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The Open Journal of Astrophysics

@ojastro

A peer-reviewed Diamond Open-Access Astrophysics journal using an arXiv overlay. This community-run service is provided entirely free for authors and readers. https://astro.theoj.org/

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Latest posts by The Open Journal of Astrophysics @ojastro

Linear map-making with LuSEE-Night | Published in The Open Journal of Astrophysics By Hugo Camacho, Kaja M. Rotermund & 33 more. LuSEE-Night is a lunar radio telescope using four antennas to map the sub-50 MHz sky with a 5-degree resolution, using the Wiener filter algorithm to mana...

New Publication at the Open Journal of Astrophysics: "Linear map-making with LuSEE-Night" by Hugo Camacho (Brookhaven National Laboratory, USA) and 34 others based in the USA, France, and the Netherlands.

doi.org/10.33232/001...

05.03.2026 07:28 πŸ‘ 1 πŸ” 1 πŸ’¬ 0 πŸ“Œ 0
Comments on "Little ado about everything" by A. Lapi et al. and on cosmological back-reaction | Published in The Open Journal of Astrophysics By Julian Adamek. The author critiques A. Lapi et al.'s Ξ·CDM model, arguing that their claim of accelerated universe expansion driven by density field fluctuations is implausible.

New Publication at the Open Journal of Astrophysics: "Comments on β€œLittle ado about everything” by A. Lapi et al. and on cosmological back-reaction" by Julian Adamek (UniversitΓ€t ZΓΌrich, Switzerland)

doi.org/10.33232/001...

04.03.2026 08:15 πŸ‘ 1 πŸ” 1 πŸ’¬ 0 πŸ“Œ 0

About 30 papers have been added over the weekend, so it looks like the pipeline has been unblocked!

02.03.2026 14:27 πŸ‘ 0 πŸ” 1 πŸ’¬ 0 πŸ“Œ 0
A Semi-Supervised Learning Method for the Identification of Bad Exposures in Large Imaging Surveys | Published in The Open Journal of Astrophysics By Yufeng Luo, Adam D. Myers & 8 more. A machine-learning approach for detecting poor-quality exposures in large astronomical imaging surveys, proving efficient and accurate in identifying problematic...

New Publication at the Open Journal of Astrophysics: "A Semi-Supervised Learning Method for the Identification of Bad Exposures in Large Imaging Surveys" by Yufeng Luo (U. Wyoming, USA) and 8 others from the DESI Legacy Imaging Surveys Team

doi.org/10.33232/001...

27.02.2026 08:53 πŸ‘ 0 πŸ” 1 πŸ’¬ 0 πŸ“Œ 0
The Rise of Ionized Gas Filaments in Early-Type Galaxies | Published in The Open Journal of Astrophysics By Ryan Eskenasy, Valeria Olivares & 1 more. An exploration of the formation of multiphase filamentary nebulae in early-type galaxies (ETGs), using VLT-MUSE IFU observations of 126 non-central ETGs, f...

New Publication at the Open Journal of Astrophysics: "The Rise of Ionized Gas Filaments in Early-Type Galaxies" by Ryan Eskenasy (U. Kentucky, USA), Valeria Olivares (Universidad de Santiago de Chile) and Yuanyuan Su (U. Kentucky, USA)

doi.org/10.33232/001...

26.02.2026 07:39 πŸ‘ 1 πŸ” 0 πŸ’¬ 0 πŸ“Œ 0
Relationship Between Major Stellar Physical Parameters and Normal Mode Frequencies in Accreting White Dwarf Stars | Published in The Open Journal of Astrophysics By Praphull Kumar, Dean M. Townsley & 1 more. This study presents a new method for identifying pulsation modes in white dwarfs, improving upon previous models by using more realistic parameters and co...

New Publication at the Open Journal of Astrophysics: "Relationship Between Major Stellar Physical Parameters and Normal Mode Frequencies in Accreting White Dwarf Stars" by Praphull Kumar, Dean M. Townsley and Hunter Anz (U. Alabama, USA)

doi.org/10.33232/001...

