[-] Show simple item record

dc.contributor.authorLi, Y.eng
dc.contributor.authorLi, Aigeneng
dc.contributor.authorWei, D. M.eng
dc.date.issued2008eng
dc.descriptionhttp://link.aip.org/link/?APCPCS/1065/123/1 doi:10.1063/1.3027896eng
dc.description.abstractWe propose a straightforward method to determine the extinction of GRB host galaxies by comparing the observed optical spectra to the intrinsic ones extrapolated from the X-ray spectra. The derived extinction curves are gray and do not resemble any extinction curves of local galaxies. The amount of extinction is rather large. We model the derived extinction curves in terms of the silicate-graphite interstellar grain model and obtain the dust size distribution skewed to large grains. We determine, for the first time, the local dust-to-gas ratios of GRB host galaxies using the model-derived dust parameters and the hydrogen column densities determined from X-ray absorptions.eng
dc.description.sponsorshipD.M.W. is supported by the NSFC grants 10621303 and 10673034, and the National Basic Research Program of China (973 Program 2007CB815404). A.L. is supported in part by a NASA/Swift Theory Program, a NASA/Chandra Theory Program, and the NSFC Outstanding Oversea Young Scholarship.eng
dc.identifier.citationAIP Conf. Proc. -- October 22, 2008 -- Volume 1065, pp. 123-126eng
dc.identifier.issn0094-243Xeng
dc.identifier.urihttp://hdl.handle.net/10355/9111eng
dc.languageEnglisheng
dc.publisherAmerican Institute of Physicseng
dc.relation.ispartofcollectionUniversity of Missouri--Columbia. College of Arts and Sciences. Department of Physics and Astronomy. Physics and Astronomy publicationseng
dc.subject.lcshGamma ray sourceseng
dc.subject.lcshMagnetic fieldseng
dc.subject.lcshTelescopeseng
dc.subject.lcshGamma ray burstseng
dc.titleDetermining the Dust Extinction of Gamma-ray Burst Host Galaxies: A Direct Method Based on Optical and X-ray Photometryeng
dc.typeArticleeng


Files in this item

[PDF]

This item appears in the following Collection(s)

[-] Show simple item record