3, arXiv:2604.12672v2, arXiv:2604.24908v3, arXiv:2605.30433v2, arXiv:2606.03753v2, arXiv:2606.11322v2, arXiv:2606.18081v4, arXiv:2609.36124v1, Astrophysics of Galaxies, Cosmology and NonGalactic Astrophysics, Diamond Open Access, Diamond Open Access Publishing, High-Energy Astrophysical Phenomena, MEGATRON, Open Access, Open Access Publishing., Open Journal of Astrophysics, Solar and Stellar Astrophysics, The Open Journal of Astrophysics on October 3, 2026 by telescoper

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:

The second paper for this week, published on Tuesday 29th September, is “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. This study improves theoretical work on the connection between galaxies and the intergalactic medium, using an empirical model and James Webb Space Telescope surveys. It is in the folder marked Cosmology and Nongalactic Astrophysics.

The overlay looks like this:

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

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:

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:

The eighth new paper of the week, published on Thursday 1st October 2026, in the folder Cosmology and Nongalactic Astrophysics, is “A Consistent Implementation of Cluster Strong Lensing in Cosmological Simulation Light Cones” by Cian Roche (MIT, USA) and 11 others based in the USA, Germany and Italy.

The overlay is here:

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

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:

The 10th paper of the week is “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. This article, published on Friday 2nd October 2026, in the folder Astrophysics of Galaxies, analyzes cosmic dust in high redshift galaxies, specifically A1689-zD1, using data from JWST and ALMA, suggesting dust formation and destruction processes differ for galaxies in the early Universe.

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

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:

The twelfth, and last, of the new papers for this week is “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. This was also published on Friday 2nd October but in the folder High-Energy Astrophysical Phenomena.

The overlay is here:

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

And finally, on Monday 28th September we announced one (minor) correction to a previously published article. The overlay of the correction notice is here:

The mastodon announcement is here:

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.

A MEGATRON Day!

Posted in OJAp Papers, Open Access, The Universe and Stuff with tags Astrophysics of Galaxies, MEGATRON, The Open Journal of Astrophysics on September 30, 2026 by telescoper

Today we published four papers at the Open Journal of Astrophysics all related to the Megatron Project which is co-led by Martin Rey of the University of Bath (UK), Harley Katz of the University of Chicago (USA) and Corentin Cadiou of the Institut d’Astrophysique de Paris in France. I will include this quartet in my regular weekly update on Saturday but there is a press release accompanying these publications so I thought I’d splash them a bit here too.

I’ll show the overlays on Saturday but in the meantime here are some pretty graphics from three of the papers:

In no particular order the four papers are:

MEGATRON: Reproducing the Diversity of High-Redshift Galaxy Spectra with Cosmological Radiation Hydrodynamics Simulations

MEGATRON: how the first stars can create an iron metallicity plateau in the smallest dwarf galaxies

MEGATRON: the impact of non-equilibrium effects and local radiation fields on the circumgalactic medium at cosmic noon”

MEGATRON: The Physical Origins of Steep UV Slopes at high redshift

The Press Release from the University of Bath is reproduced below. A Press Release in French can be found here.

–o–

New simulations connect the first stars to cosmic fingerprints still visible today

International MEGATRON project links space telescope observations of the infant Universe with the chemical fossil record of the Milky Way.

Researchers have used some of the most detailed simulations yet of the early Universe to investigate how the first stars and galaxies formed.

Led by researchers at the University of Bath, alongside collaborators at the University of Chicago in the US and the Institut d’Astrophysique de Paris in France, the MEGATRON project uses advanced simulations to explore how the first stars and galaxies lit up the previously dark cosmos and enriched it with the chemical elements that would later become the building blocks of everything around us.

Published today in the Open Journal of Astrophysics, four studies from the MEGATRON project combine cutting-edge cosmological simulations with sophisticated models of radiation, chemistry and galaxy formation. Together, these constitute the collaboration’s first substantial body of published results, with further papers expected to follow.

The findings from the study of the first stars show that accurately capturing the interplay between starlight, gas and newly forged elements is essential for connecting two previously separate views of the early Universe: observations of young galaxies by the James Webb Space Telescope (JWST) and the chemical clues preserved in ancient stars in and around the Milky Way – the galaxy that contains our Solar System.

