The Open Journal of Astrophysics
@ojastro.bsky.social
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/
https://astro.theoj.org/
The two papers published this morning bring Vol. 8 (2025) to a close. We have published 213 papers this year (201 in the regular issue and 12 in a supplement).
This brings this year's publishing activity to a close. Thank you for your support and we'll see you in 2026 with Vol. 9!
This brings this year's publishing activity to a close. Thank you for your support and we'll see you in 2026 with Vol. 9!
December 24, 2025 at 9:32 AM
The two papers published this morning bring Vol. 8 (2025) to a close. We have published 213 papers this year (201 in the regular issue and 12 in a supplement).
This brings this year's publishing activity to a close. Thank you for your support and we'll see you in 2026 with Vol. 9!
This brings this year's publishing activity to a close. Thank you for your support and we'll see you in 2026 with Vol. 9!
New Publication at the Open Journal of Astrophysics: "Quantifying the Fermi paradox via passive SETI: a general framework" by Matthew Civiletti (City University of New York, USA)
doi.org/10.33232/001...
doi.org/10.33232/001...
Quantifying the Fermi paradox via passive SETI: a general framework | Published in The Open Journal of Astrophysics
By Matthew Civiletti. This study uses SETI observations and the Drake equation to calculate the probability of detecting at least one extraterrestrial signal, highlighting the model's limitations and ...
doi.org
December 24, 2025 at 9:27 AM
New Publication at the Open Journal of Astrophysics: "Quantifying the Fermi paradox via passive SETI: a general framework" by Matthew Civiletti (City University of New York, USA)
doi.org/10.33232/001...
doi.org/10.33232/001...
New Publication at the Open Journal of Astrophysics: "The explosion jets of the core-collapse supernova remnant Circinus X-1" by Noam Soker and Muhammad Akashi (Technion, Haifa, Israel)
doi.org/10.33232/001...
doi.org/10.33232/001...
The explosion jets of the core-collapse supernova remnant Circinus X-1 | Published in The Open Journal of Astrophysics
By Noam Soker, Muhammad Akashi. The study suggests that the rings in the Circinus X-1 supernova remnant resulted from jet-driven explosions, supporting the jittering-jets explosion mechanism theory fo...
doi.org
December 24, 2025 at 9:15 AM
New Publication at the Open Journal of Astrophysics: "The explosion jets of the core-collapse supernova remnant Circinus X-1" by Noam Soker and Muhammad Akashi (Technion, Haifa, Israel)
doi.org/10.33232/001...
doi.org/10.33232/001...
New Publication at the Open Journal of Astrophysics: "On the statistical convergence of N-body simulations of the Solar System" by Hanno Rein, Garett Brown and Mei Kanda (U. Toronto, Canada)
doi.org/10.33232/001...
doi.org/10.33232/001...
On the statistical convergence of N-body simulations of the Solar System | Published in The Open Journal of Astrophysics
By Hanno Rein, Garett Brown & 1 more. This study presents numerical experiments to determine the minimum timestep for long-term simulations of the Solar System, finding that timesteps up to 32 days yi...
doi.org
December 23, 2025 at 9:50 AM
New Publication at the Open Journal of Astrophysics: "On the statistical convergence of N-body simulations of the Solar System" by Hanno Rein, Garett Brown and Mei Kanda (U. Toronto, Canada)
doi.org/10.33232/001...
doi.org/10.33232/001...
New Publication at the Open Journal of Astrophysics: "Transverse Velocities in Real-Time Cosmology: Position Drift in Relativistic N-Body Simulations" by A. Oestreicher (U Southern Denmark), C. Clarkson (QMUL), J. Adamek (U Zürich) & Sofie M. Koksbang (U Southern Denmark)
doi.org/10.33232/001...
doi.org/10.33232/001...
