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EVOLUTION OF WARPED ACCRETION DISKS IN ACTIVE GALACTIC NUCLEI. I. ROLES OF FEEDING AT THE OUTER BOUNDARIES
Li YR(李彦荣); Wang JM(王建民); Cheng C(程诚); 邱捷;Li, YR; Wang, JM; Cheng, C; Qiu, J
2013
发表期刊ASTROPHYSICAL JOURNAL
卷号764期号:1页码:16
摘要We investigate the alignment processes of spinning black holes and their surrounding warped accretion disks in a frame of two different types of feeding at the outer boundaries. We consider (1) fixed flows in which gas is continually fed with a preferred angular momentum, and (2) free flows in which there is no gas supply and the disks diffuse freely at their outer edges. As expected, we find that for the cases of fixed flows the black hole disk systems always align on timescales of several 10(6) yr, irrespective of the initial inclinations. If the initial inclination angles are larger than pi/2, the black hole accretion transits from retrograde to prograde fashion, and the accreted mass onto the black holes during these two phases is comparable. On the other hand, for the cases of free flows, both alignments and anti-alignments can occur, depending on the initial inclinations and the ratios of the angular momentum of the disks to that of the black holes. In such cases, the disks will be consumed within timescales of 10(6) yr by black holes accreting at the Eddington limit. We propose that there is a close connection between the black hole spin and the lifetime for which the feeding persists, which determines the observable episodic lifetimes of active galactic nuclei. We conclude that careful inclusion of the disk feeding at the outer boundaries is crucial for modeling the evolution of the black hole spin.
关键词accretion, accretion disks black hole physics galaxies: active
学科领域Astronomy & Astrophysics
DOI10.1088/0004-637X/764/1/16
收录类别SCI
WOS记录号WOS:000314335200016
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被引频次:2[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/311005/224382
专题粒子天体物理中心
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Li YR,Wang JM,Cheng C,et al. EVOLUTION OF WARPED ACCRETION DISKS IN ACTIVE GALACTIC NUCLEI. I. ROLES OF FEEDING AT THE OUTER BOUNDARIES[J]. ASTROPHYSICAL JOURNAL,2013,764(1):16.
APA 李彦荣.,王建民.,程诚.,邱捷;Li, YR.,Wang, JM.,...&Qiu, J.(2013).EVOLUTION OF WARPED ACCRETION DISKS IN ACTIVE GALACTIC NUCLEI. I. ROLES OF FEEDING AT THE OUTER BOUNDARIES.ASTROPHYSICAL JOURNAL,764(1),16.
MLA 李彦荣,et al."EVOLUTION OF WARPED ACCRETION DISKS IN ACTIVE GALACTIC NUCLEI. I. ROLES OF FEEDING AT THE OUTER BOUNDARIES".ASTROPHYSICAL JOURNAL 764.1(2013):16.
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