astro-ph.GA
55.9k resultsRevealing the Physical Driver of the Baldwin Effect: Gas Density in the Broad-Line Region
Wen-Qiang Liang, Zhi-Fu Chen, Rui-Jing Lu +8
The paper shows that the Baldwin effect in quasars is mainly driven by the gas density in the broad-line region, with higher Eddington ratios producing denser BLRs and shallower eq…
Searching in HI for Massive Low Surface Brightness Galaxies: II. Completing the UGC Sample
Karen O'Neil, Wim van Driel, Stephan Schneider
The paper reports new 21‑cm HI observations of 35 low surface brightness galaxies using the Green Bank Telescope, detecting 19 of them and adding accidental detections, to complete…
The X-ray-Weak Tail of the Quasar Population: Physical Properties and Redshift Evolution of Variability-Selected AGN in eFEDS
P. Arévalo, J. Buchner, M. Salvato +10
The paper examines AGN identified through optical variability in the eROSITA eFEDS survey, comparing those detected in X‑rays to those that are not, and finds that a substantial hi…
X-ray Absorption Variability in NGC 1142: Another Constraint on the Nature of the Torus/Broad-Line Region in Active Galactic Nuclei
Isaiah S. Cox, Núria Torres-AlbÃ, Stefano Marchesi +5
The paper analyzes nine X‑ray observations of the active galaxy NGC 1142 over ~20 years to study changes in line‑of‑sight column density, using torus models to infer the geometry a…
Constraining the shape of dark matter haloes using only starlight II. Tests of the technique with objects of known gravitational potential
Jorge Sanchez Almeida, Angel R. Plastino, Sergio Guerra Arencibia +2
The paper validates a photometry‑based Eddington Inversion Method (EIM‑tool) that tests whether observed stellar distributions are physically consistent with cuspy or cored dark‑ma…
Effects of a disk structure on stellar motion at the Galactic Center
Arianna Foschi, Frederic H. Vincent, Thibaut Paumard +1
The paper investigates how a thin, disk-like mass distribution around the Milky Way’s central black hole influences the orbits of nearby stars such as S2 and S301, providing analyt…
J-ATLAS: Javalambre Andromeda and Triangulum Legacy Astrophysical Survey
Borja Anguiano, Andres del Pino
J-ATLAS is a proposed wide-field optical photospectroscopic survey of the Andromeda (M31) and Triangulum (M33) galaxies that will obtain low‑resolution spectral energy distribution…
An Enhanced Catalog of Gaia DR3 Galaxy Candidates with Spectroscopic and Machine-Learning Photometric Redshifts
Junghyun Hwang, Ho Seong Hwang
The paper presents an updated all‑sky galaxy catalog based on Gaia DR3, adding spectroscopic redshifts where available and machine‑learning photometric redshifts for the rest, usin…
An Exploratory Analysis of New Large Gaia-informed Quasar Samples in SDSS-V
Shir Aviram, Benny Trakhtenbrot, Tom Dwelly +22
The paper presents an exploratory analysis of a new all‑sky quasar catalog from SDSS‑V, using Gaia‑ and WISE‑based selection methods (GUA and Skewt‑QSO) that yield over 250,000 spe…
The influence of feedback on the baryonic content of haloes in the COLIBRE simulations
Jonathan J. Davies, Joop Schaye, Filip Huško +7
The paper uses the COLIBRE cosmological simulations to study how supernova and AGN feedback affect the gas mass fraction of dark matter haloes across different masses, showing a no…
Stellar photoionisation modelling in SYNTHESIZER
Aswin P. Vijayan, Stephen M. Wilkins, Sophie L. Newman +5
The paper introduces photoionised gas emission modeling into the SYNTHESIZER code, allowing realistic stellar and nebular spectra to be generated for galaxy formation studies.
Superdiffusion at the Galactic Centre
Pau Amaro Seoane, Kostas Tzanavaris, Reinhard Genzel +14
The paper models the orbital evolution of the S‑star cluster around the Milky Way’s central black hole using a superdiffusive, fractional transport framework that accounts for long…
Exploring the Limits of Spectral Line Stacking in Spectral Line Data and Application Toward the Detection of Bulk $^{13}$C Enrichment of Aromatics in TMC-1
Miya Duffy, Ryan A. Loomis, Martin S. Holdren +9
The paper evaluates spectral line stacking and matched‑filter techniques to detect faint 13C‑substituted aromatic molecules in the cold cloud TMC‑1, demonstrating the method’s abil…
Semi-analytic Inference of Satellite Densities in the Cold Dark Matter Model Part I. Comparison to Ultra-faint Dwarf Kinematics
Kailash Raman, Dylan Folsom, Manoj Kaplinghat +2
The paper uses a semi‑analytic model of Milky Way satellite galaxies to predict their dark‑matter density profiles and compares these predictions to measurements of stellar velocit…
Cosmic Pairs: A DESI Census of Dual and Offset AGN as Precursors to Massive Black Hole Binaries
Ekaterine Dadiani, Antonella Palmese, Yihao Zhou +52
The paper presents a large, uniformly selected spectroscopic catalog of dual and offset active galactic nuclei from the first DESI data release, analyzing their host galaxy propert…
SKAO-ALMA Synergies in Star Formation Science
Jan Forbrich, Gary A. Fuller, Mark A. Thompson +7
From compact jets to extended lobes: radio morphologies of distant quasars at z > 4
K. Ã. Gabányi, M. Kunert-Bajraszewska, A. Krauze +9
Chemistry of Dark Molecular Clouds
Yuri Aikawa, Izaskun Jimenez-Serra, Paola Caselli
Distribution of the magnetic field relative to the plane of the Galaxy in the region of the Sagittarius spiral arm
R. R. Andreasyan, H. R. Andreasyan, A. M. Mickaelian +2
From Starburst to Quenching: Physical Properties of Extremely Compact Starbursts at z$\sim$0.1
Can Xu, Mengyuan Xiao, Min Bao +5
Chemical modelling of interstellar MgS
M. Rey-Montejo, I. Jimenez-Serra, T. Millar +8
Ly$α$ Escape in JWST/NIRCam F430M-Selected H$α$ Emitters at $z\simeq5.5$
Cheng Cheng, Zhen-Ya Zheng, Chunyan Jiang +8
Compiling the largest multiwavelength database of known changing-look AGN: Prospects in the Rubin era
Mariangella Camus, Swayamtrupta Panda
A new look at old devils. II: New insights on classical radio galaxies from MeerKAT and uGMRT
Portia P. Legodi, Tiziana Venturi, Dharam V. Lal +3