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/
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)
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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...
doi.org
February 12, 2026 at 7:32 AM
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...
doi.org/10.33232/001...
Reposted by The Open Journal of Astrophysics
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!
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
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doi.org/10.33232/001...
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...
doi.org
February 11, 2026 at 11:30 AM
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!
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 Tecnológica de Bolívar, Colombia)
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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...
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February 11, 2026 at 5:21 PM
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 Tecnológica de Bolívar, Colombia)
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doi.org/10.33232/001...
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...
doi.org/10.33232/001...
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...
doi.org
February 11, 2026 at 8:22 AM
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...
doi.org/10.33232/001...
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)
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doi.org/10.33232/001...
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...
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February 10, 2026 at 6:42 AM
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)
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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)
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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...
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February 10, 2026 at 6:26 AM
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)
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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)
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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...
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February 6, 2026 at 7:48 AM
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)
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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)
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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...
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February 5, 2026 at 7:41 AM
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)
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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.
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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...
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February 4, 2026 at 8:41 AM
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.
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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)
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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 ...
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February 4, 2026 at 8:21 AM
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)
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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
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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...
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February 2, 2026 at 11:23 AM
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
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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.
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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...
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February 2, 2026 at 11:04 AM
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.
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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.
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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...
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January 30, 2026 at 7:56 AM
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.
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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
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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...
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January 27, 2026 at 9:57 AM
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
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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)
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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...
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January 27, 2026 at 8:50 AM
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)
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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.
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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...
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January 26, 2026 at 11:47 AM
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.
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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)
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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.
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January 21, 2026 at 9:45 AM
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)
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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)
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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...
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January 21, 2026 at 9:31 AM
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)
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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
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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...
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January 19, 2026 at 10:34 AM
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
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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)
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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...
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January 16, 2026 at 9:33 AM
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)
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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)
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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...
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January 15, 2026 at 9:13 AM
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)
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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)
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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 ...
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January 14, 2026 at 2:02 PM
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)
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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)
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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...
doi.org
January 13, 2026 at 9:42 AM
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)
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Reposted by The Open Journal of Astrophysics
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
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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...
doi.org
January 12, 2026 at 10:30 AM
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...
doi.org/10.33232/001...
Reposted by The Open Journal of Astrophysics
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.
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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...
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January 12, 2026 at 10:11 AM
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.
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