Transverse Velocities in Real-Time Cosmology: Position Drift in Relativistic N-Body Simulations | Published in The Open Journal of Astrophysics
By Alexander Oestreicher, Chris Clarkson & 2 more. This study uses the general relativistic N-body simulation code to explore how cosmological structures affect position drift measurements, a new meth...
doi.org
December 23, 2025 at 9:35 AM
New Publication at the Open Journal of Astrophysics: "Transverse Velocities in Real-Time Cosmology: Position Drift in Relativistic N-Body Simulations" by A. Oestreicher (U Southern Denmark), C. Clarkson (QMUL), J. Adamek (U Zürich) & Sofie M. Koksbang (U Southern Denmark)
doi.org/10.33232/001...
doi.org/10.33232/001...
We are pleased to announce the publication today (19th December 2025) of a special issue consisting of a series of papers about various aspects of Pulsar Science with the Square Kilometre Array Observatory.
Links to the individual papers follow in a thread....
astro.theoj.org/issue/13006
Links to the individual papers follow in a thread....
astro.theoj.org/issue/13006
Vol. 8 Supplement, Issue 1, 2025 | Published by The Open Journal of Astrophysics
Highlights of the expected outcomes from the upcoming
SKA Observatory with game-changing large instantaneous
sensitivity, wide frequency coverage and flexible observation modes
astro.theoj.org
December 19, 2025 at 11:35 AM
We are pleased to announce the publication today (19th December 2025) of a special issue consisting of a series of papers about various aspects of Pulsar Science with the Square Kilometre Array Observatory.
Links to the individual papers follow in a thread....
astro.theoj.org/issue/13006
Links to the individual papers follow in a thread....
astro.theoj.org/issue/13006
New Publication at the Open Journal of Astrophysics: "What is the contribution of gravitational infall on the mass assembly of star-forming clouds? A case study in a numerical simulation of the interstellar medium" by Noé Brucy (Lyon) et al.
doi.org/10.33232/001...
doi.org/10.33232/001...
What is the contribution of gravitational infall on the mass assembly of star-forming clouds? A case study in a numerical simulation of the interstellar medium | Published in The Open Journal of Astro...
By Noé Brucy, Enrique Vázquez-Semadeni & 3 more. Using numerical simulations to quantify how much of the mass inflow into a star-forming cloud is driven by the self-gravity of the gas and the gravity ...
doi.org
December 19, 2025 at 8:34 AM
New Publication at the Open Journal of Astrophysics: "What is the contribution of gravitational infall on the mass assembly of star-forming clouds? A case study in a numerical simulation of the interstellar medium" by Noé Brucy (Lyon) et al.
doi.org/10.33232/001...
doi.org/10.33232/001...
In the interest of transparency, our costs will increase next year as follows:
Peer Review System annual cost will be $500/year (was $425/year) plus $10 per submission (no change)
OA Publishing Platform annual cost will be $1,549/year (was $1,499/year)
So $2049 fixed plus $10 per submission.
Peer Review System annual cost will be $500/year (was $425/year) plus $10 per submission (no change)
OA Publishing Platform annual cost will be $1,549/year (was $1,499/year)
So $2049 fixed plus $10 per submission.
December 18, 2025 at 2:58 PM
In the interest of transparency, our costs will increase next year as follows:
Peer Review System annual cost will be $500/year (was $425/year) plus $10 per submission (no change)
OA Publishing Platform annual cost will be $1,549/year (was $1,499/year)
So $2049 fixed plus $10 per submission.
Peer Review System annual cost will be $500/year (was $425/year) plus $10 per submission (no change)
OA Publishing Platform annual cost will be $1,549/year (was $1,499/year)
So $2049 fixed plus $10 per submission.
Reposted by The Open Journal of Astrophysics
My first-author paper on the Ambiguous Nuclear Transient (ANT) AT2020adpi recently got published😄
Read it here 👇🏻
ANTs are a new class of transient events that do not fit into the broad categories of standard AGN variability or TDEs!
Read it here 👇🏻
ANTs are a new class of transient events that do not fit into the broad categories of standard AGN variability or TDEs!
New Publication at the Open Journal of Astrophysics: "Unraveling the Nature of the Nuclear Transient AT2020adpi" by Paarmita Pandey (Ohio State University, USA) and 15 others based in the USA, UK and Australia
doi.org/10.33232/001...
doi.org/10.33232/001...
