SUPERMASSIVE BLACK HOLES IN GALACTIC NUCLEI WITH TIDAL DISRUPTION OF STARS. II. AXISYMMETRIC NUCLEI

	SUPERMASSIVE BLACK HOLES IN GALACTIC NUCLEI WITH TIDAL DISRUPTION OF STARS. II. AXISYMMETRIC NUCLEI
	Zhong, Shiyan1,2 ; Berczik, Peter1,2,3,4 ; Spurzem, Rainer1,2,3,5,6
刊名	ASTROPHYSICAL JOURNAL
	2015-09-20
卷号	811 期号:1
关键词	galaxies: kinematics and dynamics galaxies: nuclei methods: numerical quasars: supermassive black holes stars: kinematics and dynamics
英文摘要	The tidal disruption (TD) of stars by supermassive central black holes from dense rotating star clusters is modeled by high-accuracy direct N-body simulations. As in a previous paper on spherical star clusters, we study the time evolution of the stellar tidal disruption rate and the origin of tidally disrupted stars, which are now accorded to several classes of orbits that only occur in axisymmetric systems (short-axis tube and saucer orbits). Compared with that in spherical systems, we found a higher TD rate in axisymmetric systems. The enhancement can be explained by an enlarged loss cone in phase space that stems from the fact that the total angular momentum J is not conserved. As in the case of spherical systems, the distribution of the last apocenter distance of tidally accreted stars peaks at the classical critical radius. However, the angular distribution of the origin of the accreted stars reveals interesting features. Inside the influence radius of the supermassive black hole the angular distribution of disrupted stars has a conspicuous bimodal structure with a local minimum near the equatorial plane. Outside of the influence radius this dependence is weak. We show that the bimodal structure of orbital parameters can be explained by the presence of two families of regular orbits, namely short-axis tube and saucer orbits. Also, we present the consequences of our results for the loss cone in axisymmetric galactic nuclei.
收录类别	SCI
语种	英语
WOS记录号	WOS:000363471600023
内容类型	期刊论文
源URL	[http://ir.bao.ac.cn/handle/114a11/5541]
专题	国家天文台_星系宇宙学研究部
作者单位	1.Chinese Acad Sci, Natl Astron Observ China, Beijing 100012, Peoples R China 2.Chinese Acad Sci, Key Lab Computat Astrophys, Beijing 100012, Peoples R China 3.Heidelberg Univ, Zentrum Astron, Astron Rechen Inst, D-69120 Heidelberg, Germany 4.Natl Acad Sci Ukraine, Main Astron Observ, UA-03680 Kiev, Ukraine 5.Peking Univ, Kavli Inst Astron & Astrophys, Beijing 100871, Peoples R China 6.Chinese Acad Sci, Inst Theoret Phys, Key Lab Frontiers Theoret Phys, Beijing 100190, Peoples R China
推荐引用方式 GB/T 7714	Zhong, Shiyan,Berczik, Peter,Spurzem, Rainer. SUPERMASSIVE BLACK HOLES IN GALACTIC NUCLEI WITH TIDAL DISRUPTION OF STARS. II. AXISYMMETRIC NUCLEI[J]. ASTROPHYSICAL JOURNAL,2015,811(1).
APA	Zhong, Shiyan,Berczik, Peter,&Spurzem, Rainer.(2015).SUPERMASSIVE BLACK HOLES IN GALACTIC NUCLEI WITH TIDAL DISRUPTION OF STARS. II. AXISYMMETRIC NUCLEI.ASTROPHYSICAL JOURNAL,811(1).
MLA	Zhong, Shiyan,et al."SUPERMASSIVE BLACK HOLES IN GALACTIC NUCLEI WITH TIDAL DISRUPTION OF STARS. II. AXISYMMETRIC NUCLEI".ASTROPHYSICAL JOURNAL 811.1(2015).