The host galaxies of gamma-ray bursts. I. Interstellar medium properties of ten nearby long-duration gamma-ray burst hosts

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dc.contributor.authorLevesque, E. M.
dc.contributor.authorBerger, Edo
dc.contributor.authorKewley, Lisa
dc.contributor.authorBagley, Megan M.
dc.date.accessioned2015-12-13T22:43:09Z
dc.date.issued2010
dc.date.updated2016-02-24T09:36:05Z
dc.description.abstractWe present the first observations from a large-scale survey of nearby (z < 1) long-duration gamma-ray burst (LGRB) host galaxies, which consist of eight rest-frame optical spectra obtained at Keck and Magellan. Along with two host galaxy observations from the literature, we use optical emission-line diagnostics to determine metallicities, ionization parameters, young stellar population ages, and star formation rates. We compare the LGRB host environments to a variety of local and intermediate-redshift galaxy populations, as well as the newest grid of stellar population synthesis and photoionization models generated with the Starburst99/Mappings codes. With these comparisons, we investigate whether the GRB host galaxies are consistent with the properties of the general galaxy population, and therefore whether they may be used as reliable tracers of star formation. Despite the limitations inherent in our small sample, we find strong evidence that LGRB host galaxies generally have low-metallicity interstellar medium (ISM) environments out to z ∼ 1. The ISM properties of our GRB hosts, including metallicity and ionization parameter, are significantly different from the general galaxy population and host galaxies of nearby broad-lined Type Ic supernovae. However, these properties show better agreement with a sample of nearby metal-poor galaxies.
dc.identifier.issn0004-6256
dc.identifier.urihttp://hdl.handle.net/1885/79076
dc.publisherUniversity of Chicago Press
dc.sourceAstronomical Journal
dc.subjectKeywords: Galaxies: ISM; Gamma rays: bursts
dc.titleThe host galaxies of gamma-ray bursts. I. Interstellar medium properties of ten nearby long-duration gamma-ray burst hosts
dc.typeJournal article
local.bibliographicCitation.issue2
local.bibliographicCitation.lastpage711
local.bibliographicCitation.startpage694
local.contributor.affiliationLevesque, E M, University of Hawaii
local.contributor.affiliationBerger, Edo, Smithsonian Astrophysical Observatory
local.contributor.affiliationKewley, Lisa, College of Physical and Mathematical Sciences, ANU
local.contributor.affiliationBagley, Megan M, University of Wyoming
local.contributor.authoremailu9415124@anu.edu.au
local.contributor.authoruidKewley, Lisa, u9415124
local.description.embargo2037-12-31
local.description.notesImported from ARIES
local.identifier.absfor020103 - Cosmology and Extragalactic Astronomy
local.identifier.ariespublicationf5625xPUB7605
local.identifier.citationvolume139
local.identifier.doi10.1088/0004-6256/139/2/694
local.identifier.scopusID2-s2.0-74849085878
local.identifier.uidSubmittedByf5625
local.type.statusPublished Version

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