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The Circumgalactic Medium
Jason Tumlinson, Molly S. Peeples, Jessica K. Werk
The gas surrounding galaxies outside their disks or interstellar medium and inside their virial radii is known as the circumgalactic medium (CGM). In recent years this component of…
The Second Data Release of the KODIAQ Survey
John M. O'Meara, Nicolas Lehner, J. Christopher Howk +5
We present and make publicly available the second data release (DR2) of the Keck Observatory Database of Ionized Absorption toward Quasars (KODIAQ) survey. KODIAQ DR2 consists of a…
Project AMIGA: A Minimal Covering Factor for Optically Thick Circumgalactic Gas Around the Andromeda Galaxy
J. Christopher Howk, Christopher B. Wotta, Michelle A. Berg +19
We present a deep search for HI 21-cm emission from the gaseous halo of Messier 31 as part of Project AMIGA, a large program Hubble Space Telescope program to study the circumgalac…
The COS-Halos Survey: Metallicities in the Low-Redshift Circumgalactic Medium
J. Xavier Prochaska, Jessica K. Werk, Gabor Worseck +8
We analyze new far-ultraviolet spectra of 13 quasars from the z~0.2 COS-Halos survey that cover the HI Lyman limit of 14 circumgalactic medium (CGM) systems. These data yield preci…