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19922026
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844 papers · 1 filter

astro-ph.GA2026

The Age-Thickness Relation as a Tracer of the Merger History of Disk Galaxies

Lekshmi Thulasidharan, Elena D'Onghia, Robert Benjamin +2

In the hierarchical framework of galaxy formation, disk galaxies are shaped by a sequence of mergers and interactions, yet reconstructing this history from observations remains cha…

astro-ph.GA2026★ 1 cited

A New Member of the Fast and Furious Family: A Relativistic and Time-Variable UV Outflow in a Luminous Quasar

Lucas M. Seaton, Patrick B. Hall, Liliana Flores +20

We report the fastest quasar outflow first detected in the ultraviolet, via variable C IV and Si IV absorption at outflow velocities km s to at least km…

astro-ph.GA2026

Compact Core, Extended Reach: A Bipolar kpc-Scale Elongation in a Little Red Dot at

Zhiyuan Ji, Yang Sun, Mauro Giavalisco +7

Little Red Dots (LRDs) appear extremely compact at rest-frame optical wavelengths, yet many show extended rest-frame UV morphology revealing more complex internal structure. We pre…

astro-ph.GA2026

Toward Unbreaking the Universe: MINERVA Measurements of Color Gradients in Massive Quiescent Galaxies Can Help Ease Too-Early Star Formation Tensions

Sam E. Cutler, Luke Robbins, Danilo Marchesini +41

The discovery of a population of massive, ancient quiescent galaxies within the first 2 Gyr of the Universe's history has led to significant tensions with models of galaxy formatio…

astro-ph.GA2026

Revisiting ram pressure stripping in Wolf-Lundmark-Melotte: No evidence for stripped HI with LGLBS

Daniel R. Rybarczyk, Eric W. Koch, Fabian Caballero Vargas +12

We analyze HI 21-cm observations of the Local Group dwarf galaxy Wolf-Lundmark-Melotte (WLM) from the Local Group L-Band Survey to search for evidence of ram pressure stripping. Wh…

astro-ph.GA2026★ 1 cited

A Redshift-based Red Selection of Dusty Star-forming Galaxies

A. J. Barger, L. L. Cowie, S. J. McKay +1

We use JWST observations (1.5 micron to 4.44 micron), together with complete ALMA observations (870 micron and/or 1.2 mm), of the massive lensing cluster field A2744 to show that g…

astro-ph.GA2026

Revealing the cold skeleton of the Magellanic Clouds and the Magellanic Bridge with ASKAP

James Dempsey, N. M. McClure-Griffiths, Antoine Marchal +14

We present the GASKAP-HI pilot absorption survey of neutral hydrogen (HI) in the Magellanic system. This survey provides 3219 sightlines across the Large (LMC) and Small Magellanic…

astro-ph.GA2026

Compact near infrared sources in the center of the extraordinary galaxy IC 860

J. S. Gallagher, L. Schisgal, G. C. Privon +7

Hubble Space Telescope (HST) images are used to study the structure of the central regions of the luminous infrared galaxy (LIRG) IC 860. IC 860 is of special interest as a system…

astro-ph.GA2026

CHILES XII: The H I evolution of Luminous Compact Blue Galaxies between 0<z<0.48

H. Arlow, D. J. Pisano, M. A. Bershady +6

We study the evolution of Luminous Compact Blue Galaxies (LCBGs) by making use of H I emission line data provided by the full 856 h COSMOS H I Large Extragalactic Survey (CHILES),…

astro-ph.GA2026

An 18 - 25 GHz spectroscopic survey of southern hemisphere dense cores

Dariusz C. Lis, Karen Willacy, Liton Majumdar +3

We extended the radio K-band spectroscopic survey for organics in southern hemisphere dense cores by observing seven sources using NASA's Deep Space Network 70-m antenna in Canberr…

astro-ph.GA2026★ 3 cited

A Fast, Hot Wind from a Nuclear Starburst

XRISM Collaboration, Marc Audard, Hisamitsu Awaki +137

Galaxies with intense star formation often host multiphase, galaxy-scale winds powered by supernovae and fast stellar winds. These are strong enough to disrupt the star-forming int…

astro-ph.GA2026★ 1 cited

Galaxy UV Legacy Project: Survey Description and First Insights Into NGC 4449 Recent History of Star Formation

