171 citations · 2.8k across the 115 of their papers we have counts for
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Silicon and iron dust in gamma-ray burst host galaxy absorbers
T. Zafar, K. E. Heintz, A. Karakas +8
Depletion studies provide a way to understand the chemical composition of interstellar dust grains. We here examine 23 gamma-ray bursts (GRB) optical afterglow spectra (spanning 0.…
New constraints on the physical conditions in H-bearing GRB-host damped Lyman- absorbers
K. E. Heintz, J. Bolmer, C. Ledoux +25
We report the detections of molecular hydrogen (H), vibrationally-excited H (H), and neutral atomic carbon (CI), in two new afterglow spectra of GRBs\,181020A ($z=2.9…
Spectral Energy Distributions of Candidate Periodically-Variable Quasars: Testing the Binary Black Hole Hypothesis
Hengxiao Guo, Xin Liu, Zafar Tayyaba +1
Periodic quasars are candidates for binary supermassive black holes (BSBHs) efficiently emitting low frequency gravitational waves. Recently, 150 candidates were identified f…
On the dust properties of high redshift molecular clouds and the connection to the 2175 Å extinction bump
K. E. Heintz, T. Zafar, A. De Cia +9
We present a study of the extinction and depletion-derived dust properties of gamma-ray burst (GRB) absorbers at showing the presence of neutral carbon (\ion{C}{I}). By mod…