1.2k citations · 2.2k across the 16 of their papers we have counts for
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High-Redshift Starbursting Dwarf Galaxies Revealed by GRB Afterglows
Hsiao-Wen Chen, Daniel A. Perley, Lindsey K. Pollack +7
We present a study of 15 long-duration gamma-ray burst (GRB) host galaxies at z>2. The GRBs are selected with available early-time afterglow spectra in order to compare interstella…
A New Constraint on the Escape Fraction in Distant Galaxies Using Gamma-ray Burst Afterglow Spectroscopy
Hsiao-Wen Chen, Jason X. Prochaska, Nickolay Y. Gnedin
We describe a new method to measure the escape fraction fesc of ionizing radiation from distant star-forming galaxies using the afterglow spectra of long-duration gamma-ray bursts…
On the absence of Wind Signatures in GRB Afterglow Spectra: Constraints on the Wolf-Rayet Winds of GRB Progenitors
Hsiao-Wen Chen, Jason X. Prochaska, Enrico Ramirez-Ruiz +3
We investigate available constraints on the circumstellar medium (CSM) around long-duration gamma-ray burst (GRB) progenitors from afterglow spectra. We first establish a statistic…
Temporal Variation in Excited Fe^+ Near a GRB Afterglow
Miroslava Dessauges-Zavadsky, Hsiao-Wen Chen, Jason X. Prochaska +2
Excited Si^+ and Fe^+ species are routinely observed in the host environment of gamma-ray burst (GRB) afterglows, but are not commonly seen in other extragalactic locations. Their…
Echelle Spectroscopy of a GRB Afterglow at z=3.969: A New Probe of the Interstellar and Intergalactic Media in the Young Universe
Hsiao-Wen Chen, Jason X. Prochaska, Joshua S. Bloom +1
We present an echelle spectrum of the Swift GRB 050730, obtained four hours after the burst using the MIKE spectrograph on the Magellan Clay Telescope when the afterglow was at R=1…
On the Incidence and Kinematics of Strong Mg II Absorbers
Gabriel E. Prochter, Jason X. Prochaska, Scott Burles
We present the results of two investigations into the nature of strong (rest equivalent width > 1.0 Ang) Mg II absorption systems at high redshift. The first line of questioning ex…