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Early growth of massive black holes in quasars
Wang JM(王建民); Chen YM(陈燕梅); Yan CS(闫昌硕); Hu C(胡晨); Wang, JM; Chen, YM; Yan, CS; Hu, C
2008
发表期刊ASTROPHYSICAL JOURNAL LETTERS
卷号673期号:1页码:L9-L12
通讯作者[Wang, Jian-Min ; Chen, Yan-Mei ; Yan, Chang-Shuo ; Hu, Chen] Chinese Acad Sci, Inst High Energy Phys, Key Lab Particle Astrophys, Beijing 100049, Peoples R China ; [Chen, Yan-Mei ; Yan, Chang-Shuo ; Hu, Chen] Chinese Acad Sci, Grad Sch, Beijing 100049, Peoples R China ; [Hu, Chen] Chinese Acad Sci, Natl Astron Observ, Beijing 100012, Peoples R China
文章类型Article
摘要Episodic activity of quasars is driving growth of supermassive black holes (SMBHs) via accretion of baryon gas. In this Letter, we develop a simple method to analyze the duty cycle of quasars up to the redshift z similar to 6 universe from luminosity functions (LFs). We find that the duty cycle below redshift z similar to 2 follows the cosmic history of star formation rate ( SFR) density. Beyond z similar to 2, the evolutionary trends of the duty cycle are opposite to that of the cosmic SFR density history, implying the role of feedback from black hole activity. With the duty cycle, we get the net lifetime of quasars (z less than or similar to 5) about similar to 10(9) yr. Based on the local SMBHs, the mean mass of SMBHs is obtained at any redshifts and their seeds are of 10(5) M-circle dot at the reionization epoch (z(re)) of the universe through the conservation of black hole number density in a comoving frame. We find that primordial black holes (similar to 10(3) M-circle dot) are able to grow up to the seeds via a moderate super-Eddington accretion of similar to 30 times the critical rate from z = 24 to z(re). Highly super-Eddington accretion onto the primordial black holes is not necessary.
关键词black hole physics galaxies : active galaxies : evolution galaxies : nuclei quasars : general
学科领域Astronomy & Astrophysics
研究领域[WOS]Astronomy & Astrophysics ; Astronomy & Astrophysics
DOI10.1086/527471
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:000255232800003
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被引频次:17[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/311005/240306
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
推荐引用方式
GB/T 7714
Wang JM,Chen YM,Yan CS,et al. Early growth of massive black holes in quasars[J]. ASTROPHYSICAL JOURNAL LETTERS,2008,673(1):L9-L12.
APA 王建民.,陈燕梅.,闫昌硕.,胡晨.,Wang, JM.,...&Hu, C.(2008).Early growth of massive black holes in quasars.ASTROPHYSICAL JOURNAL LETTERS,673(1),L9-L12.
MLA 王建民,et al."Early growth of massive black holes in quasars".ASTROPHYSICAL JOURNAL LETTERS 673.1(2008):L9-L12.
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