E. Sabbi, B. Meena, P. Zeidler +18

The Galaxy UV Legacy Project (GULP) is a Cycle 28 Treasury program with the Hubble Space Telescope (HST) designed to characterize resolved massive stars, OB associations, and young…

astro-ph.GA2026

The dependence of triggering mechanisms on radio AGN sub-types: the role of galaxy mergers

Freya Barwell, Clive N. Tadhunter, Jonathon C. S. Pierce +10

Powerful, radio-loud active galactic nuclei (AGN) are associated with one of the most important forms of AGN feedback, and understanding how they are triggered is key to properly i…

astro-ph.GA2026

Obscured AGN at z < 1.5: X-ray to Far-Infrared SEDs and Host Galaxy Morphologies in the GOODS Fields

William W. H. Jarvis, Connor Auge, David Sanders +9

We present an analysis of spectral energy distributions (SEDs), galaxy light profiles, and visual morphological classifications for 194 X-ray luminous AGN (intrinsic absorption-cor…

astro-ph.GA2026

Calibrating Mid-Infrared Emission Features As Diagnostics of Star Formation in Infrared-Luminous Galaxies via Radiative Transfer Modeling

L. Robinson, D. Farrah, A. Efstathiou +13

Luminous infrared galaxies are key sites of obscured stellar mass assembly at z > 0.5. Their star formation rates (SFRs) are often estimated using the luminosities of the 6.2 micro…

astro-ph.GA2025★ 2 cited

LEGA-C stellar populations scaling relations. I: Chemo-archaeological downsizing trends at z~0.7

Anna R. Gallazzi, Stefano Zibetti, Arjen van der Wel +11

We analyze stellar population properties of 552 galaxies at redshift 0.6<z<0.77 from the LEGA-C spectroscopic survey. This first paper in a series presents the catalog of revised a…

astro-ph.GA2025★ 4 cited

Rapid, out of equilibrium metal enrichment indicated by a flat mass-metallicity relation at z~6 from NIRCam grism spectroscopy

Gauri Kotiwale, Jorryt Matthee, Daichi Kashino +17

We aim to characterise the mass-metallicity relation (MZR) and the 3D correlation between stellar mass, metallicity and star-formation rate (SFR) known as the fundamental metallici…

astro-ph.GA2025★ 1 cited

LEGA-C stellar populations scaling relations. II: Dissecting mass-complete archaeological trends and their evolution since z~0.7 with LEGA-C and SDSS

Anna R. Gallazzi, Stefano Zibetti, Arjen van der Wel +11

With a sample of 552 galaxies at z~0.7 from the LEGA-C survey, we investigate how current star formation influences light-weighted mean stellar ages and metallicities, and their me…

astro-ph.GA2025

Isolated massive star candidates in NGC 4242 with GULP

Pietro Facchini, Eva K. Grebel, Anna Pasquali +16

There is considerable debate on how massive stars form, including whether a high-mass star must always form with a population of low-mass stars or whether it ca…

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

Azimuthal Misalignments in Stellar Warp Structure as Dynamical Tracers of Mergers in Milky Way-like Galaxies

Lekshmi Thulasidharan, Elena D'Onghia, Robert Benjamin

We investigate the origin of warps in stellar disks using high-resolution Milky Way analogs from the IllustrisTNG50 simulation. Focusing on galaxies that experienced a major merger…

astro-ph.GA2025★ 3 cited

Resolving the Nuclear Environments of Tidal Disruption Event Host Galaxies within 45 pc

Megan Newsome, Iair Arcavi, K. Decker French +5

Using HST/STIS observations, we present the highest-spatial-resolution spectroscopic study to date of four tidal disruption event (TDE) host galaxies, with the best observed being…

astro-ph.GA2025

Starburst galaxies in the Hydra I cluster

Clara C. de la Casa, Kelley M. Hess, Lourdes Verdes-Montenegro +10

We present a new catalog of 196 galaxies of the nearby Hydra I cluster out to 1.75, consisting of broad u,g,r,i,z along with narrowband H measurements. These…

astro-ph.GA2025★ 9 cited

JADES Data Release 4 Paper I: Sample Selection, Observing Strategy and Redshifts of the complete spectroscopic sample

Emma Curtis-Lake, Alex J. Cameron, Andrew J. Bunker +34

This paper accompanies Data Release 4 of the JWST Deep Extragalactic Survey (JADES), which presents the full NIRSpec spectroscopy of the survey. We provide spectra of 5190 targets…