EVOLUTION OF WARPED ACCRETION DISKS IN ACTIVE GALACTIC NUCLEI. I. ROLES OF FEEDING AT THE OUTER BOUNDARIES

CORC > 高能物理研究所 > 中国科学院高能物理研究所 > 粒子天体物理中心

	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
刊名	ASTROPHYSICAL JOURNAL
	2013
卷号	764 期号:1 页码:16
关键词	accretion black hole physics galaxies: active accretion disks
英文摘要	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.
学科主题	Astronomy & Astrophysics
收录类别	SCI
WOS记录号	WOS:000314335200016
公开日期	2016-05-03
内容类型	期刊论文
源URL	[http://ir.ihep.ac.cn/handle/311005/224382]
专题	高能物理研究所_粒子天体物理中心
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.
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.