🔭 Category

astro-ph

1088 papers

LeMMINGs VII: 5 GHz, 50 mas e-MERLIN observations of a statistically complete sample of nearby AGN

This paper presents high-resolution 5 GHz e-MERLIN observations of a statistically complete sample of nearby galaxies, revealing that compact radio cores and jets are the primary manifestation of black hole activity in the local Universe, with up to 30% of galaxies hosting such radio-active nuclei.

D. R. A. Williams-Baldwin (Jodrell Bank Centre for Astrophysics, School of Physics and Astronomy, The University of Manchester, Manchester, M13 9PL, UK), R. D. Baldi (INAF - Istituto di Radioastronomia, Via P. Gobetti 101, I-40129 Bologna, Italy), R. J. Beswick (Jodrell Bank Centre for Astrophysics, School of Physics and Astronomy, The University of Manchester, Manchester, M13 9PL, UK), I. M. McHardy (School of Physics and Astronomy, University of Southampton, Southampton, SO17 1BJ, UK), E. Carver (School of Physics and Astronomy, University of Southampton, Southampton, SO17 1BJ, UK), J. Clifford (School of Physics and Astronomy, University of Southampton, Southampton, SO17 1BJ, UK), B. T. Dullo (Department of Physical Sciences, Embry-Riddle Aeronautical University, Daytona Beach, FL 32114, USA), N. Kill (School of Physics and Astronomy, University of Southampton, Southampton, SO17 1BJ, UK), B. Krishnamoorthi (School of Physics and Astronomy, University of Southampton, Southampton, SO17 1BJ, UK), I. M. Mutie (Department of Astronomy and Space Science, Technical University of Kenya, P.O Box 52428 - 00200, Nairobi, Kenya, Jodrell Bank Centre for Astrophysics, School of Physics and Astronomy, The University of Manchester, Manchester, M13 9PL, UK), O. Woodcock (Jodrell Bank Centre for Astrophysics, School of Physics and Astronomy, The University of Manchester, Manchester, M13 9PL, UK), M. K. Argo (Jeremiah Horrocks Institute, School of Engineering and Computing, University of Lancashire, Preston PR1 2HE, UK), P. Boorman (Cahill Center for Astrophysics, California Institute of Technology, 1216 East California Boulevard, Pasadena, CA 91125, USA), E. Brinks (Centre for Astrophysics Research, University of Hertfordshire, College Lane, Hatfield, AL10 9AB, UK), D. M. Fenech (SKAO, Jodrell Bank, Lower Withington, Macclesfield, SK11 9FT, UK), J. H. Knapen (Instituto de Astrofísica de Canarias, Vía Láctea S/N, E-38205 La Laguna, Spain, Departamento de Astrofísica, Universidad de La Laguna, E-38206 La Laguna, Spain), S. Mathur (Astronomy Department, The Ohio State University, Columbus, OH, 43210, USA, Center for Astronomy and Astro-particle Physics, The Ohio State University, Columbus, OH 43210, USA, Eureka Scientific, 2452 DELMER ST STE 100, Oakland, CA, 94602, USA), J. Moldon (Instituto de Astrofísica de Andalucía), T. W. B. Muxlow (Jodrell Bank Centre for Astrophysics, School of Physics and Astronomy, The University of Manchester, Manchester, M13 9PL, UK), M. Pahari (Department of Physics, Indian Institute of Technology, Hyderabad 502285, India), N. H. Wrigley (Jodrell Bank Centre for Astrophysics, School of Physics and Astronomy, The University of Manchester, Manchester, M13 9PL, UK), A. Alberdi (Instituto de Astrofísica de Andalucía), W. Baan (Xinjiang Astronomical Observatory, Chinese Academy of Sciences, Urumqi 830011, China, Netherlands Institute for Radio Astronomy), A. Beri (Indian Institute of Science Education and Research, School of Physics and Astronomy, University of Southampton, Southampton, SO17 1BJ, UK, Indian Institute of Astrophysics, Koramangala II Block, Bangalore 560034, India), X. Cheng (Korea Astronomy and Space Science Institute, 776 Daedeok-daero, Yuseong-gu, Daejeon 34055, Korea), D. A. Green (Astrophysics Group, Cavendish Laboratory, J. J. Thomson Avenue, Cambridge CB3 0HE, UK), J. Healy (United Kingdom SKA Regional Centre, Jodrell Bank Centre for Astrophysics, School of Physics and Astronomy, The University of Manchester, Manchester, M13 9PL, UK), P. Kharb (National Centre for Radio Astrophysics), E. Körding (Department of Astrophysics/IMAPP, Radboud University, P.O. Box 9010, 6500GL Nijmegen, The Netherlands), G. Lucatelli (Jodrell Bank Centre for Astrophysics, School of Physics and Astronomy, The University of Manchester, Manchester, M13 9PL, UK), F. Panessa (INAF - Istituto di Astrofisica e Planetologia Spaziali, via Fosso del Cavaliere 100, I-00133 Roma, Italy), M. Puig-Subirà (Instituto de Astrofísica de Andalucía), C. Romero-Cañizales (Institute of Astronomy and Astrophysics, Academia Sinica, 11F of AS/NTU Astronomy-Mathematics Building, No.1, Sec. 4, Roosevelt Rd, Taipei 106319, Taiwan), D. J. Saikia (Fakultät für Physik, Universität Bielefeld, Postfach 100131, D-33501 Bielefeld, Germany, Assam Don Bosco University, Guwahati 781017, Assam, India), P. Saikia (Center for Astro, Particle and Planetary Physics, Department of Astronomy, Yale University, PO Box 208101, New Haven, CT 06520-8101, USA), F. Shankar (School of Physics and Astronomy, University of Southampton, Southampton, SO17 1BJ, UK), S. Sharma (Department of Physics, Indian Institute of Technology, Hyderabad 502285, India), I. R. Stevens (School of Physics and Astronomy, University of Birmingham, Edgbaston, Birmingham B15 2TT, UK), E. Varenius (Jodrell Bank Centre for Astrophysics, School of Physics and Astronomy, The University of Manchester, Manchester, M13 9PL, UK)2026-03-10🔭 astro-ph

