The Open Journal of Astrophysics @ojastro

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 Bošković Institute, Croatia)

doi.org/10.33232/001...

10.02.2026 06:42 — 👍 2 🔁 1 💬 0 📌 0

Faraday Depolarization Study of a Radio Galaxy Using LOFAR Two-metre Sky Survey: Data Release 2 | Published in The Open Journal of Astrophysics By Samantha Sneha Paul, Abhik Ghosh. The study analyzes the depolarization of radio galaxy ILTJ012215.21+254334.8 using LOFAR's Sky Survey data, revealing a preferred three-component model and highlig...

New Publication at the Open Journal of Astrophysics: "Faraday Depolarization Study of a Radio Galaxy Using LOFAR Two-metre Sky Survey: Data Release 2" by Samantha Sneha Paul and Abhik Ghosh (Banwarilal Bhalotia College, India)

doi.org/10.33232/001...

10.02.2026 06:26 — 👍 2 🔁 2 💬 0 📌 0

The Bispectrum of Intrinsic Alignments: II. Precision Comparison Against Dark Matter Simulations | Published in The Open Journal of Astrophysics By Thomas Bakx, Toshiki Kurita & 3 more. This study uses N-body simulations to accurately measure three-dimensional bispectra of halo intrinsic alignments and dark matter overdensities, providing a me...

New Publication at the Open Journal of Astrophysics: "The Bispectrum of Intrinsic Alignments: II. Precision Comparison Against Dark Matter Simulations" by T. Bakx (Utrecht), Toshiki Kurita (MPA Garching), A. Eggemeier (Bonn), Nora Elisa Chisari (Utrecht) and Z. Vlah (Zagreb)

doi.org/10.33232/001...

06.02.2026 07:48 — 👍 3 🔁 1 💬 0 📌 0

Unveiling the drivers of the Baryon Cycles with Interpretable Multi-step Machine Learning and Simulations | Published in The Open Journal of Astrophysics By Mst Shamima Khanom, Benjamin W. Keller & 1 more. The study uses machine learning methods to understand how galaxies lose or retain baryons, highlighting the relationship between baryon fraction and...

New Publication at the Open Journal of Astrophysics: "Unveiling the drivers of the Baryon Cycles with Interpretable Multi-step Machine Learning and Simulations" by Mst Shamima Khanom, Benjamin W. Keller and Javier Ignacio Saavedra Moreno (U. Memphis, USA)

doi.org/10.33232/001...

05.02.2026 07:41 — 👍 3 🔁 1 💬 0 📌 1

A Systematic Search for Big Dippers in ASAS-SN | Published in The Open Journal of Astrophysics By B. JoHantgen, D. M. Rowan & 7 more. The study identifies 4 new dipper stars and 15 long-period eclipsing binary candidates using ASAS-SN light curves and multi-wavelength data, categorizing them ba...

New Publication at the Open Journal of Astrophysics: "A Systematic Search for Big Dippers in ASAS-SN" by B. JoHantgen (Ohio State University, USA) and 8 others based in the USA, China and Chile.

doi.org/10.33232/001...

04.02.2026 08:40 — 👍 1 🔁 1 💬 0 📌 0

Inferring Interstellar Medium Density, Temperature, and Metallicity from Turbulent H II Regions | Published in The Open Journal of Astrophysics By Larrance Xing, Nicholas Choustikov & 2 more. Supersonic turbulenc eaffects the interpretation of H II region properties, potentially impacting inferred metallicity, ionization, and excitation from ...

New Publication at the Open Journal of Astrophysics: "Inferring Interstellar Medium Density, Temperature, and Metallicity from Turbulent H II Regions" by Larrance Xing (U. Chicago, USA), Nicholas Choustikov (Oxford), Harley Katz (Chicago) and Alex J. Cameron (DAWN, Denmark)

doi.org/10.33232/001...

