PMO OpenIR  > 宇宙伽马暴、中子星及相关物理研究团组
Dust extinction of gamma-ray burst host galaxies: Identification of two classes?
Chen, S. L.; Li, Aigen; Wei, D. M.
2006-08-10
Source PublicationASTROPHYSICAL JOURNAL
ISSN0004-637X
Volume647Issue:1Pages:L13-L16
AbstractDust in the host galaxies of gamma-ray bursts (GRBs) dims and reddens their afterglow spectra. Knowledge of the nature of this dust is crucial for correcting for extinction, providing clues to the nature of GRB progenitors, and probing the interstellar medium of high-redshift galaxies as well as the nature of cosmic dust when the universe was much younger and galaxies were much less evolved. The dust and extinction properties of GRB host galaxies are still poorly known. Unlike previous work, we derive in this Letter the extinction curves for 10 GRB host galaxies without a priori assumption of any specific extinction types ( such as those of the Milky Way or Small/Large Magellanic Clouds). It is found that there appear to exist two different types of extinction curves: one is relatively flat and gray, and the other displays a steeper dependence on inverse wavelength, closely resembling that of the Milky Way but with the 2175 angstrom feature removed.
KeywordDust, Extinction Gamma Rays : Bursts
Subject AreaAstronomy & Astrophysics
WOS HeadingsScience & Technology ; Physical Sciences
WOS KeywordSMALL-MAGELLANIC-CLOUD ; HIGH COLUMN DENSITY ; LINE-OF-SIGHT ; INFRARED-EMISSION ; INTERSTELLAR DUST ; AFTERGLOW ; ULTRAVIOLET ; DISTRIBUTIONS ; GRB-980703 ; STELLAR
Indexed BySCI
Language英语
WOS Research AreaAstronomy & Astrophysics
WOS SubjectAstronomy & Astrophysics
WOS IDWOS:000239648000004
Citation statistics
Cited Times:32[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://libir.pmo.ac.cn/handle/332002/3632
Collection宇宙伽马暴、中子星及相关物理研究团组
Affiliation1.Chinese Acad Sci, Purple Mt Observ, Nanjing 210008, Peoples R China
2.Univ Missouri, Dept Phys & Astron, Columbia, MO 65211 USA
3.Nanjing Univ, Joint Ctr Particle Nucl Phys & Cosmol Purple Mt O, Nanjing 210008, Peoples R China
Recommended Citation
GB/T 7714
Chen, S. L.,Li, Aigen,Wei, D. M.. Dust extinction of gamma-ray burst host galaxies: Identification of two classes?[J]. ASTROPHYSICAL JOURNAL,2006,647(1):L13-L16.
APA Chen, S. L.,Li, Aigen,&Wei, D. M..(2006).Dust extinction of gamma-ray burst host galaxies: Identification of two classes?.ASTROPHYSICAL JOURNAL,647(1),L13-L16.
MLA Chen, S. L.,et al."Dust extinction of gamma-ray burst host galaxies: Identification of two classes?".ASTROPHYSICAL JOURNAL 647.1(2006):L13-L16.
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