A GPU-Accelerated Transient Detection Pipeline for DECam Time-Domain Surveys

This paper presents a GPU-accelerated transient detection pipeline for DECam time-domain surveys that integrates image differencing and CNN-based classification to achieve real-time processing, high completeness in identifying real transients, and efficient artifact rejection for rapid scientific discovery.

Lei Hu, Tomás Cabrera, Antonella Palmese, Lifan Wang, Igor Andreoni, Xander J. Hall, Xingzhuo Chen, Jiawen Yang, Frank Valdes, Brendan O'Connor, Yuhan Chen2026-03-10🔭 astro-ph

The 2024 BBN baryon abundance update

This paper updates the 2024 Big Bang Nucleosynthesis baryon abundance by using the PRyMordial\mathtt{PRyMordial} code to marginalize over nuclear reaction rates, revealing that theoretical versus experimental Deuterium burning rates drive significant differences in derived abundances and yielding conservative estimates of Ωbh2≈0.022\Omega_b h^2 \approx 0.022 with constraints on ultra-relativistic relics.

Nils Schöneberg2026-03-09🔭 astro-ph

Dust Evolution in Simulated Multiphase Galactic Outflows

This study utilizes high-resolution simulations to demonstrate that while environmental shielding in cool clouds protects dust grains during galactic outflows, grain size critically determines survival and transport efficiency, with large grains surviving across all phases and small grains being rapidly sputtered in hot gas, ultimately resulting in the hot phase dominating the delivery of surviving dust to the circumgalactic medium.

Helena M. Richie, Evan E. Schneider2026-03-09🔭 astro-ph

DESI DR2 reference mocks: clustering results from Uchuu-BGS and LRG

This paper presents high-fidelity mock galaxy catalogs for DESI's Bright Galaxy Survey (BGS) and Luminous Red Galaxy (LRG) samples, generated via subhalo abundance matching on the Uchuu simulation, which successfully reproduce observed redshift evolution, clustering statistics, and galaxy-halo connections with high accuracy.

