output
19922026
Showing astro-ph.GAShow all

745 papers · 1 filter

astro-ph.GA2026

A Partial Lyman Limit Absorber in the Halo of a Galaxy Pair: A Possible Signature of Gas Inflow

Sumukha R. Bharadwaj, Anand Narayanan, Sowgat Muzahid +2

We present an analysis of a partial Lyman limit system at z = 0.87641 detected in the HST/COS spectrum of the background quasar LBQS 0107-0235. The absorber exhibits a simple kinem…

astro-ph.GA2026

Implications of Broad [O III] 4364 and UV Line Emission in Two Little Red Dots at z ~ 7 - 8

Casey Papovich, Kaila Ronayne, Weida Hu +17

We present deep, NIRSpec G140M and G395M spectroscopy of Little Red Dots (LRDs) at z = 6.68 and z = 8.35. Both LRDs show broad Balmer and [O III] 4364 emission. The broad [O III…

astro-ph.GA2026

A Compact Proto-group at : A Massive Galaxy Caught in Formation

Ronaldo Laishram, Yusei Koyama, Fengwu Sun +11

We report the discovery of SCGG-z5, a compact galaxy proto-group at in the MACS0416 field, identified from the SAPPHIRES Early Data Release. Six members are spectroscopi…

astro-ph.GA2026★ 1 cited

Investigating the role of turbulence in the interstellar medium in dusty star-forming galaxies using kpc-resolution ALMA dust and gas maps

B. A. Westoby, J. A. Hodge, P. Sharda +28

We present ALMA high-resolution (0.25/2 kpc) CO(5-4) and CO(4-3) observations of three submillimetre-selected dusty galaxies from the ALESS survey.…

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★ 1 cited

HETDEX Public Data Release 1: Source Catalog 2 and Data Cubes from ~90 sq deg of Integral-Field Optical Spectroscopy

Erin Mentuch Cooper, Karl Gebhardt, Dustin Davis +36

The Hobby-Eberly Telescope Dark Energy Experiment (HETDEX) is a wide-field, integral-field spectroscopic survey designed to map the large-scale distribution of Lyman-alpha emitting…

astro-ph.GA2026

SDSS-V: Revealing a weak accretion state in X-ray selected red quasars

Paloma Guetzoyan, James Aird, Amy L. Rankine +17

Red quasars (rQSOs) have been recognized as a short-lived, early stage in the evolutionary cycle of Active Galactic Nuclei (AGN), with fundamental differences in their intrinsic pr…

astro-ph.GA2026★ 2 cited

Robust AGN and host-galaxy decomposition in optical spectral fitting

C. Aydar, A. Merloni, G. Zeltyn +24

Unraveling the growth of supermassive black holes and their connection to host galaxies requires disentangling the Active Galactic Nuclei (AGN) emission from that of the stellar po…

astro-ph.GA2026★ 2 cited

CIV wind properties of the SDSS-V X-ray selected quasars: strong optical-to-UV emission is key regardless of X-ray strength

Amy L. Rankine, David Homan, James Aird +25

We present an investigation of the rest-frame optical/UV and X-ray properties for a sample of 3027 X-ray selected quasars between detected in the deepest Spec…

astro-ph.GA2026

The Dyson Minds 2025 Workshop: SETI around Black Holes

Olivia Curtis, Van Hunter Adams, Daniel Angerhausen +9

The Dyson Minds 2025 Workshop, held at the Center for Brains, Minds & Machines at MIT and organized by Penn State, MIT, and The Ultraintelligence Foundation, brought together resea…

astro-ph.GA2026★ 1 cited

Identifying Changing-Look AGN Transitions in Light Curve Data with the Zwicky Transient Facility

Margaret E. Verrico, K. Decker French, Vivienne F. Baldassare +10

Changing-Look AGN (CL-AGN) are AGN which transition between Seyfert types, challenging AGN unification models. Most CL-AGN have been identified via repeat spectroscopy, making it d…

astro-ph.GA2026

Out of oxygen: Extremely metal-poor galaxy candidates identified at with deep JADES medium-band imaging

James A. A. Trussler, Daniel J. Eisenstein, Andrew J. Bunker +27

JWST is beginning to uncover a population of extremely metal-poor galaxies (EMPGs, ) at , mostly through serendipitous NIRSpec discoveries and blin…

astro-ph.GA2026

AGILE: an end-to-end Rubin-LSST simulation of AGNs, galaxies, and stars I. Software description and first data release