26.02.2026 07:38 πŸ‘ 0 πŸ” 0 πŸ’¬ 0 πŸ“Œ 0

We are aware that it is taking longer than usual for our 2026 papers to appear in NASA/ADS. This is a known issue and we expect the backlog will be cleared soon. Thank you for your patience.

24.02.2026 10:10 πŸ‘ 1 πŸ” 0 πŸ’¬ 0 πŸ“Œ 1
HelioSpectrotron 5000: an interactive solar atlas | Published in The Open Journal of Astrophysics By Alexander G.M. Pietrow. The HelioSpectrotron~5000 (HS5000) is an interactive solar spectral atlas that allows comparison between high-resolution spectra and ground-based instrument observations, ai...

New Publication at the Open Journal of Astrophysics: "HelioSpectrotron 5000: an interactive solar atlas" by Alexander G.M. Pietrow (AIP Potsdam, Germany)

doi.org/10.33232/001...

24.02.2026 07:36 πŸ‘ 1 πŸ” 0 πŸ’¬ 0 πŸ“Œ 1
Feedback shaped the galaxy morphological sequence in presence of mergers | Published in The Open Journal of Astrophysics By Masafumi Noguchi. This study suggests that galaxy morphology, specifically the mass ratios of bulges and disks, is influenced by galaxy mergers and feedback processes from active galactic nuclei an...

New Publication at the Open Journal of Astrophysics: "Feedback shaped the galaxy morphological sequence in presence of mergers" by Masafumi Noguchi (Tohoku University, Japan)

doi.org/10.33232/001...

24.02.2026 07:22 πŸ‘ 0 πŸ” 0 πŸ’¬ 0 πŸ“Œ 0
Redshift Assessment Infrastructure Layers (RAIL): Rubin-era photometric redshift stress-testing and at-scale production | Published in The Open Journal of Astrophysics By The RAIL Team, Jan Luca van den Busch & 33 more. The study introduces Redshift Assessment Infrastructure Layers (RAIL), an open-source Python library for large-scale probabilistic photo-z estimatio...

New Publication at the Open Journal of Astrophysics: "Redshift Assessment Infrastructure Layers (RAIL): Rubin-era photometric redshift stress-testing and at-scale production" by the RAIL Team (31 authors) and the Dark Energy Science Collaboration

doi.org/10.33232/001...

23.02.2026 08:33 πŸ‘ 0 πŸ” 1 πŸ’¬ 0 πŸ“Œ 0
MEGATRON: Disentangling Physical Processes and Observational Bias in the Multi-Phase ISM of High-Redshift Galaxies | Published in The Open Journal of Astrophysics By Nicholas Choustikov, Harley Katz & 11 more. The study uses MEGATRON simulations to analyze the interstellar medium (ISM) of high-redshift galaxies, finding it denser and less metal-enriched than lo...

New Publication at the Open Journal of Astrophysics: "MEGATRON: Disentangling Physical Processes and Observational Bias in the Multi-Phase ISM of High-Redshift Galaxies" by Nicholas Choustikov (U. Oxford, UK) and 12 others based in UK, USA, France, Korea and Belgium

doi.org/10.33232/001...

23.02.2026 08:03 πŸ‘ 0 πŸ” 1 πŸ’¬ 0 πŸ“Œ 0
The Impact of Baryonic Effects on the Dynamical Masses Inferred Using Satellite Kinematics | Published in The Open Journal of Astrophysics By Josephine F.W. Baggen, Frank C. van den Bosch & 1 more. A model to assess the impact of stars and gas on satellite kinematics, showing that these baryonic effects can reduce the satellite velocity ...

New Publication at the Open Journal of Astrophysics: "The Impact of Baryonic Effects on the Dynamical Masses Inferred Using Satellite Kinematics" by Josephine F.W. Baggen, Frank C. van den Bosch, and Kaustav Mitra (Yale U., USA)

doi.org/10.33232/001...

23.02.2026 07:48 πŸ‘ 0 πŸ” 1 πŸ’¬ 0 πŸ“Œ 0
A Bayesian Exploration of The Mass of the Ursa Major III: Kinematics, Rotation and their influence on the Mass to Light Ratio | Published in The Open Journal of Astrophysics By Tim R. Adams, Brendon J. Brewer & 1 more. An investigation of the kinematics of potential ultra-faint dwarf galaxy UMa III/U1, finding a preference for a non-rotating model; the object's nature rem...