Unraveling the Nature of the Nuclear Transient AT2020adpi | Published in The Open Journal of Astrophysics
By Paarmita Pandey, Jason Hinkle & 14 more. Investigation into a particular transient event AT2020adpi and a discussion of whether it is an extreme example of AGN variability or a Tidal Disruption Eve...
doi.org
December 17, 2025 at 5:48 AM
My first-author paper on the Ambiguous Nuclear Transient (ANT) AT2020adpi recently got published😄
Read it here 👇🏻
ANTs are a new class of transient events that do not fit into the broad categories of standard AGN variability or TDEs!
Read it here 👇🏻
ANTs are a new class of transient events that do not fit into the broad categories of standard AGN variability or TDEs!
Advance Notice: we will remain open for submissions over the forthcoming holiday period, but will not be publishing any papers from Christmas Eve until the new year.
If you want your paper to be published in 2025, therefore, the final version must be announced on arXiv by Wednesday 24th December.
If you want your paper to be published in 2025, therefore, the final version must be announced on arXiv by Wednesday 24th December.
December 16, 2025 at 8:50 AM
Advance Notice: we will remain open for submissions over the forthcoming holiday period, but will not be publishing any papers from Christmas Eve until the new year.
If you want your paper to be published in 2025, therefore, the final version must be announced on arXiv by Wednesday 24th December.
If you want your paper to be published in 2025, therefore, the final version must be announced on arXiv by Wednesday 24th December.
New Publication at the Open Journal of Astrophysics: "Optimal intrinsic alignment estimators in the presence of redshift-space distortions" by Claire Lamman (Harvard-Smithsonian CfA), Jonathan Blazek (Ohio State U.) and Daniel J. Eisenstein (Northeastern U.)
doi.org/10.33232/001...
doi.org/10.33232/001...
Optimal intrinsic alignment estimators in the presence of redshift-space distortions | Published in The Open Journal of Astrophysics
By Claire Lamman, Jonathan Blazek & 1 more. Estimators for quantifying intrinsic alignments in large spectroscopic surveys intended to inprove the constraints they provide for weak lensing and other c...
doi.org
December 15, 2025 at 8:58 AM
New Publication at the Open Journal of Astrophysics: "Optimal intrinsic alignment estimators in the presence of redshift-space distortions" by Claire Lamman (Harvard-Smithsonian CfA), Jonathan Blazek (Ohio State U.) and Daniel J. Eisenstein (Northeastern U.)
doi.org/10.33232/001...
doi.org/10.33232/001...
New Publication at the Open Journal of Astrophysics: "Tidally Delayed Spin-Down of Very Low Mass Stars" by Ketevan Kotorashvili and Eric G. Blackman (U. Rochester, USA)
doi.org/10.33232/001...
doi.org/10.33232/001...
December 12, 2025 at 10:34 AM
New Publication at the Open Journal of Astrophysics: "Tidally Delayed Spin-Down of Very Low Mass Stars" by Ketevan Kotorashvili and Eric G. Blackman (U. Rochester, USA)
doi.org/10.33232/001...
doi.org/10.33232/001...
New Publication at the Open Journal of Astrophysics: "Transient QPOs of Fermi-LAT blazars with Linearly Multiplicative Oscillations" by P. Penil (Clemson University, USA) and 7 others based in the USA, Italy and Germany
doi.org/10.33232/001...
doi.org/10.33232/001...
Transient QPOs of Fermi-LAT blazars with Linearly Multiplicative Oscillations | Published in The Open Journal of Astrophysics
By P. Penil, O. Otero-Santos & 6 more. An investigation of patterns of quasi-periodic oscillations in observed blazar systems characterized by periodic multiplicative amplitudes including both the per...
doi.org
December 10, 2025 at 12:23 PM
New Publication at the Open Journal of Astrophysics: "Transient QPOs of Fermi-LAT blazars with Linearly Multiplicative Oscillations" by P. Penil (Clemson University, USA) and 7 others based in the USA, Italy and Germany
doi.org/10.33232/001...
doi.org/10.33232/001...
