321 citations · 6.3k across the 122 of their papers we have counts for
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Extraplanar Dust: a Tracer of Cold Dense Gas in the Thick Disks of Spiral Galaxies
J. Christopher Howk
The interstellar thick disks of galaxies contain not only gas, but significant quantities of dust. Most of our knowledge of extraplanar dust in disk galaxies comes from direct broa…
Elemental Abundances in Two High Column Density Damped Lyman Alpha Systems at z < 1.5
Sandhya M. Rao, Jason X. Prochaska, J. Christopher Howk +1
We present Keck/HIRES abundance measurements and metal-line kinematic profiles of the damped Lyman alpha systems (DLAs) towards the quasars Q0933+733 (z_abs=1.479) and Q0948+433 (z…
Small-Scale Structure of O VI Interstellar Gas in the Direction of the Globular Cluster NGC 6752
N. Lehner, J. C. Howk
In order to study the small-scale structure of the hot interstellar gas, we obtained Far Ultraviolet Spectroscopic Explorer interstellar O VI interstellar absorption spectra of 4 f…
Probing the IGM/Galaxy Connection Toward PKS0405-123 I: UV Spectroscopy and Metal-Line Systems
Jason X. Prochaska, Hsiao-Wen Chen, J. Christopher Howk +2
We present results from an analysis of FUSE and HST/STIS spectroscopy of the z_em=0.57 quasar PKS0405-123. We focus on the intervening metal-line systems identified along the sight…
Cold Neutral Gas in a z=4.2 Damped Lyman-alpha System: The Fuel for Star Formation
J. Christopher Howk, Arthur M. Wolfe, Jason X. Prochaska
We discuss interstellar temperature determinations using the excitation equilibrium of the ^2P levels of Si II and C II. We show how observations of the ^2P_3/2 fine structure leve…