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Directly imaging damped Ly-alpha galaxies at z>2. III: The star formation rates of neutral gas reservoirs at z~2.7
Michele Fumagalli, John M. O'Meara, J. Xavier Prochaska +2
We present results from a survey designed to probe the star formation properties of 32 damped Ly-alpha systems (DLAs) at z~2.7. By using the "double-DLA" technique that eliminates…
Directly imaging damped Ly-alpha galaxies at z>2. II: Imaging and spectroscopic observations of 32 quasar fields
Michele Fumagalli, John M. O'Meara, J. Xavier Prochaska +2
Damped Ly-alpha absorbers (DLAs) are a well-studied class of absorption line systems, and yet the properties of their host galaxies remain largely unknown. To investigate the origi…
The COS-Halos Survey: Physical Conditions and Baryonic Mass in the Low-Redshift Circumgalactic Medium
Jessica K. Werk, J. Xavier Prochaska, Jason Tumlinson +13
We analyze the physical conditions of the cool, photoionized (T K) circumgalactic medium (CGM) using the COS-Halos suite of gas column density measurements for 44 gaseo…
The Giant Gemini GMOS survey of z>4.4 quasars - I. Measuring the mean free path across cosmic time
Gábor Worseck, J. Xavier Prochaska, John M. O'Meara +7
We have obtained spectra of 163 quasars at with the Gemini Multi Object Spectrometers on the Gemini North and South telescopes, the largest publicly available s…
HST/COS Detection of Deuterated Molecular Hydrogen in a DLA at z = 0.18
Cristina M. Oliveira, Kenneth R. Sembach, Jason Tumlinson +2
We report on the detection of deuterated molecular hydrogen, HD, at . HD and H are detected in HST/COS data of a low metallicity () damped L…
Galactic and Circumgalactic OVI and its Impact on the Cosmological Metal and Baryon Budgets at 2<z<3.5
Nicolas Lehner, John M. O'Meara, Andrew J. Fox +4
We present the first results from our NASA Keck Observatory Database of Ionized Absorbers toward Quasars (KODIAQ) survey which aims to characterize the properties of the highly ion…