04.02.2026 08:21 — 👍 1 🔁 1 💬 0 📌 0

Photometric Redshifts in JWST Deep Fields: A Pixel-Based Alternative with DeepDISC | Published in The Open Journal of Astrophysics By Grant Merz, Ming-Yang Zhuang & 5 more. The study explores the effectiveness of the DeepDISC machine learning algorithm in estimating photometric redshifts from near-infrared data, demonstrating its...

New Publication at the Open Journal of Astrophysics: "Photometric Redshifts in JWST Deep Fields: A Pixel-Based Alternative with DeepDISC" by Grant Merz (U. Illinois at Urbana-Champaign) and 6 others, all based in the USA

doi.org/10.33232/001...

02.02.2026 11:23 — 👍 3 🔁 1 💬 0 📌 0

The Impact of Star Formation and Feedback Recipes on the Stellar Mass and Interstellar Medium of High-Redshift Galaxies | Published in The Open Journal of Astrophysics By Harley Katz, Martin P. Rey & 3 more. A discussion of MEGATRON, a new model for galaxy formation simulations, highlighting that feedback energy controls star formation at high redshift and highlight...

New Publication at the Open Journal of Astrophysics: "The Impact of Star Formation and Feedback Recipes on the Stellar Mass and Interstellar Medium of High-Redshift Galaxies" by Harley Katz (Chicago) and 4 others based in the UK, Sweden and Korea.

doi.org/10.33232/001...

02.02.2026 11:04 — 👍 3 🔁 1 💬 0 📌 0

A Cosmic Miracle: A Remarkably Luminous Galaxy at z<sub>spec</sub> = 14.44 Confirmed with JWST | Published in The Open Journal of Astrophysics By Rohan P. Naidu, Pascal A. Oesch & 44 more. The James Webb Space Telescope (JWST) has discovered a bright galaxy, MoM-z14, located 280 million years post-Big Bang, challenging previous models and su...

New Publication at the Open Journal of Astrophysics: "A Cosmic Miracle: A Remarkably Luminous Galaxy at $z_{\rm spec} = 14.44$ Confirmed with JWST" by Rohan Naidu (MIT Kavli Institute) and 45 others.

doi.org/10.33232/001...

30.01.2026 07:56 — 👍 1 🔁 0 💬 0 📌 0

The Atacama Cosmology Telescope: DR6 Sunyaev-Zel'dovich Selected Galaxy Clusters Catalog | Published in The Open Journal of Astrophysics By M. Aguena, S. Aiola & 99 more. This study reports on the discovery of 10,040 galaxy clusters in the Atacama Cosmology Telescope data, including 1,180 clusters at high redshifts, using the Sunyaev-Z...

New Publication at the Open Journal of Astrophysics: "The Atacama Cosmology Telescope: DR6 Sunyaev-Zel’dovich Selected Galaxy Clusters Catalog" by M. Aguena et al. (101 authors altogether), on behalf of the ACT-DES-HSC Collaboration

doi.org/10.33232/001...

27.01.2026 09:57 — 👍 2 🔁 2 💬 0 📌 0

DIPLODOCUS I: Framework for the evaluation of relativistic transport equations with continuous forcing and discrete particle interactions | Published in The Open Journal of Astrophysics By Christopher N Everett, Garret Cotter. DIPLODOCUS is a new framework for mesoscopic modelling of astrophysical systems, using an integral formulation of relativistic transport equations and a discre...

New Publication at the Open Journal of Astrophysics: "DIPLODOCUS I: Framework for the evaluation of relativistic transport equations with continuous forcing and discrete particle interactions" by Christopher N Everett & Garret Cotter (University of Oxford, UK)

doi.org/10.33232/001...

27.01.2026 08:50 — 👍 0 🔁 1 💬 0 📌 0

Probing Stellar Kinematics with the Time-Asymmetric Hanbury Brown and Twiss Effect | Published in The Open Journal of Astrophysics By Lucijana Stanic, Ivan Cardea & 12 more. This research demonstrates that intensity interferometry can reveal internal stellar kinematics, providing a new way to observe stellar dynamics with high ti...

New Publication at the Open Journal of Astrophysics: "Probing Stellar Kinematics with the Time-Asymmetric Hanbury Brown and Twiss Effect" by Lucijana Stanic (University of Zurich, Switzerland) and 13 others based in Zurich, Lausanne and Geneva.

doi.org/10.33232/001...

