output
19922026
most citedObservation of Gravitational Waves from a Binary Black Hole Merger

14.2k citations

Showing astro-ph.GAShow all

504 papers · 1 filter

astro-ph.GA2026

Evidence for the First Globular Cluster Stellar Stream beyond the Milky Way

Julie Kiel Holm, Sarah Pearson, Jacob Nibauer +5

The dark matter content of ultra-diffuse galaxies is the subject of considerable debate. Stellar streams, which form when a host galaxy tidally strips stars from an orbiting stella…

astro-ph.GA2026

Cold vs. Hot Gas Accretion and Angular Momentum in FIRE Simulations: From Halo to Galaxy Scales

Imran Sultan, Claude-André Faucher-Giguère, Jonathan Stern +1

We present a systematic study of gas accretion and angular momentum in the circumgalactic medium (CGM) using high-resolution FIRE cosmological simulations. Our analysis includes ha…

astro-ph.GA2026

Constraining the mass of the M31 ionized baryon Halo using CHIME/FRB Catalog 2

Lordrick A. Kahinga, J. Xavier Prochaska, Sunil Simha +21

The circumgalactic medium (CGM) surrounding galaxies is believed to be a significant reservoir of baryons, yet its total mass remains poorly constrained. We present a novel approac…

astro-ph.GA2026★ 3 cited

Relatively Fast and Reasonably Furious: Evidence for Increased Burstiness in Smaller Halos at Cosmic Dawn

Julian B. Muñoz, John Chisholm, Guochao Sun +7

We introduce an effective framework to model star-formation burstiness and use it to jointly fit galaxy UV luminosity functions (UVLFs), clustering, and H/UV ratios, providing t…

astro-ph.GA2025★ 1 cited

Effects of Varied Cosmic Ray Feedback from AGN on Massive Galaxy Properties

Charvi Goyal, Sam B. Ponnada, Philip F. Hopkins +3

Active galactic nuclei (AGN) provide energetic feedback necessary to `turn off' star formation in high-mass galaxies (M 10 M, $10.4 \leq \log(…

astro-ph.GA2025★ 2 cited

Little Red Dots host Black Hole Stars: A unified family of gas-reddened AGN revealed by JWST/NIRSpec spectroscopy

Anna de Graaff, Raphael E. Hviding, Rohan P. Naidu +34

We use the DAWN JWST Archive to construct and characterise a sample of 146 little red dots (LRDs) across 2.0<z<9.3, selecting all sources with v-shaped UV-optical continua from NIR…

astro-ph.GA2025★ 1 cited

Hot accretion onto spiral galaxies: the origin of extended and warped HI discs

Sriram Sankar, Jonathan Stern, Chris Power +6

Gas accretion, hot ( K) atmospheres, and a tilt between the rotation axes of the disc and the atmosphere are all common predictions of standard galaxy evolution theory f…

astro-ph.GA2025★ 3 cited

Accretion-Driven Turbulence in the Circumgalactic Medium

Roy Goldner, Jonathan Stern, Drummond Fielding +3

Simulations suggest that turbulence is ubiquitous in the circumgalactic medium (CGM), though the source and properties of CGM turbulence is uncertain. Using analytic considerations…

astro-ph.GA2025★ 3 cited

Ultra-Faint Milky Way Satellites Discovered in Carina, Phoenix, and Telescopium with DELVE Data Release 3

C. Y. Tan, W. Cerny, A. B. Pace +76

We report the discovery of three Milky Way satellite candidates: Carina IV, Phoenix III, and DELVE 7, in the third data release of the DECam Local Volume Exploration survey (DELVE)…

astro-ph.GA2025

The chemodynamical memory of a major merger in a NIHAO-UHD Milky Way analogue -- I. A golden thread through time and space

Sven Buder, Tobias Buck, Ása Skúladóttir +3

Understanding how past major mergers shaped the Milky Way's present-day structure is a key goal of Galactic archaeology. The Galaxy's chemical and dynamical structure retains the i…

astro-ph.GA2025

Parsec-scale SiO emission in the Galactic Center

N. Wenner, C. J. Chandler, J. M. Michail +2

The central 5 parsecs of our Galactic Center is rich in various molecular tracers. The region is observed to be hot, highly ionized, and volatile, resulting in complex chemistry an…

astro-ph.GA2025★ 5 cited

Hierarchical Triples vs. Globular Clusters: Binary black hole merger eccentricity distributions compete and evolve with redshift

