activity
20092026
most citedMass and environment as drivers of galaxy evolution in SDSS and zCOSMOS and the origin of the Schechter function

2k citations · 8.4k across the 110 of their papers we have counts for

collaborators

110 papers

astro-ph.GA2026

Cool CGM MgII Absorption Across the Star-Forming, Green Valley, and Quiescent Transition

Simon Xinlin Wu, Rongmon Bordoloi, Robert A. Simcoe +4

We investigate the distribution and kinematics of cool circumgalactic medium (CGM) gas across the star-forming to quiescent transition using MgII absorption for 716 galaxies spanni…

astro-ph.GA2026

The GOLIATH Survey: OVI Absorption Reveals CGM Evolution through the Starburst-to-Quiescent Transition in Massive Galaxies

Derick Flores, Rongmon Bordoloi, Jason Tumlinson +12

We present the GOLIATH survey (Galaxies, Outflows, and the Lifecycle of Immense, Active, Transforming Halos), a study of the multiphase circumgalactic medium (CGM) of massive ($\la…

astro-ph.GA2026

Spatial decomposition of Little Red Dots with JWST/NIRSpec IFU into broad-line red cores and narrow-line blue host galaxies

Yuzo Ishikawa, Anna-Christina Eilers, Rohan P. Naidu +11

Little Red Dots (LRDs) are a population of compact red sources discovered by the James Webb Space Telescope (JWST). Imaging and spectroscopy have shown that LRDs exhibit a complex…

astro-ph.GA2026

Little Red Dots at z~2 in EIGER reveal a gentle decline with respect to their peak number density at z~5

Shrriya Kapoor, Jorryt Matthee, Alberto Torralba +10

We report the discovery of a sample of little red dots (LRDs) at identified from deep JWST/NIRCam imaging and wide-field slitless spectroscopy over arcmin f…

astro-ph.IM2026

Revealing Cosmic Ecosystems with the Hubble Space Telescope in 2030s and Beyond

Sanchayeeta Borthakur, Tanmay Singh, David French +22

Ultraviolet spectroscopy with the Hubble Space Telescope (HST) provides the most direct and sensitive probe of the disk-circumgalactic medium (CGM) interface at radii of 20 kpc, wh…

astro-ph.GA2026

A Decade to Map the Diffuse Universe: FRB-QSO Pairs with HST/COS Spectroscopy

Jessica Werk, Matthew McQuinn, J. Xavier Prochaska +16

Jointly analyzing the sightlines of arcsecond-localized fast radio bursts (FRBs) and UV-bright quasars (QSOs) nearby in projection has the potential to provide strong constraints o…

astro-ph.GA2026

First-star imprints in a metal-poor galaxy overdensity near the end of reionization

Zihao Li, Koki Kakiichi, Lise Christensen +24

The first generation of stars, known as Population III (Pop III), formed from primordial gas consisting solely of hydrogen and helium and is believed to have emerged only a few hun…

astro-ph.GA2026

High-S/N Quasar Observations with HST/COS: Deep Fields for Spectroscopy

Andrew J. Fox, Jerry Kriss, Philipp Richter +49

Hubble is still in prime observing condition for making transformative discoveries in UV astronomy. In this white paper we describe the science case for a deep (S/N>30) UV spectros…

astro-ph.GA2026

Closing the UV Gap: Rest-frame EUV science from high-redshift QSOs as a legacy-defining capability

Rongmon Bordoloi, J. Michael Shull

The Hubble Space Telescope is the only high-resolution ultraviolet spectroscopic facility that will exist until the Habitable Worlds Observatory (HWO) achieves first light in the m…

astro-ph.GA2026★ 1 cited

The Engine and its Flows: Little Red Dot spectra are shaped by the column densities of their gas envelopes

Jorryt Matthee, Alberto Torralba, Gabriele Pezzulli +23

JWST data have enabled the abundant identification of compact broad Balmer line sources nicknamed the Little Red Dots. While they share broad lines with active galactic nuclei, the…

astro-ph.GA2026

Low Metallicity Gas on the Outskirts of the Local Group: the Circumgalactic Medium of Sextans B

Andrew J. Fox, Sapna Mishra, Frances H. Cashman +6

We present a UV absorption-line analysis of the circumgalactic medium (CGM) of Sextans B, a dwarf irregular galaxy at 1.3 Mpc distance on the outer frontier of the Local Group. Usi…