26.01.2026 11:47 — 👍 1 🔁 1 💬 0 📌 0

The Kinematic Properties of TŻO Candidate HV 11417 with Gaia DR3 | Published in The Open Journal of Astrophysics By Anna J. G. O'Grady. The study uses updated data to confirm that HV 11417, a potential Thorne-Żytkow Object, is probably part of the Small Magellanic Cloud and qualifies as a runaway star.

New Publication at the Open Journal of Astrophysics: "The Kinematic Properties of TŻO Candidate HV 11417 with Gaia DR3" by Anna J. G. O'Grady (Carnegie Mellon University, USA)

doi.org/10.33232/001...

21.01.2026 09:45 — 👍 0 🔁 1 💬 0 📌 0

Angular bispectrum of matter number counts in cosmic structures | Published in The Open Journal of Astrophysics By Thomas Montandon, Enea Di Dio & 2 more. The first full-sky computation of the angular bispectrum in second-order perturbation theory, offering insights into the Universe's initial conditions, gravi...

New Publicationn at the Open Journal of Astrophysics: "Angular bispectrum of matter number counts in cosmic structures" by Thomas Montandon (U. Montpellier, FR), Enea Di Dio (U. Genève, CH), Cornelius Rampf (Ruđer Bošković I., Croatia) and Julian Adamek (U. Zürich, CH)

doi.org/10.33232/001...

21.01.2026 09:31 — 👍 4 🔁 1 💬 0 📌 0

The Properties of Little Red Dot Galaxies in the ASTRID Simulation | Published in The Open Journal of Astrophysics By Patrick LaChance, Rupert A. C. Croft & 6 more. The study analyses mock observations of "Little Red Dot" galaxies created from the ASTRID simulation, having high stellar masses and containing massi...

New Publication at the Open Journal of Astrophysics; "The Properties of Little Red Dot Galaxies in the ASTRID Simulation" by Patrick LaChance and 7 others, all based in the USA

doi.org/10.33232/001...

19.01.2026 10:34 — 👍 1 🔁 1 💬 0 📌 0

Detectability of dark matter subhalo impacts in Milky Way stellar streams | Published in The Open Journal of Astrophysics By Junyang Lu, Tongyan Lin & 2 more. The study develops a method to estimate the minimum detectable dark matter subhalo mass in stellar streams, ranking them by sensitivity and identifying promising l...

New Publication at the Open Journal of Astrophysics: "Detectability of dark matter subhalo impacts in Milky Way stellar streams" by Junyang Lu , Tongyan Lin & Mukul Sholapurkar (UCSD, USA) and Ana Bonaca (Carnegie Observatories, USA)

doi.org/10.33232/001...

16.01.2026 09:33 — 👍 0 🔁 0 💬 0 📌 0

Universal numerical convergence criteria for subhalo tidal evolution | Published in The Open Journal of Astrophysics By Barry T. Chiang, Frank C. van den Bosch & 1 more. Analysis of simulation suite that addresses the 'overmerging' problem in cosmological simulations of dark matter subhalos, showing that up to 50% o...

New Publication at the Open Journal of Astrophysics: "Universal numerical convergence criteria for subhalo tidal evolution" by Barry T. Chiang & Frank C. van den Bosch (Yale U., USA) and Hsi-Yu Schive (National Taiwan University, Taiwan)

doi.org/10.33232/001...

15.01.2026 09:13 — 👍 1 🔁 1 💬 0 📌 0

Constraints from CMB lensing tomography with projected bispectra | Published in The Open Journal of Astrophysics By Lea Harscouet, David Alonso & 2 more. The study presents angular power spectra and bispectra of DESI luminous red galaxies, finding that the galaxy bispectrum can constrain the amplitude of matter ...

New Publication at the Open Journal of Astrophysics: "Constraints from CMB lensing tomography with projected bispectra" by Lea Harscouet & David Alonso (U. Oxford, UK), Andrina Nicola (U. Manchester, UK) and Anže Slosar (Brookhaven National Laboratory, USA)

doi.org/10.33232/001...