New Publication at the Open Journal of Astrophysics: "The role of peculiar velocity uncertainties in standard siren cosmology" by Chris Blake and Ryan J. Turner (Swinburne, Australia)
doi.org/10.33232/001...
doi.org/10.33232/001...
The role of peculiar velocity uncertainties in standard siren cosmology | Published in The Open Journal of Astrophysics
By Chris Blake, Ryan J. Turner. A discussion of the impact of peculiar velocities on the error in H_0 determinations from local distance indicators with observed redshifts, incorporating the bulk flow...
doi.org
December 9, 2025 at 7:47 AM
New Publication at the Open Journal of Astrophysics: "The role of peculiar velocity uncertainties in standard siren cosmology" by Chris Blake and Ryan J. Turner (Swinburne, Australia)
doi.org/10.33232/001...
doi.org/10.33232/001...
New Publication at the Open Journal of Astrophysics: "Detecting False Positives With Derived Planetary Parameters: Experimenting with the KEPLER Dataset" by Ayan Bin Rafaih (Aitchison College, Lahore, Pakistan) and Zachary Murray (Université Côte d’Azur, France)
doi.org/10.33232/001...
doi.org/10.33232/001...
Detecting False Positives With Derived Planetary Parameters: Experimenting with the KEPLER Dataset | Published in The Open Journal of Astrophysics
By Ayan Bin Rafaih, Zachary Murray. Investigating the performance of a range of machine-learning algorithms on the KEPLER dataset, using precision-recall trade-off and accuracy metrics
doi.org
December 9, 2025 at 7:35 AM
New Publication at the Open Journal of Astrophysics: "Detecting False Positives With Derived Planetary Parameters: Experimenting with the KEPLER Dataset" by Ayan Bin Rafaih (Aitchison College, Lahore, Pakistan) and Zachary Murray (Université Côte d’Azur, France)
doi.org/10.33232/001...
doi.org/10.33232/001...
New Publication: "Cosmic Rays Masquerading as Cool Cores: An Inverse-Compton Origin for Cool Core Cluster Emission" by
Philip F. Hopkins (Caltech), Eliot Quataert (Princeton), Emily M. Silich, Jack Sayers, Sam B. Ponnada & Isabel S. Sands (Caltech)
doi.org/10.33232/001...
Philip F. Hopkins (Caltech), Eliot Quataert (Princeton), Emily M. Silich, Jack Sayers, Sam B. Ponnada & Isabel S. Sands (Caltech)
doi.org/10.33232/001...
Cosmic Rays Masquerading as Cool Cores: An Inverse-Compton Origin for Cool Core Cluster Emission | Published in The Open Journal of Astrophysics
By Philip F. Hopkins, Eliot Quataert & 4 more. An argument that cosmic-ray inverse-compton emission could contribute significantly to the X-ray surface brightness (SB) in cool-corre clusters, implying...
doi.org
December 9, 2025 at 7:23 AM
New Publication: "Cosmic Rays Masquerading as Cool Cores: An Inverse-Compton Origin for Cool Core Cluster Emission" by
Philip F. Hopkins (Caltech), Eliot Quataert (Princeton), Emily M. Silich, Jack Sayers, Sam B. Ponnada & Isabel S. Sands (Caltech)
doi.org/10.33232/001...
Philip F. Hopkins (Caltech), Eliot Quataert (Princeton), Emily M. Silich, Jack Sayers, Sam B. Ponnada & Isabel S. Sands (Caltech)
doi.org/10.33232/001...
New Blog Post by our Editor-in-Chief
astro.theoj.org/post/3602-li...
astro.theoj.org/post/3602-li...
Like a Million Pounds | Published by The Open Journal of Astrophysics
Publishing by Diamond Open Access can save the research community millions of pounds, as the Open Journal of Astrophysics is proving.
astro.theoj.org
December 6, 2025 at 11:27 AM
New Blog Post by our Editor-in-Chief
astro.theoj.org/post/3602-li...
astro.theoj.org/post/3602-li...
