A Caltech Library Service

Elemental Abundances in GRB Afterglows and High‐Redshift DLAs

Penprase, Bryan E. and Sargent, Wallace L. W. and Martinez, Irene Toro and Prochaska, Jason X. and Beeler, Daniel Jay (2008) Elemental Abundances in GRB Afterglows and High‐Redshift DLAs. In: First Stars III. AIP Conference Proceedings. No.990. American Institute of Physics , Melville, NY, pp. 499-503. ISBN 978-0-7354-0509-7.

[img] PDF - Published Version
See Usage Policy.


Use this Persistent URL to link to this item:


We present the results of a survey of GRB afterglows and DLA absorption line systems, in which we compare the abundances of elements from the absorbers with surveys of stars, and previous work. Our results detect high metallicity systems within GRB afterglow absorption, consistent with galactic disks having high rates of star formation and enrichment of heavy elements. We also detect some of the lowest metallicity systems yet found in DLA absorption lines, with many values of [X/H]<−2.8, including one system which has metallicity of [C/H] and [O/H} of approximately −3.5. The low metallicity DLA systems are useful for constraining nucleosynthesis from the first Pop III stars, and we compare our results with one nucleosynthesis model. Finally we describe some preliminary results from a survey of OVI absorbers within quasar Lyman alpha forest spectra, and the evidence within these spectra for low‐metallicity IGM.

Item Type:Book Section
Related URLs:
URLURL TypeDescription
Prochaska, Jason X.0000-0002-7738-6875
Additional Information:© 2008 American Institute of Physics. Published online 11 March 2008. We would like to acknowledge the support of the Pomona College SURP program for ITM. Funding from the NSF grant to Wallace Sargent supported BEP for some of the analysis within this work. BEP would like to acknowledge support from the Pomona College travel grant to BEP, ITM, and DB to support the observations at the Keck telescope.
Funding AgencyGrant Number
Subject Keywords:Absorption Lines, Quasars, Gamma Ray Bursts
Series Name:AIP Conference Proceedings
Issue or Number:990
Classification Code:PACS: 95.54.Aj, 98.62.Ra
Record Number:CaltechAUTHORS:20160505-074821313
Persistent URL:
Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:66670
Deposited By: Ruth Sustaita
Deposited On:05 May 2016 22:47
Last Modified:02 Mar 2023 22:44

Repository Staff Only: item control page