J Xavier Prochaska

Observing Colocated Neutral and Ionized Gas-phase Iron Depletion in the Magellanic Clouds

Abstract Depletion is the observed phenomenon where gas-phase elemental abundances are reduced through accretion onto dust grains. We measure neutral gas-phase elemental abundances (S, Fe) in the Magellanic Clouds along 33 sightlines using high-resolution UV spectroscopy (Hubble...

Unveiling Hidden Lyman Alpha Emitters in the DESI DR1 Data

Abstract We present an automatic method based on machine learning convolutional neural network (CNN) architecture to detect Ly α emitters (LAEs) hidden in the Data Release 1 spectroscopic data set of the Dark Energy Spectroscopic Instrument (DESI). Those LAEs mostly have incorrec...

The KAGG Survey: KCWI Analysis of Gas around Galaxies at z ≈ 3–5

Abstract We present the KCWI Analysis of Gas around Galaxies (KAGG) survey of Ly α emission around damped Ly α absorbers (DLAs) at z ≈ 3–5 with the Keck Cosmic Web Imager (KCWI) integral-field spectrograph. The KAGG survey is characterized by the sample of 36 DLAs spanning a wide...