IHEP OpenIR  > 粒子天体物理中心
EPISODIC RANDOM ACCRETION AND THE COSMOLOGICAL EVOLUTION OF SUPERMASSIVE BLACK HOLE SPINS
Wang JM(王建民); Hu C(胡晨); Li YR(李彦荣); Chen YM(陈燕梅); Yan CS(闫昌硕); Zhang S(张澍); Wang, JM; Hu, C; Li, YR; Chen, YM; King, AR; Marconi, A; Ho, LC; Yan, CS; Staubert, R; Zhang, S
2009
发表期刊ASTROPHYSICAL JOURNAL LETTERS
卷号697期号:2页码:L141-L144
通讯作者[Wang, Jian-Min ; Hu, Chen ; Li, Yan-Rong ; Chen, Yan-Mei ; Yan, Chang-Shuo ; Zhang, Shu] Chinese Acad Sci, Inst High Energy Phys, Key Lab Particle Astrophys, Beijing 100049, Peoples R China ; [Wang, Jian-Min] Chinese Acad Sci, Ctr Theoret Phys, Sci Facil, Beijing 100049, Peoples R China ; [King, Andrew R.] Univ Leicester, Theoret Astrophys Grp, Leicester LE1 7RH, Leics, England ; [Marconi, Alessandro] Univ Florence, Dept Astron & Space Sci, I-50125 Florence, Italy ; [Ho, Luis C.] Observ Carnegie Inst Washington, Pasadena, CA 91101 USA ; [Staubert, Ruediger] Univ Tubingen, Abt Astron, IAAT, D-72076 Tubingen, Germany
文章类型Article
摘要The growth of supermassive black holes (BHs) located at the centers of their host galaxies comes mainly from the accretion of gas, but how to fuel them remains an outstanding unsolved problem in quasar evolution. This issue can be elucidated by quantifying the radiative efficiency parameter (eta) as a function of redshift, which also provides constraints on the average spin of the BHs and its possible evolution with time. We derive a formalism to link eta with the luminosity density, BH mass density, and duty cycle of quasars, quantities we can estimate from existing quasars, and galaxy survey data. We find that eta has a strong cosmological evolution: at z approximate to 2, eta approximate to 0.3, and by z approximate to 0 it has decreased by an order of magnitude, to eta approximate to 0.03. We interpret this trend as evolution in BH spin, and we appeal to episodic, random accretion as the mechanism for reducing the spin. The observation that the fraction of radio-loud quasars decreases with increasing redshift is inconsistent with the popular notion that BH spin is a critical factor for generating strong radio jets. In agreement with previous studies, we show that the derived history of BH accretion closely follows the cosmic history of star formation, consistent with other evidence that BHs and their host galaxies co-evolve.
关键词black hole physics galaxies: evolution quasars: general
学科领域Astronomy & Astrophysics
研究领域[WOS]Astronomy & Astrophysics ; Astronomy & Astrophysics
DOI10.1088/0004-637X/697/2/L141
URL查看原文
语种英语
研究领域[WOS]Astronomy & Astrophysics ; Astronomy & Astrophysics
WOS类目Astronomy & Astrophysics
WOS记录号WOS:000266073800016
引用统计
文献类型期刊论文
条目标识符http://ir.ihep.ac.cn/handle/311005/240249
专题粒子天体物理中心
实验物理中心
作者单位中国科学院高能物理研究所
推荐引用方式
GB/T 7714
Wang JM,Hu C,Li YR,et al. EPISODIC RANDOM ACCRETION AND THE COSMOLOGICAL EVOLUTION OF SUPERMASSIVE BLACK HOLE SPINS[J]. ASTROPHYSICAL JOURNAL LETTERS,2009,697(2):L141-L144.
APA 王建民.,胡晨.,李彦荣.,陈燕梅.,闫昌硕.,...&Zhang, S.(2009).EPISODIC RANDOM ACCRETION AND THE COSMOLOGICAL EVOLUTION OF SUPERMASSIVE BLACK HOLE SPINS.ASTROPHYSICAL JOURNAL LETTERS,697(2),L141-L144.
MLA 王建民,et al."EPISODIC RANDOM ACCRETION AND THE COSMOLOGICAL EVOLUTION OF SUPERMASSIVE BLACK HOLE SPINS".ASTROPHYSICAL JOURNAL LETTERS 697.2(2009):L141-L144.
条目包含的文件
文件名称/大小 文献类型 版本类型 开放类型 使用许可
7917.pdf(199KB)期刊论文作者接受稿限制开放CC BY-NC-SA请求全文
个性服务
推荐该条目
保存到收藏夹
查看访问统计
导出为Endnote文件
谷歌学术
谷歌学术中相似的文章
[王建民]的文章
[胡晨]的文章
[李彦荣]的文章
百度学术
百度学术中相似的文章
[王建民]的文章
[胡晨]的文章
[李彦荣]的文章
必应学术
必应学术中相似的文章
[王建民]的文章
[胡晨]的文章
[李彦荣]的文章
相关权益政策
暂无数据
收藏/分享
所有评论 (0)
暂无评论
 

除非特别说明,本系统中所有内容都受版权保护,并保留所有权利。