Showing 2026 · astro-ph.GAShow all

16 papers · 2 filters

astro-ph.GA2026

High-spectral-resolution Observations of the [S II] Emission-line Doublet in the Filamentary Nebula Surrounding NGC 1275

Benjamin Vigneron, Julie Hlavacek-Larrondo, Carter Lee Rhea +10

We analyze new high-spectral resolution SITELLE observations (R = = 7000) of the filamentary nebula surrounding NGC 1275, central galaxy of the Perseus cluster. We present h…

astro-ph.GA2026★ 1 cited

Direct detection of cool molecular gas in a star-forming galaxy at

Karin Cescon, Jacqueline A. Hodge, Leindert A. Boogaard +21

We investigate the molecular gas content and interstellar medium (ISM) conditions of REBELS-25, a massive, star-forming galaxy at . Deep VLA Q-band and ALMA Band 3 observat…

astro-ph.GA2026

Learning the Universe: The Structure of Dust Attenuation Curves in Galaxy Simulations

Laura Sommovigo, Deaglan J. Bartlett, Rachel K. Cochrane +3

Dust attenuation is a major source of systematic uncertainty in both SED fitting and forward modeling of galaxy populations, yet the functional form used to parameterize attenuatio…

astro-ph.GA2026★ 2 cited

Milky Way Mapper decoded abundances -- I. Shared disc enrichment patterns

Melissa K. Ness, Sarah Aquilina, Jennifer Mead +15

Elemental abundances in the Milky Way disc trace its star-formation and enrichment history, but predicting these abundances from theory is limited by uncertain nucleosynthetic yiel…

astro-ph.GA2026

ArkenstoneBH. A model for high-specific energy black hole feedback in cosmological simulations

James M. Sullivan, Greg L. Bryan, Matthew C. Smith +6

AGN feedback is a key piece of galaxy evolution but is difficult to model due to its high specific energies, multiphase nature, and limited simulation resolutions. Arkenstone is a…

astro-ph.GA2026★ 1 cited

Resolving the Unresolved Galactic Winds in Multi-phase Models. I. Methodology and Application

Xinfeng Xu, Drummond Fielding, Timothy Heckman +12

Galactic winds shape galaxy evolution; however, the outflowing gas is complex: it consists of multiple ionization phases, and its properties vary spatially. Therefore, methods that…

astro-ph.GA2026

Chemistry and ro-vibrational excitation of CH in the planetary nebula NGC 7027

Milan Sil, Alexandre Faure, Helmut Wiesemeyer +5

Small carbon hydride cations, such as the methylidyne ion (CH), play an important role in the chemistry of the interstellar medium (ISM). They participate in gas-phase reaction…

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

Too Big to Quench? I. Constraining ISM Stripping of Dwarf Satellites in Milky Way-like Halos

Jingyao Zhu, Stephanie Tonnesen, Greg L. Bryan +1

Galaxy environment plays a crucial role in quenching star formation in dwarf galaxies. In Milky Way (MW)-like environments, dwarf satellite quenching is primarily driven by ram pre…

astro-ph.GA2026

Mainly on the Plane: Observing the Extended, Ionized Disks of Milky Way Analogs in IllustrisTNG

Michael Messere, Kirill Tchernyshyov, Mary E. Putman +4

This paper explores the extent to which the circumgalactic medium (CGM) of Milky Way-like galaxies is located in an extended, ionized, disklike structure. To test this hypothesis,…

astro-ph.GA2026

Evolution of fractality in centrally concentrated young clusters

Almat Akhmetali, Adilkhan Assilkhan, Mordecai-Mark Mac Low +6

We investigate the structural evolution of young star clusters forming within centrally concentrated molecular clouds. Our simulations use the Torch framework, which integrates the…

astro-ph.GA2026★ 4 cited

A Morphology Catalog of Galaxies in CEERS: Evolution in the Size and Color Gradients of Galaxies Since Cosmic Dawn

Elizabeth J. McGrath, Steven L. Finkelstein, Guillermo Barro +42

We present measurements of morphological parameters from fitting 53,885 galaxies detected to a magnitude limit of F356W in the CEERS NIRCam imaging with galfit in six broad…

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★ 8 cited

Connecting the Dots: UV-Bright Companions of Little Red Dots as Lyman-Werner Sources Enabling Direct Collapse Black Hole Formation

Josephine F. W. Baggen, Matthew T. Scoggins, Pieter van Dokkum +3

We compile a sample of 83 Little Red Dots (LRDs) with JWST imaging and find that a substantial fraction (43%, rising to 85% for the most luminous LRDs) host one or m…

astro-ph.GA2026

Investigating HII Regions in the Disk of NGC 7331 with the Circumgalactic H Spectrograph

Nazende Ipek Kerkeser, Nicole Melso, David Schiminovich +3

We investigate the ionized gas kinematics of HII regions in the disk of NGC 7331 using integral field unit data collected with the Circumgalactic H Spectrograph (CHS). NGC 73…

astro-ph.GA2026★ 1 cited

Hunting the first Cosmic Giants: formation and detectability of Direct Collapse Black Holes around high-redshift quasars

Alessandro Trinca, Alessandro Lupi, Zoltán Haiman +4

The rapid emergence of supermassive black holes (SMBHs) in the early Universe poses a challenge to current models of black hole growth. One promising formation pathway is the direc…