New Publication at the Open Journal of Astrophysics: "Unraveling the Nature of the Nuclear Transient AT2020adpi" by Paarmita Pandey (Ohio State University, USA) and 15 others based in the USA, UK and Australia
doi.org/10.33232/001...
doi.org/10.33232/001...
Unraveling the Nature of the Nuclear Transient AT2020adpi | Published in The Open Journal of Astrophysics
By Paarmita Pandey, Jason Hinkle & 14 more. Investigation into a particular transient event AT2020adpi and a discussion of whether it is an extreme example of AGN variability or a Tidal Disruption Eve...
doi.org
December 4, 2025 at 8:53 AM
New Publication at the Open Journal of Astrophysics: "Unraveling the Nature of the Nuclear Transient AT2020adpi" by Paarmita Pandey (Ohio State University, USA) and 15 others based in the USA, UK and Australia
doi.org/10.33232/001...
doi.org/10.33232/001...
Reposted by The Open Journal of Astrophysics
As one of the most wide-reaching preprint repositories, @arxiv.bsky.social has been a natural launch point for many overlay publications.
At Scholastica, we're privileged to work with various arXiv overlay journals, like @ojastro.bsky.social and @quantum-journal.bsky.social.
At Scholastica, we're privileged to work with various arXiv overlay journals, like @ojastro.bsky.social and @quantum-journal.bsky.social.
December 3, 2025 at 4:03 PM
As one of the most wide-reaching preprint repositories, @arxiv.bsky.social has been a natural launch point for many overlay publications.
At Scholastica, we're privileged to work with various arXiv overlay journals, like @ojastro.bsky.social and @quantum-journal.bsky.social.
At Scholastica, we're privileged to work with various arXiv overlay journals, like @ojastro.bsky.social and @quantum-journal.bsky.social.
New Publication at the Open Journal of Astrophysics: "IAEmu: Learning Galaxy Intrinsic Alignment Correlations" by Sneh Pandya Yuanyuan Yang, Nicholas Van Alfen, Jonathan Blazek and Robin Walters (Northeastern University, Boston, USA)
doi.org/10.33232/001...
doi.org/10.33232/001...
IAEmu: Learning Galaxy Intrinsic Alignment Correlations | Published in The Open Journal of Astrophysics
By Sneh Pandya, Yuanyuan Yang & 3 more. A neural network-based emulator that predicts the galaxy position-position, position-orientation, and orientation-orientation, correlation functions and their u...
doi.org
December 2, 2025 at 7:52 AM
New Publication at the Open Journal of Astrophysics: "IAEmu: Learning Galaxy Intrinsic Alignment Correlations" by Sneh Pandya Yuanyuan Yang, Nicholas Van Alfen, Jonathan Blazek and Robin Walters (Northeastern University, Boston, USA)
doi.org/10.33232/001...
doi.org/10.33232/001...
New Publication at the Open Journal of Astrophysics: "Bayesian Posteriors with Stellar Population Synthesis on GPUs" by Georgios Zacharegkas & Andrew Hearin (Argonne National Laboratory, USA) and Andrew Benson (Carnegie Observatories, USA)
doi.org/10.33232/001...
doi.org/10.33232/001...
Bayesian Posteriors with Stellar Population Synthesis on GPUs | Published in The Open Journal of Astrophysics
By Georgios Zacharegkas, Andrew Hearin & 1 more. Exploration of a range of computational techniques aimed at accelerating Stellar Population Synthesis predictions of galaxy photometry using the JAX li...
doi.org
December 2, 2025 at 7:39 AM
New Publication at the Open Journal of Astrophysics: "Bayesian Posteriors with Stellar Population Synthesis on GPUs" by Georgios Zacharegkas & Andrew Hearin (Argonne National Laboratory, USA) and Andrew Benson (Carnegie Observatories, USA)
doi.org/10.33232/001...
doi.org/10.33232/001...