JWST provides a direct view of galaxies in the infant Universe, while ancient stars act as a fossil record of cosmic history. By studying the chemical fingerprints of these ancient stars, astronomers can reconstruct the properties of the first stars and trace how they enriched the cosmos with the first chemical elements.

The simulations follow the evolution of a young galaxy that will eventually grow into a system similar in mass to the Milky Way. Using advanced computer models that simultaneously track the movement of gas, the propagation of starlight and the evolution of chemical concentrations, the team investigated how stars shape the gas in and around galaxies over billions of years.

The study suggests that simplified models may underestimate the influence of stellar radiation and complex chemical processes on the gas surrounding galaxies. By modelling these effects at exceptionally high resolution, the team resolved structures in the gas that are not captured by simpler models, helping to improve predictions for current and future astronomical observations.

A direct glimpse of the infant cosmos

Dr Martin Rey from the Department of Physics at the University of Bath and a lead contributor to the MEGATRON collaboration, said: “The James Webb Space Telescope gives us a direct glimpse of the infant cosmos, while stellar archaeology allows us to study the relics of those earliest times in our own Galactic neighbourhood. MEGATRON provides a physical bridge between the two.”

The simulations begin with pristine gas containing no heavy elements, mirroring conditions shortly after the Big Bang. They then follow the birth of the first stars, the radiation they emit, the supernova explosions that mark their deaths and the dispersal of newly forged elements into subsequent generations of stars and galaxies.

Understanding this process is central to one of astronomy’s most fundamental questions: where the elements that make up today’s Universe came from.

Dr Rey said: “The elements that make our world and life possible – carbon, oxygen, iron and many others – were forged by stars. To understand where those elements came from, we need to understand how the first stars formed and enriched their surroundings. MEGATRON allows us to test these ideas directly by comparing detailed simulations with observations from JWST and the chemical fingerprints preserved in ancient stars.”

Looking ahead, the team plans to use MEGATRON to strengthen links between theory and emerging observational data. As JWST continues to transform our understanding of the earliest galaxies, large-scale stellar surveys will provide increasingly detailed information about ancient stars in and around the Milky Way.

Dr Rey and his colleagues at Bath are already developing the next generation of simulations. The project has been awarded 40 million processor hours on the UK’s national supercomputers, equivalent to running five million laptops in parallel for a year. These resources will enable simulations with higher resolution and more complete physical models, allowing even more direct comparisons with JWST observations and the chemical fossil record preserved in ancient stars.

“MEGATRON provides a common physical framework for interpreting two of astronomy’s most exciting new datasets: JWST’s view of the earliest galaxies and the stellar fossil record,” said Dr Rey. “Together, these complementary observations allow us to test competing models of the first stars in ways that weren’t previously possible.”

The MEGATRON project started in 2023 and is scheduled to run until 2030.

1 Comment »

Weekly Update from the Open Journal of Astrophysics 26/09/2026

Posted in OJAp Papers, Open Access, The Universe and Stuff with tags arXiv:2508.09742v2, arXiv:2512.11035v5, arXiv:2512.11313v2, arXiv:2605.30410v3, arXiv:2606.29988v2, arXiv:2607.24141v2, arXiv:2608.03876v2, arXiv:2608.03947v3, Astrophysics of Galaxies, Cosmology and NonGalactic Astrophysics, Diamond Open Access, Diamond Open Access Publishing, Instrumentation and Methods for Astrophysics, Open Access, Open Access Publishing., Solar and Stellar Astrophysics on September 26, 2026 by telescoper

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 eight papers, including one correction to an article already published, bringing the number in Volume 9 (2026) to 217 and the total so far published by OJAp up to 664. This is the third week running that we have published 7 new papers.

The first paper this week was published on Monday 21st September in the folder Solar and Stellar Astrophysics. The title is “The Payne Zero Project I: Stellar Spectra from Physical Models in Seconds” and it is by Yuan-Sen Ting (Ohio State U., USA) and Elliot M. Kim (Cornell U., USA). The study introduces Payne Zero, a tool that reorganizes stellar spectra calculations for GPU-native synthesis, significantly speeding up the process and enabling direct physical fitting and atomic-data calibration at survey scale.