New Publication at the Open Journal of Astrophysics: "A Bayesian Exploration of The Mass of the Ursa Major III: Kinematics, Rotation and their influence on the Mass to Light Ratio" by Tim R. Adams (U. Sydney), Brendon J. Brewer (U. Auckland) and Geraint F. Lewis (Sydney)

doi.org/10.33232/001...

23.02.2026 07:37 πŸ‘ 0 πŸ” 1 πŸ’¬ 0 πŸ“Œ 0
Call for Editors | Published by The Open Journal of Astrophysics The number of papers submitted to the Open Journal of Astrophysics continues to rise, so we're looking for more volunteers to join the Editorial Board.

astro.theoj.org/post/3748-ca...

22.02.2026 19:35 πŸ‘ 1 πŸ” 0 πŸ’¬ 0 πŸ“Œ 0
Preview
Call for Editors at the Open Journal ofΒ Astrophysics The number of papers submitted to the Open Journal of Astrophysics continues to rise, as demonstrated by this nice graphic which shows the stats for new submissions for the last five years: It's very clear that the thicket is getting thicker! The increasing number of articles is of course very welcome indeed, but it is increasing the load on our Editorial Board and that includes me!

Call for Editors at the Open Journal ofΒ Astrophysics

The number of papers submitted to the Open Journal of Astrophysics continues to rise, as demonstrated by this nice graphic which shows the stats for new submissions for the last five years: It's very clear that the thicket is getting thicker!…

22.02.2026 14:23 πŸ‘ 9 πŸ” 9 πŸ’¬ 1 πŸ“Œ 1
Ultra-long Gamma-ray Bursts from Micro-Tidal Disruption Events: The Case of GRB 250702B | Published in The Open Journal of Astrophysics By Paz Beniamini, Hagai B. Perets & 1 more. The study interprets ultra-long gamma-ray bursts (ULGRBs), specifically GRB 250702B, as micro-tidal disruption events (Β΅TDEs), where a stellar-mass black ho...

New Publication at the Open Journal of Astrophysics: "Ultra-long Gamma-ray Bursts from Micro-Tidal Disruption Events: The Case of GRB 250702B" by Paz Beniamini (Open University, IL), Hagai B. Perets (Technion, IL) and Jonathan Granot (Open University, IL)

doi.org/10.33232/001...

20.02.2026 08:44 πŸ‘ 0 πŸ” 0 πŸ’¬ 0 πŸ“Œ 0
JWST observations of three long-period AM CVn binaries: detection of the donors and hints of magnetically truncated disks | Published in The Open Journal of Astrophysics By Kareem El-Badry, Antonio C. Rodriguez & 2 more. High-cadence infrared spectroscopy used to analyze three long-period, eclipsing AM CVn binaries; findings suggest the presence of magnetized white dw...

New Publication at the Open Journal of Astrophysics: "JWST observations of three long-period AM CVn binaries: detection of the donors and hints of magnetically truncated disks" by
Kareem El-Badry (Caltech) and 3 others based in the USA.

doi.org/10.33232/001...

18.02.2026 08:17 πŸ‘ 5 πŸ” 1 πŸ’¬ 0 πŸ“Œ 0
Post image

Here's an interesting review of astrophysics papers on arXiv, including pertinent comments on the absurdity of the publishing system and this mention of @ojastro.bsky.social

arxiv.org/abs/2602.12303

17.02.2026 20:42 πŸ‘ 12 πŸ” 4 πŸ’¬ 1 πŸ“Œ 0
Screenshot from the frontpage of the Open Journal of Astrophysics, featuring the following article informations. Title reads "Revisiting the Great Attractor: The Local Group's streamline trajectory, cosmic velocity and dynamical fate". Authors list: Richard Stiskalek, Harry Desmond, Stuart McAlpine, Guilhem Lavaux, Jens Jasche, Michael J. Hudson. Summary reads "The study revisits the Great Attractor concept, finding that it doesn't dominate the Local Group's cosmic velocity; multiple structures contribute to the motion, with no single attractor accounting for it". Dated February 17, 2026. Background image featuring an allsky map of the depth of the inferred Classical Great Attractor basin as a function of sky position in Galactic coordinates.