Andris Dorozsmai, Isobel M. Romero-Shaw, Aditya Vijaykumar +5

The formation mechanisms of merging binary black holes (BBHs) observed by the LIGO-Virgo-KAGRA collaboration remain uncertain. Detectable eccentricity provides a powerful diagnosti…

astro-ph.GA2025

The Low-mass Dwarf Host Galaxy of Nonrepeating FRB 20230708A

August R. Muller, Alexa C. Gordon, Stuart D. Ryder +19

We present Very Large Telescope/X-Shooter spectroscopy for the host galaxies of 12 fast radio bursts (FRBs) detected by the Australian SKA Pathfinder observed through the ``Fast an…

astro-ph.GA2025★ 4 cited

Galactic echoes

Rimpei Chiba, Jupiter Ding, Chris Hamilton +2

Gaia has revealed a variety of substructures in the phase space of stars in the Solar neighborhood, including the vertical `Snail' in space. Such substructures are often…

astro-ph.GA2025★ 1 cited

Constraining cosmic ray transport models using circumgalactic medium properties and observables

Yue Samuel Lu, Dušan Kereš, Philip F. Hopkins +3

Cosmic rays (CRs) are a pivotal non-thermal component of galaxy formation and evolution. However, the intricacies of CR physics, particularly how they propagate in the circumgalact…

astro-ph.GA2025

The Magnetic Keys to Massive Star Formation: The Western Carinae Giant Molecular Cloud

Peter J. Barnes, Stuart D. Ryder, Giles Novak +1

We present SOFIA/HAWC+ continuum polarisation data on the magnetic fields threading 17 pc-scale massive molecular clumps at the western end of the Car GMC (Region 9 of CHaMP, r…

astro-ph.GA2025★ 6 cited

The Lyman-alpha and Continuum Origins Survey II: the connection between the escape of ionizing radiation and Lyman-alpha halos in star-forming galaxies

A. Saldana-Lopez, M. J. Hayes, A. Le Reste +24

One of the current challenges in galaxy evolution studies is to establish the mechanisms that govern the escape of ionizing radiation from galaxies. Here, we investigate the connec…

astro-ph.GA2025★ 71 cited

A remarkable Ruby: Absorption in dense gas, rather than evolved stars, drives the extreme Balmer break of a Little Red Dot at

Anna de Graaff, Hans-Walter Rix, Rohan P. Naidu +25

The origin of the rest-optical emission of compact, red, high-redshift sources known as `little red dots' (LRDs) poses a major puzzle. If interpreted as starlight, it would imply t…

astro-ph.GA2025★ 6 cited

Trial by FIRE: Probing the dark matter density profile of dwarf galaxies with GraphNPE

Tri Nguyen, Justin Read, Lina Necib +4

The Dark Matter (DM) distribution in dwarf galaxies provides crucial insights into both structure formation and the particle nature of DM. GraphNPE (Graph Neural Posterior Estimato…

astro-ph.GA2025★ 10 cited

Evolution of the Sérsic Index up to z=2.5 from JWST and HST

Marco Martorano, Arjen van der Wel, Maarten Baes +12

The James Webb Space Telescope (JWST) is unveiling the rest-frame near-IR structure of galaxies. We measure the evolution with redshift of the rest-frame optical and near-IR Sérsic…

astro-ph.GA2024★ 9 cited

Learning the Universe: Cosmological and Astrophysical Parameter Inference with Galaxy Luminosity Functions and Colours

Christopher C. Lovell, Tjitske Starkenburg, Matthew Ho +9

We perform the first direct cosmological and astrophysical parameter inference from the combination of galaxy luminosity functions and colours using a simulation based inference ap…

astro-ph.GA2024★ 14 cited

UNCOVERing the High-redshift AGN Population among Extreme UV Line Emitters

Helena Treiber, Jenny Greene, John R. Weaver +23

JWST has revealed diverse new populations of high-redshift () AGN and extreme star-forming galaxies that challenge current models. In this paper, we use rest-frame UV em…

astro-ph.GA2024★ 20 cited

MSA-3D: Metallicity Gradients in Galaxies at with JWST/NIRSpec Slit-stepping Spectroscopy

Mengting Ju, Xin Wang, Tucker Jones +14

The radial gradient of gas-phase metallicity is a powerful probe of the chemical and structural evolution of star-forming galaxies, closely tied to disk formation and gas kinematic…

astro-ph.GA2024★ 1 cited

Modeling the Far-Infrared Polarization Spectrum of a High-Mass Star Forming Cloud

Dennis Lee, Che-Yu Chen, Giles Novak +7

The polarization spectrum, or wavelength dependence of the polarization fraction, of interstellar dust emission provides important insights into the grain alignment mechanism of in…