The overlay for this one is here:

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

The second paper for this week, published on Tuesday 22nd September, is titled “RUBIES: The Evolution of the Ionization Parameter from 0 < z < 9” and is in the folder Astrophysics of Galaxies. The authors are Nikko Cleri (Penn State U., USA) and 12 others based in the USA, Switzerland and Germany. The article involves an examination of the time evolution of the ionization parameter in galaxies, finding that it increases with redshift and specific star formation rate, and decreases with stellar mass.

The overlay looks like this:

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

The third paper of the week, also published on Tuesday 22nd September 2026 and in the folder Astrophysics of Galaxies, is “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 all around the world. This study examines gas kinematics in the relaxed, AGN-feedback-free galaxy cluster A3571 using XRISM observations. Findings suggest sloshing motions may significantly contribute to the heating budget.

The overlay is here:

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

The fourth paper of the week, the first of three published on Wednesday 23rd September, is “The Simons Observatory: Development of a Pipeline to Detect Rapid Transients in Time-Ordered Data” by Justin Clancy (U. Melbourne, Australia) and 16 others from around the world. The study introduces a method for detecting fast, dynamic astrophysical transients using cosmic microwave background survey telescopes, demonstrating its effectiveness in the Simons Observatory time-domain pipeline. It is in the folder Instrumentation and Methods for Astrophysics.

The overlay is here:

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

The fifth paper of the week is “Fisher Forecasting for the DESC with Augur” by Paul Rogozenski (Carnegie Mellon U., USA) and 16 others on behalf of the The LSST Dark Energy Science CollaborationThis was also published on Wednesday 16th September, but in the folder Cosmology and Nongalactic Astrophysics. This paper introduces the Augur tool, designed to provide Fisher forecasts for cosmological inference for the Vera C. Rubin Observatory Legacy Survey of Space and Time (LSST).

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:

The sixth paper of the week is “Profile Analysis of the Multiwavelength 2.1-year Oscillations of PG 1553+113” by Pablo Penil (Clemson U. USA) and 7 others based in the USA, Germany and Spain. This was also published on Wednesday 23rd September, in the Astrophysics of Galaxies. The study examines the oscillation profiles of blazar PG~1553+113, finding that its 2.1-year periodicity is not strictly sinusoidal and varies across energy bands.

The overlay is here:

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

Our seventh, and last, new paper of the week is “Radial Pulsations in Polaris: A Secondary Science Application of Cherenkov Telescopes via Intensity Interferometry” by Km Nitu Rai (IISER, India), Prasenjit Saha (U. Zurich, Switzerland) and Subrata Sarangi (IUCAA, India). This study demonstrates how Cherenkov telescopes, typically unused during moonlit nights, can be used for advanced optical stellar measurements, particularly for characterizing bright stars such as Polaris.

The overlay is here:

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

And finally we have one (minor) correction to a previously published article. The overlay of the correction notice is here:

The mastodon announcement is here:

The corrected version of this paper can be found on arXiv here.

That concludes this week’s update. I’ll just add a mention of yesterday’s post announcing that the Open Journal of Astrophysics is a Q1 Journal. It will be interesting to see if that stimulates another increase in submissions. As things are going we seem likely to publish about 300 papers this year. I’ll also mention that an exciting development is in the pipeline for next week, but I can’t say more until it happens.

1 Comment »

Weekly Update from the Open Journal of Astrophysics 19/09/2026

Posted in OJAp Papers, Open Access, The Universe and Stuff with tags arXiv:2508.00071v2, arXiv:2512.13682v2, arXiv:2512.15964v3, arXiv:2602.11270v2, arXiv:2603.10107v3, arXiv:2606.12137v2, arXiv:2608.02755v2, Astrophysics of Galaxies, Cosmology and NonGalactic Astrophysics, Diamond Open Access, Diamond Open Access Publishing, Instrumentation and Methods for Astrophysics, Open Access, Open Access Publishing., Solar and Stellar Astrophysics on September 19, 2026 by telescoper

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 209 and the total so far published by OJAp up to 656. This is the second week running that we have published 7 papers.