A. Viitanen, A. Bongiorno, I. Saccheo +37

Contemporary large-scale surveys such as the Vera C. Rubin Observatory Legacy Survey of Space and Time (LSST) and Euclid present an unprecedented discovery potential for studying A…

astro-ph.GA2026★ 3 cited

Lyα Nebulae in HETDEX: The Largest Statistical Census Bridging Lyα Halos and Blobs across Cosmic Noon

Erin Mentuch Cooper, Karl Gebhardt, Dustin Davis +20

The Hobby-Eberly Dark Energy Experiment (HETDEX) is an untargeted ~540 deg^2 spectroscopic survey of Lyα emission in the 1.9 < z < 3.5 Universe. In surface brightness, this survey…

astro-ph.GA2026

ODIN: Confirmation and 3D Reconstruction of Six Massive Protoclusters at Cosmic Noon

Ashley Ortiz, Vandana Ramakrishnan, Kyoung-Soo Lee +64

Protoclusters represent sites of accelerated galaxy formation and extreme astrophysical activity characteristic of dense environments. Identifying massive protoclusters and mapping…

astro-ph.GA2026

Everything Every Band All at Once I: A Global Morphology Catalog in Abell 2744 based on UNCOVER/MegaScience

Yunchong Zhang, Tim B. Miller, Sedona H. Price +31

We present spectrally-resolved structural parameter measurements of 28,274 sources from the legacy lensing field of Abell 2744, quantifying global structures from observed $0.7 μm…

astro-ph.GA2026★ 1 cited

ReveaLLAGN 1: JWST Emission-Line Spectra Reveal Low-Luminosity AGN with UV-Deficient SEDs and Warm Molecular Gas

Kameron Goold, Anil Seth, Mallory Molina +20

We present near- and mid-infrared spectra of eight Low-Luminosity Active Galactic Nuclei (LLAGN), spanning nearly four orders of magnitude in black hole mass and Eddington ratio, o…

astro-ph.GA2026★ 1 cited

ASPIRE: The Environments and Dark Matter Halos of Luminous Quasars in the Epoch of Reionization

Feige Wang, Jaclyn B. Champagne, Jiamu Huang +42

We present a systematic study of the environments of 25 luminous quasars at from the ASPIRE program. Using JWST/NIRCam WFSS data, we identified 487 galaxies at $5.3 \less…

astro-ph.GA2026

pop-cosmos: Redshifts and physical properties of KiDS-1000 galaxies

Anik Halder, Hiranya V. Peiris, Stephen Thorp +8

Principled Bayesian inference of galaxy properties has not previously been performed for wide-area weak lensing surveys with millions of sources. We address this gap by applying th…

astro-ph.GA2026

Properties of Polarized Radio Sources in the Wide Chandra Deep Field South from 2 to 4GHz

Samantha Adams, Mark Lacy, Preshanth Jagannathan +14

We present a study of the linear polarization properties of radio sources within the 10 deg Wide Chandra Deep Field South (W-CDFS) in S-band (2-4 GHz). Our W-CDFS image has an…

astro-ph.GA2026★ 5 cited

JWST Advanced Deep Extragalactic Survey (JADES) Data Release 5: Photometric Catalog

Brant E. Robertson, Benjamin D. Johnson, Sandro Tacchella +34

JADES Data Release 5 (DR5) photometric catalogs and describes the methodologies used for source detection, deblending, photometry, uncertainty estimation, and catalog curation. The…

astro-ph.GA2026

Nitrogen abundances in star-forming galaxies 2.2 Gyr after the Big Bang are not elevated

D. Schaerer, Y. I. Izotov, R. Marques-Chaves +22

Using deep medium-resolution JWST rest-optical spectra of a sample of typical star-forming galaxies (Lyman break galaxies and Lyman- emitters) from the LyC22 survey at $z \sim 3…

astro-ph.GA2026★ 5 cited

Little Red Dot Host Galaxy Black Hole Star: A Gas-Enshrouded Heart at the Center of Every Little Red Dot

Wendy Q. Sun, Rohan P. Naidu, Jorryt Matthee +30

The central engines of Little Red Dots (LRDs) may be ``black hole stars" (BH*s), early stages of black hole growth characterized by dense gas envelopes. So far, the most direct evi…

astro-ph.GA2026★ 1 cited

ODIN: Clustering Properties of Ly Blobs at 2.4 and 3.1

Byeongha Moon, Yujin Yang, Eric Gawiser +18

Spatially extended Ly nebulae, known as Ly blobs (LABs), are a rare population at that are thought to trace proto-groups or the progenitors of massive galaxies in the…