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astro-ph.GA2025

Disturbed cold gas in galaxy and structure formation

Siwei Zou, Robert A. Simcoe, Patrick Petitjean +18

Cold and cool gas (T K) in the circumgalactic medium (CGM) and its interaction with galaxies remain poorly understood. Simulations predict that cold gas flows into gala…

astro-ph.GA2025

Insights on Metal Enrichment and Environmental Effect at with JWST ASPIRE/EIGER and Chemical Evolution Model

Zihao Li, Koki Kakiichi, Lise Christensen +15

We present the mass-metallicity relation (MZR) for a parent sample of 604 galaxies at with \OIII\ doublets detected, using the deep JWST/NIRCam wide field slitless sp…

astro-ph.GA2025

Quasar lifetime measurements from extended Ly nebulae at

Dominika Ďurovčíková, Anna-Christina Eilers, Romain A. Meyer +7

The existence of billion-solar-mass black holes hosted in luminous quasars within the first gigayear of cosmic history poses a challenge to our understanding of supermassive black…

astro-ph.GA2025

An extremely metal-poor Lyman emitter candidate at revealed through absorption spectroscopy

Dominika Ďurovčíková, Anna-Christina Eilers, Robert A. Simcoe +10

We report the discovery of a Lyman emitter (LAE) candidate in the immediate foreground of the quasar PSO J158-14 at at a projected distance $\sim29\ {\rm…

astro-ph.GA2025

Another piece to the puzzle: radio detection of a JWST detected AGN candidate

Anniek J. Gloudemans, Kenneth J. Duncan, Anna-Christina Eilers +5

Radio observations can provide crucial insight into the nature of a new abundant and mysterious population of dust-reddened active galactic nuclei (AGN) candidates discovered by th…

astro-ph.EP2025

An Early Look at the Performance of IGRINS-2 at Gemini-North with Application to the ultrahot Jupiter, WASP-33 b

Yeon-Ho Choi, Ueejeong Jeong, Jae-Joon Lee +56

Ground-based high-resolution spectroscopy enables precise molecular detections and velocity-resolved atmospheric dynamics, offering a distinct advantage over low-resolution methods…