14.01.2026 14:02 — 👍 2 🔁 2 💬 0 📌 0

Accelerated calibration of semi-analytic galaxy formation models | Published in The Open Journal of Astrophysics By Andrew Robertson, Andrew Benson. A faster calibration framework for galaxy formation models, using fewer simulations for each evaluation. However, the model shows discrepancies suggesting the model...

New Publication at the Open Journal of Astrophysics: "Accelerated calibration of semi-analytic galaxy formation models" by Andrew Robertson and Andrew Benson (Carnegie Observatories, USA)

doi.org/10.33232/001...

13.01.2026 09:42 — 👍 1 🔁 1 💬 0 📌 0

On the origins of oxygen: ALMA and JWST characterise the multi-phase, metal-enriched, star-bursting medium within a 'normal' $z > 11$ galaxy | Published in The Open Journal of Astrophysics By Joris Witstok, Renske Smit & 30 more. New ALMA observations of the JADES-GS-z11-0 galaxy confirm the presence of the [O III] 88 µm line, suggesting it consists of two low-mass components undergoing...

New Publication at the Open Journal of Astrophysics: "On the origins of oxygen: ALMA and JWST characterise the multi-phase, metal-enriched, star-bursting medium within a ‘normal’ z>11 galaxy" by Joris Witstok (U. Copenhagen, Denmark) and 37 others dotted around the world

doi.org/10.33232/001...

12.01.2026 10:30 — 👍 4 🔁 2 💬 1 📌 0

DESI Data Release 1: Stellar Catalogue | Published in The Open Journal of Astrophysics By Sergey Koposov, Ting S. Li & 66 more. This paper introduces and describes the stellar Value-Added Catalogue (VAC) based on DESI Data Release 1, providing measurements for over 4 million stars, incl...

New Publication at the Open Journal of Astrophysics: "DESI Data Release 1: Stellar Catalogue" by Sergey Koposov (U. Edinburgh, UK) and an international cast of 67 other authors.

doi.org/10.33232/001...

12.01.2026 10:11 — 👍 2 🔁 2 💬 0 📌 0

Rotational Kinematics in the Globular Cluster System of M31: Insights from Bayesian Inference | Published in The Open Journal of Astrophysics By Yuan (Cher) Li, Brendon J. Brewer & 2 more. This study uses Bayesian modelling to explore the kinematics of globular clusters in the Andromeda Galaxy, revealing distinct rotation patterns that sugg...

New Publication at the Open Journal of Astrophysics: "Rotational Kinematics in the Globular Cluster System of M31: Insights from Bayesian Inference" by Yuan (Cher) Li & Brendon J. Brewer (U. Auckland, New Zealand), Geraint F. Lewis (U. Sydney, Australia) and Dougal Mackey

doi.org/10.33232/001...

12.01.2026 09:55 — 👍 4 🔁 3 💬 0 📌 0

On the origins of oxygen: ALMA and JWST characterise the multi-phase, metal-enriched, star-bursting medium within a 'normal' $z > 11$ galaxy | Published in The Open Journal of Astrophysics By Joris Witstok, Renske Smit & 30 more. New ALMA observations of the JADES-GS-z11-0 galaxy confirm the presence of the [O III] 88 µm line, suggesting it consists of two low-mass components undergoing...

New Publication at the Open Journal of Astrophysics: "On the origins of oxygen: ALMA and JWST characterise the multi-phase, metal-enriched, star-bursting medium within a ‘normal’ z>11 galaxy" by Joris Witstok (U. Copenhagen, Denmark) and 37 others dotted around the world

doi.org/10.33232/001...

12.01.2026 10:30 — 👍 4 🔁 2 💬 1 📌 0

DESI Data Release 1: Stellar Catalogue | Published in The Open Journal of Astrophysics By Sergey Koposov, Ting S. Li & 66 more. This paper introduces and describes the stellar Value-Added Catalogue (VAC) based on DESI Data Release 1, providing measurements for over 4 million stars, incl...

