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Evidence for rapidly spinning black holes in quasars
Wang JM(王建民); Chen YM(陈燕梅); Wang, JM; Chen, YM; Ho, LC; McLure, RJ
2006
发表期刊ASTROPHYSICAL JOURNAL
卷号642期号:2页码:L111-L114
通讯作者Chinese Acad Sci, Key Lab Particle Astrophys, Inst High Energy Phys, Beijing 100049, Peoples R China ; Chinese Acad Sci, Grad Sch, Beijing 100049, Peoples R China ; Observ Carnegie Inst Washington, Pasadena, CA 91101 USA ; Univ Edinburgh, Royal Observ, Inst Astron, Edinburgh EH9 3HJ, Midlothian, Scotland
摘要It has long been believed that accretion onto supermassive black holes powers quasars, but there are still relatively few observational constraints on the spins of the black holes. We address this problem by estimating the average radiative efficiencies of a large sample of quasars selected from the Sloan Digital Sky Survey, by combining their luminosity function and their black hole mass function. Over the redshift interval 0.4 < z < 2.1, we find that quasars have average radiative efficiencies of similar to 30%-35%, strongly suggesting that their black holes are rotating very rapidly, with specific angular momentum a similar to 1, a value that remains roughly constant with redshift. The average radiative efficiency could be reduced by a factor of similar to 2, depending on the adopted zero point for the black hole mass scale. The inferred large spins and their lack of significant evolution are in agreement with the predictions of recent semianalytical models of hierarchical galaxy formation if black holes gain most of their mass through accretion.
文章类型Article
关键词black hole physics quasars : general
学科领域Astronomy & Astrophysics
研究领域[WOS]Astronomy & Astrophysics
DOI10.1086/504842
URL查看原文
语种英语
WOS类目Astronomy & Astrophysics
WOS记录号WOS:000237554300007
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被引频次:61[WOS]   [WOS记录]     [WOS相关记录]
文献类型期刊论文
条目标识符http://ir.ihep.ac.cn/handle/311005/240241
专题粒子天体物理中心
作者单位中国科学院高能物理研究所
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Wang JM,Chen YM,Wang, JM,et al. Evidence for rapidly spinning black holes in quasars[J]. ASTROPHYSICAL JOURNAL,2006,642(2):L111-L114.
APA 王建民,陈燕梅,Wang, JM,Chen, YM,Ho, LC,&McLure, RJ.(2006).Evidence for rapidly spinning black holes in quasars.ASTROPHYSICAL JOURNAL,642(2),L111-L114.
MLA 王建民,et al."Evidence for rapidly spinning black holes in quasars".ASTROPHYSICAL JOURNAL 642.2(2006):L111-L114.
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