44 citations · 189 across the 22 of their papers we have counts for
24 papers
Forming Molecular Hydrogen in a Galaxy Halo Through Star Formation Wind Interactions
Brad Koplitz, Sanchayeeta Borthakur, Timothy Heckman +5
Molecular hydrogen (H) is the key ingredient for star formation in galaxies. However, how H is distributed in and around galaxies is an open question in astronomy. We repor…
Tracing Winds through the Fog: A Comprehensive Survey of LMC's Galactic Outflows with ULLYSES
Suraj Poudel, April Horton, Kathleen A. Barger +21
We investigate nearside stellar-driven outflows from the Large Magellanic Cloud (LMC) using UV absorption-line spectroscopy of 170 OB stars, complemented by HI 21-cm emission and H…
The future of high-resolution UV spectroscopy: Science with a UV Échelle spectrograph on the Habitable Worlds Observatory, or a dedicated mission
Annalisa De Cia, David Cont, Kevin Heng +39
High-resolution UV spectroscopy serves a diversity of science cases, from small bodies to planets, stars, and galaxies, but is currently limited to the Hubble Space Telescope and b…
Early Exploration of the Scientific Discovery Space for the Habitable Worlds Observatory
Courtney D. Dressing, Danica Adams, Evelyne Alecian +324
The Habitable Worlds Observatory (HWO) is a future NASA flagship mission concept identified by the Astro2020 Decadal Survey as the highest priority for large space missions. HWO sh…
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…
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…
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…
New Interpretation for the Orientation of the LMC's Gaseous Arms B and E using ULLYSES
April Horton, Suraj Poudel, Kathleen A. Barger +20
The Large Magellanic Cloud (LMC) experiences disruption from tidal and ram-pressure forces as it travels through the halo of the Milky Way. In this project, we combine radio emissi…
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…
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…
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…
Dust in the Smith Cloud? A UV Investigation into the Smith Cloud's Gas-Phase Abundance Patterns
Johanna Vazquez, Kathleen Barger, Frances Cashman +11
The Smith Cloud is a high-velocity cloud (HVC) on its final approach to the Milky Way that shows evidence of interaction with the Galaxy's disk. We investigate the metallicity and…
The Gaseous Blowout of the 30 Doradus Starburst Region in the LMC
Suraj Poudel, April Horton, Jo Vazquez +20
Widespread galactic winds emanate from the Large Magellanic Cloud (LMC), with the 30 Doradus starburst region generating the fastest and most concentrated gas flows. We report on t…
The Warm-Hot Disk-Halo Interface Below the Perseus Spiral Arm
Ananya Goon Tuli, Nicolas Lehner, J. Christopher Howk +3
The Milky Way's disk-halo interface mediates energy and mass exchange between the interstellar thin disk and the halo. In the first detailed study of the Perseus arm's disk-halo in…
The Truncated Circumgalactic Medium of the Large Magellanic Cloud
Sapna Mishra, Andrew J. Fox, Dhanesh Krishnarao +6
The Large Magellanic Cloud (LMC) is the nearest massive galaxy to the Milky Way. Its circumgalactic medium is complex and multi-phase, containing both stripped HI structures like t…
Detection of Dust in High-Velocity Cloud Complex C -- Enriched Gas Accreting onto the Milky Way
Andrew J. Fox, Frances H. Cashman, Gerard A. Kriss +4
We present the detection of dust depletion in Complex C, a massive, infalling, low-metallicity high-velocity cloud in the northern Galactic hemisphere that traces the ongoing accre…
Caught in the Act: A Metal-Rich High-Velocity Cloud in the Inner Galaxy
Frances H. Cashman, Andrew J. Fox, Bart P. Wakker +8
We characterize the chemical and physical conditions in an outflowing high-velocity cloud in the inner Galaxy. We report a super-solar metallicity of [O/H] = for the…
Observations of a Magellanic Corona
Dhanesh Krishnarao, Andrew J. Fox, Elena D'Onghia +6
The Large and Small Magellanic Clouds (LMC/SMC) are the closest major satellite galaxies of the Milky Way. They are likely on their first passage on an infalling orbit towards our…
Diverse metallicities of Fermi bubble clouds indicate dual origins in the disk and halo
Trisha Ashley, Andrew J. Fox, Frances H. Cashman +5
The Galactic Center is surrounded by two giant plasma lobes known as the Fermi Bubbles, extending ~10 kpc both above and below the Galactic plane. Spectroscopic observations of Fer…
Molecular Gas within the Milky Way's Nuclear Wind
Frances H. Cashman, Andrew J. Fox, Blair D. Savage +9
We report the first direct detection of molecular hydrogen associated with the Galactic nuclear wind. The Far-Ultraviolet Spectroscopic Explorer spectrum of LS 4825, a B1 Ib-II sta…
Significant H I and Metal Differences around the z = 0.83 Lens Galaxy Towards the Doubly Lensed Quasar SBS 0909+532
Frances H. Cashman, Varsha P. Kulkarni, Sebastian Lopez
We report a large difference in neutral hydrogen (H I) and metal column densities between the two sight lines probing opposite sides of the lensing galaxy at = 0.…
Probing Structure in Cold Gas at with Gravitationally Lensed Quasar Sight Lines
Varsha P. Kulkarni, Frances H. Cashman, Sebastian Lopez +3
Absorption spectroscopy of gravitationally lensed quasars (GLQs) enables study of spatial variations in the interstellar and/or circumgalactic medium of foreground galaxies. We rep…
Metal-enriched Galaxies in the First ~1 Billion Years: Evidence of a Smooth Metallicity Evolution at z ~ 5
Suraj Poudel, Varsha P. Kulkarni, Frances H. Cashman +4
We present seven new abundance measurements of the elements O, C and Si at z > 4.5, doubling the existing sample of weakly depleted elements in gas-rich galaxies, in order to const…
Atomic Data Revisions for Transitions Relevant to Observations of Interstellar, Circumgalactic, and Intergalactic Matter
Frances H. Cashman, Varsha P. Kulkarni, Romas Kisielius +2
Measurements of element abundances in galaxies from astrophysical spectroscopy depend sensitively on the atomic data used. With the goal of making the latest atomic data accessible…