The first paper this week was published on Monday 14th September in the folder Cosmology and Nongalactic Astrophysics. The title is “The Power of DESI for Photometric Redshift Calibration: A Case Study with KiDS-1000” and it is by Diana Blanco (UC Santa Cruz, USA) and 66 others distributed internationally. This study explores using the Dark Energy Spectroscopic Instrument (DESI) to calibrate photometric redshift distributions for gravitational lensing, which could improve understanding of dark energy and cosmic structure. In fact this paper was ready for publication a few months ago, but the first author left for another job before putting the final version on arXiv so it took a while to finish it.

The overlay for this one is here:

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

The second paper for this week, published on Tuesday 15th September in the folder Solar and Stellar Astrophysics, is “Exploration of groups and outliers in Gaia RVS stellar spectra with metric learning” by Yarden Eilat Bloch & Dovi Poznanski (Tel-Aviv U., Israel), Nick L. J. Cox & Emmanuel Bernhard (ACRI-ST, Grasse, France), Iain McDonald (U. Manchester, UK), Manuela Rauch (Know Center, GmbH, Graz, Austria), and Albert Zijlstra (Manchester). This article presents a new dataset and interactive portal that applies advanced techniques to analyze and visualize nearly a million spectra from the Gaia mission, potentially revealing undiscovered stellar phenomena.

The overlay looks like this:

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

The third paper of the week, published on Wednesday 16th September in the folder Instrumentation and Methods for Astrophysics is “XID+PRIMA, II: Stepping Through Hyperspectral Imaging to Deblend PRIMAger Beyond the Extragalactic Confusion Limit” by James M. S. Donnellan (U. Sussex, UK) and 12 others based in the UK, France, USA, and The Netherlands. This article explains how PRobe far-Infrared Mission for Astrophysics (PRIMA) uses a new Bayesian modelling approach to map large areas with unprecedented sensitivity. Overcoming confusion noise limitations, enables robust detection of IR-luminous galaxies

The overlay is here:

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

The fourth paper of the week, also published on Wednesday 16th September but in the folder Astrophysics of Galaxies is “The Curious Case of Centaurus A: On the Subject of the Quenched satellites” by Sachi Weerasooriya (Carnegie Obs., USA) and 8 others based in the USA and Canada. This study investigates the lack of luminous satellite galaxies in Centaurus A’s inner regions, suggesting that AGN-driven thermal feedback could suppress star formation, affecting the survival and evolution of satellites

The overlay is here:

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

The fifth paper of the week is “A Unified Halo Mass Function Across Dark Matter Models from High-Resolution Multi-Scale Simulations” by Andrew Benson (Carnegie Institute for Science), Ethan O. Nadler (UC San Diego), and Xiaolong Du & Vera Gluscevic (UCLA) – all based in the USA. This was also published on Wednesday 16th September, but in the folder Cosmology and Nongalactic Astrophysics.

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/117279676509847324

The penultimate, sixth, paper of the week is “Weak-lensing Shear-Selected Galaxy Clusters from the Hyper Suprime-Cam Subaru Strategic Program: III. A precision cosmological sample enabled by optical confirmation” by I-Non Chiu (National Cheng Kung U., Taiwan) and 11 others from around the world. This was published on Thursday 17th September in the folder Cosmology and Nongalactic Astrophysics. The overlay is here:

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

Last, but by no means least, we have our seventh paper of the week: “The Cosmological Simulation Code OpenGadget3 – Implementation of Self-Interacting Dark Matter” by Moritz S. Fischer (Donastia International Physics Center, Spain) and 9 others based in Germany, Italy, USA , Sweden and Denmark. This was published on Friday 18th September (i.e. yesterday) in the folder Instrumentation and Methods for Astrophysics. This paper discusses the use of OpenGadget3, a tool for simulating self-interacting dark matter (SIDM), and highlights its capabilities, performance, and areas for improvement.

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/117291507209099359

That concludes this week’s update. At the rate we’re going we could well reach 300 by the end of the year, but we’ll just have to wait and see about that. I’ll do another next weekend.