Screenshot from the frontpage of the Open Journal of Astrophysics, featuring the following article informations. Title reads "Revisiting the Great Attractor: The Local Group's streamline trajectory, cosmic velocity and dynamical fate". Authors list: Richard Stiskalek, Harry Desmond, Stuart McAlpine, Guilhem Lavaux, Jens Jasche, Michael J. Hudson. Summary reads "The study revisits the Great Attractor concept, finding that it doesn't dominate the Local Group's cosmic velocity; multiple structures contribute to the motion, with no single attractor accounting for it". Dated February 17, 2026. Background image featuring an allsky map of the depth of the inferred Classical Great Attractor basin as a function of sky position in Galactic coordinates.

Great paper on the Great Attractor, just published by The Open Journal of Astrophysics

doi.org/10.33232/001...

@ojastro.bsky.social πŸ§ͺ #Cosmology #Cosmicflows

17.02.2026 09:59 πŸ‘ 24 πŸ” 7 πŸ’¬ 0 πŸ“Œ 0
Revisiting the Great Attractor: The Local Group's streamline trajectory, cosmic velocity and dynamical fate | Published in The Open Journal of Astrophysics By Richard Stiskalek, Harry Desmond & 4 more. The study revisits the Great Attractor concept, finding that it doesn't dominate the Local Group's cosmic velocity; multiple structures contribute to the ...

New Publication at the Open Journal of Astrophysics: "Revisiting the Great Attractor: The Local Group’s streamline trajectory, cosmic velocity and dynamical fate" by Richard Stiskalek (Oxford U., UK) and 5 others based in the UK, France, Sweden and Canada

doi.org/10.33232/001...

17.02.2026 07:34 πŸ‘ 0 πŸ” 1 πŸ’¬ 0 πŸ“Œ 0
DIPLODOCUS II: Implementation of transport equations and test cases relevant to micro-scale physics of jetted astrophysical sources | Published in The Open Journal of Astrophysics By Christopher N Everett, Marc Klinger-Plaisier & 1 more. DIPLODOCUS is a framework developed for particle distribution transport, with its numerical implementation detailed in Diplodocus.jl. It uses ...

New Publication at the Open Journal of Astrophysics: "DIPLODOCUS II: Implementation of transport equations and test cases relevant to micro-scale physics of jetted astrophysical sources" by C N Everett (Oxford), Marc Klinger-Plaisier (Amsterdam) & Garret Cotter (Oxford)

doi.org/10.33232/001...

17.02.2026 07:16 πŸ‘ 0 πŸ” 1 πŸ’¬ 0 πŸ“Œ 0
V717 Andromedae: An Active Low Mass Ratio Contact Binary | Published in The Open Journal of Astrophysics By Surjit S. Wadhwa, Marko GrozdanovicΒ΄ & 3 more. The contact binary V717 Andromedae is an extreme low mass ratio system with high inclination and moderate contact, showing signs of chromospheric acti...

New Publication at the Open Journal of Astrophysics: "V717 Andromedae: An Active Low Mass Ratio Contact Binary" by Surjit S. Wadhwa (Western Sydney U. Australia) and four others based in Australia and Serbia.

doi.org/10.33232/001...

16.02.2026 08:57 πŸ‘ 1 πŸ” 1 πŸ’¬ 0 πŸ“Œ 0
SKA-Low simulations for a cosmic dawn/epoch of reionisation deep field | Published in The Open Journal of Astrophysics By Anna Bonaldi, Philippa Hartley & 8 more. A simulation of an SKA-Low cosmic dawn/epoch of reionisation observation to advance foreground-mitigation approaches: the simulation includes various sky co...

New Publication at the Open Journal of Astrophysics: "SKA-Low simulations for a cosmic dawn/epoch of reionisation deep field" by Anna Bonaldi (Square Kilometre Array Observatory, UK) and 8 others based in the UK, France, Italy and Australia.

doi.org/10.33232/001...

16.02.2026 08:31 πŸ‘ 1 πŸ” 1 πŸ’¬ 0 πŸ“Œ 0

We will investigate listing.