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

The Synthetic Absorption Line Spectral Almanac (SALSA)

Dylan Nelson, Celine Peroux, Philipp Richter +10

We create the first large-scale mock spectroscopic survey of gas absorption sightlines traversing the interstellar medium (ISM), circumgalactic medium (CGM), and intergalactic medi…

astro-ph.GA2025

EIGER VIII: First stars signatures in the connection between OI absorption and Galaxies in the Epoch of Reionization

Jack Higginson, Rongmon Bordoloi, Robert A. Simcoe +8

We investigate the association between galaxies and neutral OI absorption systems at z~6, which trace metal-enriched gas during the epoch of reionization. We identify 40 galaxies a…

astro-ph.GA2025

The Light Echo of a High-Redshift Quasar mapped with Lyman- Tomography

Anna-Christina Eilers, Minghao Yue, Jorryt Matthee +11

Ultra-violet (UV) radiation from accreting black holes ionizes the intergalactic gas around early quasars, carving out highly ionized bubbles in their surroundings. Any changes in…

astro-ph.GA2025

Quasar Spectral Energy Distributions in the Rest-Frame EUV: Hubble-COS Spectra of Two Ultra-luminous Quasars

J. Michael Shull, Rongmon Bordoloi, Charles W. Danforth

Using the Cosmic Origins Spectrograph (COS) aboard the Hubble Space Telescope with both far-UV (FUV) and near-UV (NUV) gratings, we measure the ionizing spectra of two bright, inte…

astro-ph.GA2025

Escape fractions from unattenuated Ly emitters around luminous quasars

Minghao Yue, Anna-Christina Eilers, Jorryt Matthee +7

Ionized proximity zones around luminous quasars provide a unique laboratory to characterize the Ly emission lines from galaxies without significant attenuation from the in…

astro-ph.GA2025★ 1 cited

Project AMIGA: The Inner Circumgalactic Medium of Andromeda from Thick Disk to Halo

Nicolas Lehner, J. Christopher Howk, Lucy Collins +22

The inner circumgalactic medium (CGM) of galaxies, where disk and halo processes intersect, remains poorly characterized despite its critical role in regulating galaxy evolution. W…

astro-ph.GA2025

Characterizing gas flows through observations of the disk-CGM interface with the HWO

Sanchayeeta Borthakur, Joseph N. Burchett, Frances Cashman +5

How gas gets into, through, and out of galaxies is critical to understanding galactic ecosystems. The disk-CGM interface region is uniquely suited for studying processes that drive…

astro-ph.GA2025★ 1 cited

EIGER VII. The evolving relationship between galaxies and the intergalactic medium in the final stages of reionization

Daichi Kashino, Simon J. Lilly, Jorryt Matthee +7

We present a comprehensive analysis of the relationship between galaxies and the intergalactic medium (IGM) during the late stages of cosmic reionization, based on the complete JWS…

astro-ph.GA2025

Ultraviolet Properties of Multi-phase Gas Toward the Inner Galaxy

Frances H. Cashman, Andrew J. Fox, Debopam Som +6

We present a systematic study of the multi-phase interstellar gas in the Inner Galaxy using HST/STIS absorption spectroscopy of 16 massive stars located at spectroscopic distances…

astro-ph.GA2025★ 2 cited

A New High-latitude H I Cloud Complex Entrained in the Northern Fermi Bubble

Rongmon Bordoloi, Andrew J. Fox, Felix J. Lockman

We report the discovery of eleven high-velocity HI clouds at Galactic latitudes of 25-30 degrees, likely embedded in the Milky Way's nuclear wind. The clouds are detected with deep…

astro-ph.GA2025★ 6 cited

Spatially Resolved Circumgalactic Medium around a Star-Forming Galaxy Driving a Galactic Outflow at

Ahmed Shaban, Rongmon Bordoloi, John M. O'Meara +6

We report the small-scale spatial variation in cool () Mg II absorption detected in the circumgalactic medium (CGM) of a star-forming galaxy at . The CG…

astro-ph.GA2024

The CIViL* Survey: The Discovery of a C IV Dichotomy in the CGM of L* Galaxies

Samantha L. Garza, Jessica K. Werk, Trystyn A. M. Berg +4

This paper investigates C IV absorption in the circumgalactic medium (CGM) of L* galaxies and its relationship with galaxy star formation rates. We present new observations from th…