1 Comment »

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

Posted in OJAp Papers, Open Access, The Universe and Stuff with tags arXiv:2511.11804v2, arXiv:2601.14422v3, arXiv:2601.20966v2, arXiv:2603.11015v2, arXiv:2606.05971v2, arXiv:2606.20201v3, arXiv:2609.07825v1, Astrophysics of Galaxies, Diamond Open Access, Diamond Open Access Publishing, Earth and Planetary Astrophysics, High-Energy Astrophysical Phenomena, Open Access, Open Access Publishing., Solar and Stellar Astrophysics on September 12, 2026 by telescoper

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.

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:

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:

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:

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:

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:

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:

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:

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.

1 Comment »

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

Posted in OJAp Papers, Open Access, The Universe and Stuff with tags arXiv2509.03576v2, arXiv:2505.14787v4, arXiv:2604.05019v2, arXiv:2604.23794v3, arXiv:2608.27892v1, Astrophysics of Galaxies, Diamond Open Access, Diamond Open Access Publishing, Earth and Planetary Astrophysics, High-Energy Astrophysical Phenomena, Open Access, Open Access Publishing., Solar and Stellar Astrophysics on September 5, 2026 by telescoper

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:

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:

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:

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:

That concludes the new papers for the week, but there is one additional announcement in the form of a correction to a previously published paper:

The updated paper can be found on arXiv here and the Fediverse announcement here:

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.

So ends this week’s update.

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Weekly Update from the Open Journal of Astrophysics 29/08/2026

Posted in OJAp Papers, Open Access, The Universe and Stuff with tags arXiv:2507.03074v2, arXiv:2508.16759v2, arXiv:2509.25399v2, arXiv:2512.18076v2, arXiv:2602.21863v3, arXiv:2603.22400v2, arXiv:2604.07068v2, arXiv:2604.22048v3, arXiv:2604.27161v2, arXiv:2606.30129v2, arXiv:2608.23459v1, arXiv:2608.26513v1, Astrophysics of Galaxies, Cosmology and NonGalactic Astrophysics, Diamond Open Access, Diamond Open Access Publishing, Earth and Planetary Astrophysics, High-Energy Astrophysical Phenomena, Instrumentation and Methods for Astrophysics, Open Access, Open Access Publishing., Solar and Stellar Astrophysics on August 29, 2026 by telescoper

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:

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:

The third paper of the week, yet another one published on Monday 24th August this time in the folder Instrumentation and Methods for Astrophysics is “Differentiable Forward Modeling for Efficient and Accurate Shear Inference” by Ismael Mendoza and 7 others on behalf of the LSST Dark Energy Science Collaboration. This study presents a modern implementation of the Bayesian shear inference framework for measuring cosmic shear signal in dark energy optical surveys, requiring no external calibration to handle noise bias.

The overlay is here:

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

The fourth paper of the week, published on Tuesday 25th August in the folder Solar and Stellar Astrophysics is “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 overlay is here:

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

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:

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:

Paper number seven for the week is “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. This was published on Tuesday 25th August in the folder Astrophysics of Galaxies. The paper presents an extensive spectroscopic catalog and other data products for the EBOSS galaxy sample, opening the door to a new generation of studies in galaxy evolution and cosmology.

The overlay for this paper looks like this:

The officially-accepted paper can be found on arXiv here and the fediverse announcement follows

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

The ninth paper of the week is “Visualizing Disequilibrium: Tracing Two-Point Correlations to Specific Spatial Structures in the Milky Way” by Austin Hinkel and Josephine Vanzant (Thomas More U. USA). This paper, published on Friday 27th August in the folder Astrophysics of Galaxies, presents an algorithm that enhances the Two-Point Correlation Function, enabling detailed visualization of spatial clustering and complex structures in the Milky Way.

The overlay for this one looks like this:

You can find the officially-accepted version of the paper on arXiv here and the fediverse announcement is here:

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:

The penultimate paper of the week, the eleventh, is “The Impact of Non-Gaussian Line Spread Functions on Stellar Kinematic Recovery: Consequences for Dynamical Models” by David A. Simon (Oxford University, UK). This article was also published on 28th August 2026 in the folder Astrophysics of Galaxies. It explores the impact of non-Gaussian line spread function (LSF) profiles on stellar kinematics recovery. A method was developed to reduce bias in dispersion, with a Python implementation available.

