DETECTION OF A SUPERSTRONG 2175 angstrom ABSORPTION GALAXY AT z=0.8839 TOWARD THE QUASAR SDSS J100713.68+285348.4

doi:10.1088/0004-637X/708/1/742

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	DETECTION OF A SUPERSTRONG 2175 angstrom ABSORPTION GALAXY AT z=0.8839 TOWARD THE QUASAR SDSS J100713.68+285348.4
	Zhou, HY 1,2,3,4; Ge, J 3; Lu, HL 1,2; Wang, TG 1; Yuan WM(袁为民)5 ; Jiang, P 1,3; Dan HG(单红光)5 ; Zhou, HY (reprint author), Univ Sci & Technol China, Chinese Acad Sci, Key Lab Res Galaxies & Cosmol, Hefei 230026, Anhui, Peoples R China.
发表期刊	ASTROPHYSICAL JOURNAL
	2010
卷号	708 期号:1 页码:742-749
DOI	10.1088/0004-637X/708/1/742
产权排序	第5完成单位
收录类别	SCI
关键词	Quasars: Absorption Lines Dust Quasars: Individual (Sdss j1007+2853) Extinction
摘要	We report a superstrong 2175 angstrom absorption galaxy at a redshift of z(G) = 0.8839 toward the background quasar SDSS J100713.68+285348.4 at z(Q) = 1.047 identified from the Sloan Digital Sky Survey (SDSS) data. The bump is the strongest ever known, about 2.5 times the average in the Galactic interstellar extinction curves. About two dozens of narrow absorption lines are identified in this system in the SDSS and the follow-up Multiple Mirror Telescope (MMT) spectra, including Zn II, Cr II, Mn II, Si II, Fe II, Ti II, Ca II, Al III, Mg II, and Mg I. We have derived accurate measurements of the gas-phase column densities of most of these ions through their weak absorption lines. The combination of unprecedentedly strong 2175 angstrom absorption bump strength with the measured zinc column density suggests that carbon is likely to be the main carrier of the 2175 angstrom absorber assuming that the total abundance of the absorber relative to zinc is similar to the solar values and zinc is not heavily depleted onto dust grains. Under the same assumption, we found that dust depletion in this absorption galaxy is much less than that in the Milky Way, indicating possible different nucleosynthesis and/or chemical and interstellar medium evolution history.
项目资助者	NSF [AST-0451407, AST-0451408, NSF-10533050] ; NASA [NNG05G321G, NNG05GR41G] ; University of Florida ; Alexander von Humboldt Foundation ; program 973 [2007CB815405] ; Alfred P. Sloan Foundation ; US Department of Energy ; Japanese Monbukagakusho ; Max Planck Society ; Higher Education Funding Council for England
语种	英语
学科领域	Astronomy & Astrophysics
文章类型	Article
ISSN	0004-637X
URL	查看原文
WOS记录号	WOS:000272790400063
WOS研究方向	Astronomy & Astrophysics
WOS类目	Astronomy & Astrophysics
关键词[WOS]	DIGITAL SKY SURVEY ; ULTRAVIOLET EXTINCTION CURVES ; RHO-OPHIUCHI CLOUD ; DUST FEATURE ; INTERSTELLAR EXTINCTION ; SHAPES ; SYSTEMS ; DEPLETIONS ; ABUNDANCES ; SPECTRA
引用统计	被引频次：31[WOS] [WOS记录] [WOS相关记录]
文献类型	期刊论文
条目标识符	http://ir.ynao.ac.cn/handle/114a53/5000
专题	高能天体物理研究组
通讯作者	Zhou, HY (reprint author), Univ Sci & Technol China, Chinese Acad Sci, Key Lab Res Galaxies & Cosmol, Hefei 230026, Anhui, Peoples R China.
作者单位	1.Key Laboratory for Research in Galaxies and Cosmology, The University of Sciences and Technology of China, Chinese Academy of Sciences, Hefei, Anhui 230026, China 2.Max-Planck-Institut für extraterrestrische Physik, Postfach 1312, 85741 Garching, Germany 3.Department of Astronomy, University of Florida, Gainesville, FL 32611, USA 4.Center for Astrophysics, University of Science and Technology of China, Hefei, Anhui 230026, China 5.National Astronomical Observatories/Yunnan Observatory, Chinese Academy of Sciences, Kunming, Yunnan 650011, China
推荐引用方式 GB/T 7714	Zhou, HY,Ge, J,Lu, HL,et al. DETECTION OF A SUPERSTRONG 2175 angstrom ABSORPTION GALAXY AT z=0.8839 TOWARD THE QUASAR SDSS J100713.68+285348.4[J]. ASTROPHYSICAL JOURNAL,2010,708(1):742-749.
APA	Zhou, HY.,Ge, J.,Lu, HL.,Wang, TG.,Yuan WM.,...&Zhou, HY .(2010).DETECTION OF A SUPERSTRONG 2175 angstrom ABSORPTION GALAXY AT z=0.8839 TOWARD THE QUASAR SDSS J100713.68+285348.4.ASTROPHYSICAL JOURNAL,708(1),742-749.
MLA	Zhou, HY,et al."DETECTION OF A SUPERSTRONG 2175 angstrom ABSORPTION GALAXY AT z=0.8839 TOWARD THE QUASAR SDSS J100713.68+285348.4".ASTROPHYSICAL JOURNAL 708.1(2010):742-749.

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