16.02.2026 08:30 πŸ‘ 1 πŸ” 0 πŸ’¬ 0 πŸ“Œ 0
Dynamics in the Cores of Self-Interacting Dark Matter Halos: Reduced Stalling and Accelerated Core Collapse | Published in The Open Journal of Astrophysics By Frank C. van den Bosch, Shashank Dattathri. This study uses simulations to explore core dynamics in self-interacting dark matter (SIDM) halos. Findings suggest strong self-interactions prevent core...

New Publication at the Open Journal of Astrophysics: "Dynamics in the Cores of Self-Interacting Dark Matter Halos: Reduced Stalling and Accelerated Core Collapse" by Frank C. van den Bosch and Shashank Dattathri (Yale University, USA)

doi.org/10.33232/001...

13.02.2026 08:28 πŸ‘ 2 πŸ” 2 πŸ’¬ 0 πŸ“Œ 0
Supermassive black hole growth from stellar binary encounters | Published in The Open Journal of Astrophysics By Aubrey L Jones, Benjamin C Bromley. The study explores the growth of supermassive black holes (SMBHs) through stellar accretion via the Hill's mechanism, predicting capture rates and identifying po...

New Publication at the Open Journal of Astrophysics: "Supermassive black hole growth from stellar binary encounters" by Aubrey L Jones and Benjamin C Bromley (University of Utah, USA)

doi.org/10.33232/001...

12.02.2026 07:32 πŸ‘ 4 πŸ” 1 πŸ’¬ 0 πŸ“Œ 0

Our paper where we test how reliably one can recover galaxy properties using nebular emission lines at high-z due to star-dust geometry and variation in the underlying stellar populations is now published in the OJAp. All the scripts and data to reproduce the results are on GitHub. Do have a read!

11.02.2026 11:30 πŸ‘ 1 πŸ” 3 πŸ’¬ 0 πŸ“Œ 0
Derivative-Aligned Anticipation of Forbush Decreases from Entropy and Fractal Markers | Published in The Open Journal of Astrophysics By Juan D. Perez-Navarro, David Sierra Porta. The study presents a feature-based framework for predicting Forbush decreases in neutron-monitor records using various computational methods. The approach...

New Publication at the Open Journal of Astrophysics: "Derivative-Aligned Anticipation of Forbush Decreases from Entropy and Fractal Markers" by Juan D. Perez-Navarro & David Sierra Porta (Universidad TecnolΓ³gica de BolΓ­var, Colombia)

doi.org/10.33232/001...

11.02.2026 17:21 πŸ‘ 0 πŸ” 0 πŸ’¬ 0 πŸ“Œ 0
Interpreting nebular emission lines in the high-redshift Universe | Published in The Open Journal of Astrophysics By Aswin Payyoor Vijayan, Robert M. Yates & 8 more. This study examines the reliability of diagnostics used to estimate star formation rate and gas-phase oxygen abundance in high-redshift galaxies. It...

New Publication at the Open Journal of Astrophysics: "Interpreting nebular emission lines in the high-redshift Universe" by Aswin P. Vijayan (U. Sussex, UK) and 9 others based in the UK, Taiwan, China and The Netherlands

doi.org/10.33232/001...

11.02.2026 08:22 πŸ‘ 0 πŸ” 0 πŸ’¬ 0 πŸ“Œ 1
Rapid cosmological inference with the two-loop matter power spectrum | Published in The Open Journal of Astrophysics By Thomas Bakx, Henrique Rubira & 2 more. The study uses the COBRA method to compute the two-loop effective field theory power spectrum of dark matter density fluctuations, providing more precise cosm...

New Publication at the Open Journal of Astrophysics: "Rapid cosmological inference with the two-loop matter power spectrum" by Thomas Bakx (Utrecht U., NL), Henrique Rubira (LMU, DE), Nora Elisa Chisari (Utrecht) and Zvonimir Vlah (Ruđer Boőković Institute, Croatia)

doi.org/10.33232/001...

10.02.2026 06:42 πŸ‘ 2 πŸ” 1 πŸ’¬ 0 πŸ“Œ 0