A screenshot of the overlay for this one is here:

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

The last paper of the twelve to announce this week is “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. This was also published on Friday 28th August 2026, but in the folder Cosmology and Nongalactic Astrophysics. The study forecasts cosmological parameter constraints for a cosmic shear analysis of the Rubin Observatory Legacy Survey of Space and Time (LSST), emphasizing the need for improved methods. This is what the overlay looks like:

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

And that concludes the papers for this week, which turned out to be a bumper one! I’ll do another update next weekend.

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Weekly Update from the Open Journal of Astrophysics 22/08/2026

Posted in OJAp Papers, Open Access, The Universe and Stuff with tags arXiv:2602.00820v2, arXiv:2604.18688v2, arXiv:2605.13472v2, arXiv:2606.06270v2, arXiv:2606.17270v2, arXiv:2607.00167v2, Astrophysics of Galaxies, Cosmology and NonGalactic Astrophysics, Diamond Open Access, Diamond Open Access Publishing, Open Access, Open Access Publishing., Solar and Stellar Astrophysics on August 22, 2026 by telescoper

Later than usual, 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 six papers, bringing the number in Volume 9 (2026) to 177 and the total so far published by OJAp up to 625.

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

The first one up this week was published on Tuesday 18th August in the folder Astrophysics of Galaxies. The article “Ghostly DLAs in SDSS DR16” by Patrick Petitjean (Institut d’Astrophysique de Paris, France). This study revisits the origin of proximate damped Lyman-alpha absorbers (PDLAs), associating most with the AGN or quasar host galaxy environment..

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

The second paper for this week, also published on Tuesday 18th August in the folder Astrophysics of Galaxies is “Dust in the Average Galaxy: Attenuation, Emission, and Opacity from 0<z<7” by Caitlin M. Casey (University of California Santa Barbara, USA) and an international cast of 45 others. This study analyzes over 500,000 galaxies to understand dust emission and attenuation properties. Findings reveal UV/optical attenuation underestimates IR luminosity, and dust constraints are crucial for understanding star-forming galaxies.

The overlay looks like this:

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

The third paper of the week, yet another one published on Tuesday 18th August Astrophysics of Galaxies, is “First Light And Reionization Epoch Simulations (FLARES) XXI: The UV Indices of Galaxies in the Early Universe” by Connor Sant Fournier (University of Malta, Malta) and 7 others based in Malta and the UK. This study uses synthetic spectral modelling and cosmological simulations to assess UV absorption line indices as reliable tracers of stellar metallicity in high-redshift galaxies.

The overlay is here:

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

The fourth paper of the week is “White dwarf + M dwarf Detached Binaries in Long Period Radio Transients: Observed Binary Parameters, Evolution, and Population Constraints” by Antonio Rodriguez (Harvard-Smithsonian CfA, USA), Kareem El-Badry (Caltech, USA), Iris de Ruiter (U. Sydney, Australia), Kaustubh Rajwade (U. Oxford, UK), Edo Berger & Liam Connor (CfA) and Natasha Hurley-Walker (Curtin U., Australia). This was published on Wednesday 19th August in the folder Solar and Stellar Astrophysics. This article presents new findings on long period radio transients (LPTs), slow-pulsing radio sources, associated with M dwarf-white dwarf systems., suggests these systems are part of a significant Galactic population of such objects.

The overlay is here:

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

The fifth paper of the week is “Cosmological Dynamics of Multi-Axion Quintessence” by Supakorn Katewongveerachart (Mahidol U., Thailand) and David J. E. Marsh, King’s College London, UK). This was published on Thursday 20th August 2026 in the folder Cosmology and Nongalactic Astrophysics. This study explores dark energy dynamics, and their potential observational consequences, for a cosmological model with two, three or four axion fields.

The overlay is here:

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

Finally for this week, the sixth paper of the week is “How can we finally see the first light? Status and perspective in the search for Population III stars” by Alessandra Venditti (U. Texas Austin, USA) and 28 others from around the world. This was published on Thursday August 20th in the folder Astrophysics of Galaxies. This review article discusses the ongoing search for the first stars (Population III), their formation, and characteristics. It highlights various observational strategies and the role of advanced technology in this quest. This can perhaps act as a reminder that we do publish review articles, as long as the Editorial Board and the reviewers consider them a useful contribution to the literature.

