Dust extinction of gamma-ray burst host galaxies: Identification of two classes?

CORC > 紫金山天文台 > 中国科学院紫金山天文台 > 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.
刊名	ASTROPHYSICAL JOURNAL
	2006-08-10
卷号	647 期号:1 页码:L13-L16
关键词	dust, extinction gamma rays : bursts
ISSN号	0004-637X
英文摘要	Dust 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.
学科主题	Astronomy & Astrophysics
WOS标题词	Science & Technology ; Physical Sciences
类目[WOS]	Astronomy & Astrophysics
研究领域[WOS]	Astronomy & Astrophysics
关键词[WOS]	SMALL-MAGELLANIC-CLOUD ; HIGH COLUMN DENSITY ; LINE-OF-SIGHT ; INFRARED-EMISSION ; INTERSTELLAR DUST ; AFTERGLOW ; ULTRAVIOLET ; DISTRIBUTIONS ; GRB-980703 ; STELLAR
收录类别	SCI
语种	英语
WOS记录号	WOS:000239648000004
公开日期	2012-02-07
内容类型	期刊论文
源URL	[http://159.226.72.40/handle/332002/3632]
专题	紫金山天文台_宇宙伽马暴、中子星及相关物理研究团组
作者单位	1.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
推荐引用方式 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.