| 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
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| 2013
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| 发表期刊 | ASTROPHYSICAL JOURNAL
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| 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
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| 学科领域 | Astronomy & Astrophysics
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| DOI | 10.1088/0004-637X/764/1/16
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| 收录类别 | SCI
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| WOS记录号 | WOS:000314335200016
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| 引用统计 |
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| 文献类型 | 期刊论文
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| 条目标识符 | http://ir.ihep.ac.cn/handle/311005/224382
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| 专题 | 粒子天体物理中心
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推荐引用方式
GB/T 7714 |
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.
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| 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.
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| 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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