The overlay is here:

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

And that’s all for this week. We’re starting to clear the backlog of papers accepted through the summer but yet to be published, but it will probably take a few weeks to do so completely.

2 Comments »

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

Posted in OJAp Papers, Open Access, The Universe and Stuff with tags arXiv:2511.01361v3, arXiv:2601.02886v3, arXiv:2604.06314v2, arXiv:2604.23823v2, Astrophysics of Galaxies, blazars, cosmic homogeneity, cosmological principle, Cosmology and NonGalactic Astrophysics, Diamond Open Access, Diamond Open Access Publishing, dust grains, galaxy evolution, galaxy formation, gamma-ray astronomy, GLIMPSE survey, High-Energy Astrophysical Phenomena, high-energy cosmic rays, hydrodynamic simulations, neutrinos, Open Access, Open Access Publishing., peculiar velocities on August 15, 2026 by telescoper

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

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

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

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

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:

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

The overlay is here:

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

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:

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!

1 Comment »

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

Posted in OJAp Papers, Open Access, The Universe and Stuff with tags air showers, arXiv:2601.14887v3, arXiv:2604.13154v2, arXiv:2604.24908v2, arXiv:2605.05004v2, Astrophysics of Galaxies, Circumgalactic Medium, Cosmology and NonGalactic Astrophysics, Diamond Open Access, Diamond Open Access Publishing, Galactic Outflows, Gravitational Lensing, high-energy cosmic rays, Hubble Space Telescope, hydrodynamic simulations, Instrumentation and Methods for Astrophysics, Open Access, Open Access Publishing., peculiar velocities, quasars, star-forming galaxy, structure functions, Turbulence, ultra-high energy cosmic rays on August 8, 2026 by telescoper

Although it’s 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 167 and the total so far published by OJAp up to 615.

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

The first paper to report this week was published on Tuesday 4th August in the folder Astrophysics of Galaxies with the title “Small-scale turbulence alongside large-scale turbulence in a z=1.87 star-forming galaxy with an outflowing wind, revealed by multi-point structure functions” by Itzhak Goldman (Afeka College, Israel). A previous study by the author found evidence of large and small scale turbulence in the star-forming galaxy CSWA13, suggesting that star clusters and large clumps within the galaxy could be driving this turbulence.

The overlay for this paper is here

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

The second paper for this week, published on Thursday 6th August in the folder Astrophysics of Galaxies, is “From Clumps to Sheets: Geometry Controls the Temperature PDF of Multi-Phase Gas” by Zirui Chen and S. Peng Oh (UC Santa Barbara, USA). This study uses 3D hydrodynamic simulations to show that the temperature probability distribution functions (PDFs) of multi-phase turbulent gas differ significantly under interstellar medium (ISM) and circumgalactic medium (CGM) conditions.

The overlay looks like this:

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

The third paper of the week, published on Thursday 6th August in folder Instrumentation and Methods for Astrophysics is “First Detection of Extensive Air Showers Using a Small-Aperture Fluorescence Telescope” by M. Zotov (M.V. Lomonosov Moscow State University, Russia) and 7 others based in Russia and Armenia. The study reports the first-ever detection of extensive air showers from ultra-high-energy cosmic rays using a compact fluorescence telescope, employing both conventional and deep learning analysis methods.

The overlay is here:

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

The fourth and final paper of the week was published on Friday 7th August in the folder Cosmology and Nongalactic Astrophysics: “TDCOSMO XXVI: Uniform Lens Modeling of Eight Doubly Imaged Quasars“, by Ryan Brady (Stony Brook University, USA) and 9 others based all around the world, presents a new method for analyzing doubly imaged quasars using the Hubble Space Telescope, revealing that arc surface brightness is key to precision in mass model measurements.

The overlay is here:

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

That’s all for this week. We have about a dozen more papers accepted and waiting for the authors to put the final version on arXiv, which they will presumably do when they’re back from holiday. I’ll do an update next weekend and we’ll see!

1 Comment »

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