New Publication at the Open Journal of Astrophysics: "DESI Data Release 1: Stellar Catalogue" by Sergey Koposov (U. Edinburgh, UK) and an international cast of 67 other authors.

doi.org/10.33232/001...

12.01.2026 10:11 — 👍 2 🔁 2 💬 0 📌 0

Rotational Kinematics in the Globular Cluster System of M31: Insights from Bayesian Inference | Published in The Open Journal of Astrophysics By Yuan (Cher) Li, Brendon J. Brewer & 2 more. This study uses Bayesian modelling to explore the kinematics of globular clusters in the Andromeda Galaxy, revealing distinct rotation patterns that sugg...

New Publication at the Open Journal of Astrophysics: "Rotational Kinematics in the Globular Cluster System of M31: Insights from Bayesian Inference" by Yuan (Cher) Li & Brendon J. Brewer (U. Auckland, New Zealand), Geraint F. Lewis (U. Sydney, Australia) and Dougal Mackey

doi.org/10.33232/001...

12.01.2026 09:55 — 👍 4 🔁 3 💬 0 📌 0

Distance measurements from the internal dynamics of globular clusters: Application to the Sombrero galaxy (M 104) | Published in The Open Journal of Astrophysics By Katja Fahrion, Michael A. Beasley & 8 more. This study uses the globular cluster velocity dispersion method to measure the distance to the Sombrero galaxy, finding it to be approximately 9.00 Mpc a...

New Publication at the Open Journal of Astrophysics: "Distance measurements from the internal dynamics of globular clusters: Application to the Sombrero galaxy (M 104)" by Katja Fahrion (University of Vienna, Austria) and 9 others based in Europe, USA, Australia & Brazil

doi.org/10.33232/001...

09.01.2026 09:35 — 👍 2 🔁 1 💬 0 📌 0

Constraining the Stellar-to-Halo Mass Relation with Galaxy Clustering and Weak Lensing from DES Year 3 Data | Published in The Open Journal of Astrophysics By G. Zacharegkas, C. Chang & 101 more. A framework to analyze the relationship between a galaxy's stellar mass and its dark matter halo mass, using data from the Dark Energy Survey. The findings alig...

New Publication at the Open Journal of Astrophysics: "Constraining the Stellar-to-Halo Mass Relation with Galaxy Clustering and Weak Lensing from DES Year 3 Data" by G. Zacharegkas et al. (Argonne National Laboratory, USA) and 102 others based in numerous countries.

doi.org/10.33232/001...

08.01.2026 10:23 — 👍 2 🔁 1 💬 0 📌 0

Going beyond $S_8$: fast inference of the matter power spectrum from weak-lensing surveys | Published in The Open Journal of Astrophysics By Cyrille Doux, Tanvi Karwal. A new framework to extract the scale-dependent matter power spectrum from cosmic shear and CMB lensing measurements, revealing a consistent suppression in the matter pow...

New Publication at the Open Journal of Astrophysics: "Going beyond $S_{8}$: fast inference of the matter power spectrum from weak-lensing surveys" by Cyrille Doux (Université Grenoble Alpes, France) and Tanvi Karwal (U. Chicago, USA)

doi.org/10.33232/001...

07.01.2026 09:31 — 👍 0 🔁 2 💬 0 📌 0

A targeted, parallax-based search for Planet Nine | Published in The Open Journal of Astrophysics By Hector Socas-Navarro, Ignacio Trujillo. A targeted search for the hypothesized Planet Nine in the outer solar system, using parallax position shifts. No credible candidates were found within the ob...

New Publication at the Open Journal of Astrophysics: "A targeted, parallax-based search for Planet Nine" by Hector Socas-Navarro and Ignacio Trujillo (Instituto de Astrofísica de Canaria, Spain)

doi.org/10.33232/001...

06.01.2026 07:54 — 👍 1 🔁 0 💬 0 📌 1

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!

24.12.2025 09:32 — 👍 7 🔁 1 💬 0 📌 0

The Open Journal of Astrophysics

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