New Publication: "Sulphur abundances in star-forming regions from optical emission lines: A new approach based on photoionization models consistent with the direct method" by E. Pérez-Montero (Inst. Astrofísica Andalucía, Spain) and 7 others based in Spain and Germany
doi.org/10.33232/001...
doi.org/10.33232/001...
Sulphur abundances in star-forming regions from optical emission lines: A new approach based on photoionization models consistent with the direct method | Published in The Open Journal of Astrophysics
By Enrique Pérez-Montero, Borja Pérez-Díaz & 6 more. Using the emission lines produced in the optical part of the spectrum and with photoionization models to derive sulphur chemical abundances in the ...
doi.org
December 1, 2025 at 9:19 AM
New Publication: "Sulphur abundances in star-forming regions from optical emission lines: A new approach based on photoionization models consistent with the direct method" by E. Pérez-Montero (Inst. Astrofísica Andalucía, Spain) and 7 others based in Spain and Germany
doi.org/10.33232/001...
doi.org/10.33232/001...
New Publication at the Open Journal of Astrophysics: "A Less Terrifying Universe? Mundanity as an Explanation for the Fermi Paradox" by Robin H.D. Corbet (U. Maryland, USA)
doi.org/10.33232/001...
doi.org/10.33232/001...
A Less Terrifying Universe? Mundanity as an Explanation for the Fermi Paradox | Published in The Open Journal of Astrophysics
By Robin H.D. Corbet. A discussion of possible explanations for the lack of s evidence for the presence of technology-using extraterrestrial civilizations in the Galaxy (usually called the Fermi para...
doi.org
December 1, 2025 at 9:17 AM
New Publication at the Open Journal of Astrophysics: "A Less Terrifying Universe? Mundanity as an Explanation for the Fermi Paradox" by Robin H.D. Corbet (U. Maryland, USA)
doi.org/10.33232/001...
doi.org/10.33232/001...
New Publication at the Open Journal of Astrophysics: "The galaxy-IGM connection in THESAN: observability and information content of the galaxy-Lyman-alpha cross-correlation at z>6" by E. Garaldi (U. Tokyo, Japan) and 3 others based in Germany, USA, & Canada
doi.org/10.33232/001...
doi.org/10.33232/001...
The galaxy-IGM connection in THESAN: observability and information content of the galaxy-Lyman-$α$ cross-correlation at $z \geq 6$ | Published in The Open Journal of Astrophysics
By Enrico Garaldi, Verena Bellscheidt & 2 more. An investigation of the impact of observational limitations on the ability to retrieve the intrinsic galaxy-Lyman-alpha cross correlation from line-of-s...
doi.org
December 1, 2025 at 9:16 AM
New Publication at the Open Journal of Astrophysics: "The galaxy-IGM connection in THESAN: observability and information content of the galaxy-Lyman-alpha cross-correlation at z>6" by E. Garaldi (U. Tokyo, Japan) and 3 others based in Germany, USA, & Canada
doi.org/10.33232/001...
doi.org/10.33232/001...
New Publication at the Open Journal of Astrophysics: "Simulating realistic Lyman-alpha emitting galaxies including the effect of radiative transfer" by Hasti Khoraminezhad & Shun Saito (Missouri IST, USA), Max Gronke (U. Heidelberg, DE) and Chris Byrohl (MPA Garching, DE)
doi.org/10.33232/001...
doi.org/10.33232/001...
Simulating realistic Lyman-$α$ emitting galaxies including the effect of radiative transfer | Published in The Open Journal of Astrophysics
By Hasti Khoraminezhad, Shun Saito & 2 more. An empirical model for Lyman-alpha emitters (LAEs) which provides predictions for the halo occupation distributions and relationship between luminosity and...
doi.org
November 27, 2025 at 9:22 AM
New Publication at the Open Journal of Astrophysics: "Simulating realistic Lyman-alpha emitting galaxies including the effect of radiative transfer" by Hasti Khoraminezhad & Shun Saito (Missouri IST, USA), Max Gronke (U. Heidelberg, DE) and Chris Byrohl (MPA Garching, DE)
doi.org/10.33232/001...
doi.org/10.33232/001...