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!

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...

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...

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...

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...

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

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...

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.

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!

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.

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...

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...

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...

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...

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...

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...

New Blog Post by our Editor-in-Chief 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...

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.

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...

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...

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...

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...

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...

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...

New Publication at the Open Journal of Astrophysics: "Metallicity fluctuation statistics in the interstellar medium and young stars – II. Elemental cross-correlations and the structure of chemical abundance space" by Mark R. Krumholz (ANU) & 5 others, based in UK, US and AUS doi.org/10.33232/001...

New Publication at the Open Journal of Astrophysics: "A Targeted Gamma-Ray Search of Five Prominent Galaxy Merger Systems with 17 years of Fermi-LAT Data" by Siddhant Manna and Shantanu Desai (IIT Hyderabad Kandi, India) doi.org/10.33232/001...

New Publication at the Open Journal of Astrophysics: "A theoretical prediction for the dipole in nearby distances using cosmography" by Hayley J Macpherson (U. Chicago, USA) and Asta Heinesen (Niels Bohr Institute, Denmark) doi.org/10.33232/001...

New Publication at the Open Journal of Astrophysics: "Cool Gas in the Circumgalactic Medium of Massive Post Starburst Galaxies" by Zoe Harvey, Sahyadri Krishna, Vivienne Wild & Rita Tojeiro (U. St Andrews, UK) and Paul Hewett (U. Cambridge, UK) doi.org/10.33232/001...

New Publication at the Open Journal of Astrophysics: "A Bimodal Metallicity Distribution Function in the Ultra-Faint Dwarf Galaxy Reticulum II" by Alice M. Luna (U. Chicago, USA) and 8 others based in the USA, Korea and Canada. doi.org/10.33232/001...

New Publication at the Open Journal of Astrophysics: "The role of turbulence in setting the phase of the ISM and implications for the star formation rate" by Tine Colman (Université Paris-Saclay, France) and 13 others based in France, Germany, Italy and the UK. doi.org/10.33232/001...

New Publication at the Open Journal of Astrophysics: "Probing Anisotropic Cosmic Birefringence with Foreground-Marginalised SPT B-mode Likelihoods" by Lennart Balkenhol (Sorbonne U., FR), A. Coerver (UC Berkele), C. L. Reichardt (U. Melbourne) & J. A. Zebrowski (U. Chicago) doi.org/10.33232/001...

New Publication at the Open Journal of Astrophysics: "Beyond No No Tension: JWST z > 10 Galaxies Push Simulations to the Limit" by Joe McCaffrey (NUI Maynooth, Ireland), Samantha Hardin and John Wise (Georgia Institute of Technology, USA) and John Regan (Maynooth) doi.org/10.33232/001...

New Publication at the Open Journal of Astrophysics: "Witnessing downsizing in the making: quiescent and breathing galaxies at the dawn of the Universe" by Emiliano Merlin (Osservatorio Astronomico di Roma, Italy) and 20 others based in Europe, USA and China doi.org/10.33232/001...

New Publication at the Open Journal of Astrophysics: "Attributing the point symmetric structure of core-collapse supernova remnant N132D to the jittering jets explosion mechanism" by Noam Soker (Technion, Haifa, Israel) doi.org/10.33232/001...

New Publication at the Open Journal of Astrophysics: "Redshift Drift in Relativistic N-Body Simulations" by Alexander Oestreicher (U. Southern Denmark, DK), Chris Clarkson (QMUL, UK), Julian Adamek (U. Zürich, CH) and Sofie Marie Koksbang (U. Southern Denmark, DK) doi.org/10.33232/001...

New Publication at the Open Journal of Astrophysics: "Neutrino Constraints on Black Hole Formation in M31" by Yudai Sawa (U. Tokyo, Japan) and 11 others all based in Japan doi.org/10.33232/001...

New Publication at the Open Journal of Astrophysics: "Dynamical friction and measurements of the splashback radius in galaxy clusters" by Talia M. O'Shea (U. Wisconsin-Madison, USA), Josh Borrow (U. Pennsylvania, USA), and Stephanie O'Neil & Mark Vogelsberger (MIT) doi.org/10.33232/001...

New Publication at the Open Journal of Astrophysics: "Measuring the splashback feature: Dependence on halo properties and history" by Qiaorong S. Yu (Oxford U., UK) and 9 others based in the UK and USA. doi.org/10.33232/001...

New Publication at the Open Journal of Astrophysics: "The Unhurried Universe: A Continued Search for Long Term Variability in ASAS-SN" by Sydney Petz (Ohio State University, USA) and 7 others based in the USA, Chile and China. doi.org/10.33232/001...

This is our 400th publication!

New Publication at the Open Journal of Astrophysics: "The Potential Impact of Primordial Black Holes on Exoplanet Systems" by Garett Brown (U. Toronto at Scarborough), Linda He (Harvard U., USA), James Unwin (U. Illinois Chicago, USA) doi.org/10.33232/001...

New Publication at the Open Journal of Astrophysics: "A substellar flyby that shaped the orbits of the giant planets" by Garett Brown (U. Toronto at Scarborough, Canada), Renu Malhotra (U. Arizona, USA) and Hanno Rein (U. Toronto at Scarborough, Canada) doi.org/10.33232/001...

New Publication at the Open Journal of Astrophysics: "Maximizing Ariel’s Survey Leverage for Population-Level Studies of Exoplanets" by Nicolas B. Cowan and Ben Coull-Neveu (McGill University, Canada) doi.org/10.33232/001...

New Publication at the Open Journal of Astrophysics: "Fast X-ray Transient Detection with AXIS: application to Magnetar Giant Flares" by Michela Negro (Louisiana State University, USA) and 8 others based in the USA and Canada doi.org/10.33232/001...

New Publication at the Open Journal of Astrophysics: "Instability and vertical eccentricity variation in global hydrodynamic disk simulations" by Janosz W Dewberry (U Mass. Amherst, USA), Henrik N Latter & Gordon I Ogilvie (U Cambridge, UK) & Sebastien Fromang (Saclay, FR) doi.org/10.33232/001...

That Welsh by-election is the first election Putin has lost in over 20 years.

Next in our series on cooperative OA journal publishing models for #OAWeek, we're highlighting the overlay model. Learn more in this past interview with @telescoper.bsky.social, EIC of @ojastro.bsky.social, and Christian Gogolin, founding editor of @quantum-journal.bsky.social: buff.ly/xD2fSen

New Publication at the Open Journal of Astrophysics: "Clustering of DESI galaxies split by thermal Sunyaev-Zeldovich effect" by Michael Rashkovetskyi (Cfa Harvard-Smithsonian, USA) et al. (49 authors) doi.org/10.33232/001...

New Publication at the Open Journal of Astrophysics: "The DECADE cosmic shear project IV: cosmological constraints from 107 million galaxies across 5,400 deg^2 of the sky" by Dhayaa Anbajagane (University of Chicago, USA) et al. (75 authors) doi.org/10.33232/001...