E. Fernández-García, F. Prada, A. Smith, J. DeRose, A. J. Ross, S. Bailey, M. S. Wang, Z. Ding, C. Guandalin, C. Lamman, R. Vaisakh, R. Kehoe, J. Lasker, T. Ishiyama, S. M. Moore, S. Cole, M. Siudek, A. Amalbert, A. Salcedo, A. Hearin, B. Joachimi, A. Rocher, S. Saito, A. Krolewski, Z. Slepian, Q. Li, K. S. Dawson, E. Jullo, J. Aguilar, S. Ahlen, D. Bianchi, D. Brooks, T. Claybaugh, A. de la Macorra, P. Doel, S. Ferraro, A. Font-Ribera, J. E. Forero-Romero, S. Gontcho A Gontcho, G. Gutierrez, K. Honscheid, M. Ishak, R. Joyce, S. Juneau, D. Kirkby, T. Kisner, A. Kremin, O. Lahav, A. Lambert, M. Landriau, M. E. Levi, M. Manera, R. Miquel, J. Moustakas, S. Nadathur, W. J. Percival, I. Pérez-Ràfols, G. Rossi, E. Sanchez, D. Schlegel, H. Seo, J. Silber, D. Sprayberry, G. Tarlé, B. A. Weaver, P. Zarrouk, R. Zhou2026-03-09🔭 astro-ph

PyBird-JAX: Accelerated inference in large-scale structure with model-independent emulation of one-loop galaxy power spectra

The paper introduces PyBird-JAX\texttt{PyBird-JAX}, a differentiable, JAX-based framework that utilizes neural network emulators to accelerate one-loop EFTofLSS galaxy power spectrum calculations by 3–4 orders of magnitude while maintaining high accuracy, thereby enabling rapid and efficient cosmological inference for upcoming large-scale structure surveys.

Alexander Reeves, Pierre Zhang, Henry Zheng2026-03-09🔭 astro-ph

Radiation GRMHD Models of Accretion onto Stellar-Mass Black Holes: II. Super-Eddington Accretion

This paper presents comprehensive GRMHD simulations with angle-discretized radiation transport showing that super-Eddington accretion onto stellar-mass black holes consistently forms radiation-pressure-supported thick disks with low efficiency due to outflows, where the presence of strong jets driven by high spin and magnetic flux can clear the funnel to enable beamed radiation escape, while weak jets result in obscured flows with distinct observational signatures applicable to ultraluminous X-ray sources and other transient systems.

Lizhong Zhang, James M. Stone, Christopher J. White, Shane W. Davis, Yan-Fei Jiang, Patrick D. Mullen2026-03-09🔭 astro-ph

Rotating neutron stars within the macroscopic effective-surface approximation

This paper extends the macroscopic effective-surface model of neutron stars to rotating systems by deriving analytical expressions for angular momentum and adiabatic moments of inertia within General Relativity, revealing that strong gravity and surface correlations significantly constrain the accessible neutron star radii.

A. G. Magner, S. P. Maydanyuk, A. Bonasera, H. Zheng, S. N. Fedotkin, A. I. Levon, T. Depastas, U. V. Grygoriev, A. A. Uleiev2026-03-09🔭 astro-ph

Parity in Composite-Field Galaxy Correlators

This paper introduces and validates two efficient "kurto spectra" estimators that compress the high-dimensional parity-odd trispectrum of galaxy clustering into one-dimensional observables, demonstrating their ability to detect parity violation in cosmological surveys by effectively mitigating noise through phase-matched subtraction and optimal weighting in both dark matter and halo fields.

Zucheng Gao, Azadeh Moradinezhad Dizgah, Zvonimir Vlah2026-03-09🔭 astro-ph

Supernovae Exploding within Dense Extended Material: Early Emission Regimes and Degeneracies in Parameter Inference from Observations

This paper presents an analytical framework for early supernova emission from shock interaction with extended material, demonstrating that current optical observations suffer from significant parameter degeneracies—particularly in inferring the material's radius—while highlighting the critical role of future UV and X-ray missions like ULTRASAT in resolving these uncertainties.

Tal Wasserman, Eli Waxman2026-03-09🔭 astro-ph

Excursion Set Approach to Primordial Black Holes: Cloud-in-Cloud and Mass Function Revisited

This paper reformulates the Press-Schechter approach for primordial black holes within the excursion-set framework to demonstrate that, unlike halo formation, the non-Markovian nature of the process invalidates the standard "fudge factor" correction, necessitating a consistent inclusion of both stochastic motion components to derive a physically valid mass function.

Ashu Kushwaha, Teruaki Suyama2026-03-09🔭 astro-ph