Direct N-body Simulations of Tidal Disruption Rate Evolution in Equal-mass Galaxy Mergers

doi:10.3847/1538-4357/ab3e4a

CORC > 国家天文台 > 中国科学院国家天文台

	Direct N-body Simulations of Tidal Disruption Rate Evolution in Equal-mass Galaxy Mergers
	Li, Shuo 1,2,3; Berczik, Peter 1,2,4,5; Chen, Xian 3,6; Liu, F. K.3,6; Spurzem, Rainer 1,2,4,6,7; Qiu, Yu 3
刊名	ASTROPHYSICAL JOURNAL
	2019-10-01
卷号	883 期号:2 页码:16
关键词	galaxies: evolution galaxies: interactions galaxies: kinematics and dynamics galaxies: nuclei methods: numerical
ISSN号	0004-637X
DOI	10.3847/1538-4357/ab3e4a
英文摘要	The hierarchical galaxy formation model predicts supermassive black hole binaries (SMBHBs) in galactic nuclei. Due to the gas poor environment and the limited spatial resolution in observations they may hide in the center of many a galaxy. However, a close encounter of a star with one of the supermassive black holes (SMBHs) may tidally disrupt it to produce a tidal disruption event (TDE) and temporarily light up the SMBH. In a previous work, we investigated direct N-body simulations with the evolution of TDE rates of SMBHB systems in galaxy mergers of equal mass. In this work we extend the investigation to unequal-mass mergers. Our results show that, when two SMBHs are far away from each other, the TDE rate of each host galaxy is similar as in an isolated galaxy. As the two galaxies and their SMBHs separation shrink, the TDE rate increases gradually until it reaches a maximum shortly after the two SMBHs become bound. In this stage, the averaged TDE rate can be enhanced by several times to an order of magnitude relative to isolated single galaxies. Our simulations show that the dependence of the TDE accretion rate on the mass ratio in this stage can be well fitted by power-law relations for both SMBHs. After the bound SMBHB forms, the TDE rate decreases with its further evolution. We also find that in minor mergers TDEs of the secondary SMBH during and after the bound binary formation are mainly contributed by stars from the other galaxy.
资助项目	National Natural Science Foundation of China[NSFC11473003] ; National Natural Science Foundation of China[NSFC11873022] ; National Natural Science Foundation of China[NSFC11303039] ; National Natural Science Foundation of China[NSFC11673032] ; Key International Partnership Program of the Chinese Academy of Sciences (CAS)[114A11-KYSB20170015] ; Strategic Priority Research Program (Pilot B) Multiwavelength gravitational wave universe of CAS[XDB23040100] ; CAS through the Silk Road Project at the NAOC ; Qianren special foreign experts program of China ; Key Laboratory of Computational Astrophysics ; CAS President's International Fellowship ; Ministry of Finance of People's Republic of China[ZDYZ2008-2]
WOS关键词	SUPERMASSIVE BLACK-HOLES ; GRAVITATIONAL-WAVES ; STARS ; ACCRETION ; BINARIES ; PERTURBATIONS ; PREDICTIONS ; OBJECTS ; EVENTS
WOS研究方向	Astronomy & Astrophysics
语种	英语
出版者	IOP PUBLISHING LTD
WOS记录号	WOS:000488086700003
资助机构	National Natural Science Foundation of China ; National Natural Science Foundation of China ; Key International Partnership Program of the Chinese Academy of Sciences (CAS) ; Key International Partnership Program of the Chinese Academy of Sciences (CAS) ; Strategic Priority Research Program (Pilot B) Multiwavelength gravitational wave universe of CAS ; Strategic Priority Research Program (Pilot B) Multiwavelength gravitational wave universe of CAS ; CAS through the Silk Road Project at the NAOC ; CAS through the Silk Road Project at the NAOC ; Qianren special foreign experts program of China ; Qianren special foreign experts program of China ; Key Laboratory of Computational Astrophysics ; Key Laboratory of Computational Astrophysics ; CAS President's International Fellowship ; CAS President's International Fellowship ; Ministry of Finance of People's Republic of China ; Ministry of Finance of People's Republic of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; Key International Partnership Program of the Chinese Academy of Sciences (CAS) ; Key International Partnership Program of the Chinese Academy of Sciences (CAS) ; Strategic Priority Research Program (Pilot B) Multiwavelength gravitational wave universe of CAS ; Strategic Priority Research Program (Pilot B) Multiwavelength gravitational wave universe of CAS ; CAS through the Silk Road Project at the NAOC ; CAS through the Silk Road Project at the NAOC ; Qianren special foreign experts program of China ; Qianren special foreign experts program of China ; Key Laboratory of Computational Astrophysics ; Key Laboratory of Computational Astrophysics ; CAS President's International Fellowship ; CAS President's International Fellowship ; Ministry of Finance of People's Republic of China ; Ministry of Finance of People's Republic of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; Key International Partnership Program of the Chinese Academy of Sciences (CAS) ; Key International Partnership Program of the Chinese Academy of Sciences (CAS) ; Strategic Priority Research Program (Pilot B) Multiwavelength gravitational wave universe of CAS ; Strategic Priority Research Program (Pilot B) Multiwavelength gravitational wave universe of CAS ; CAS through the Silk Road Project at the NAOC ; CAS through the Silk Road Project at the NAOC ; Qianren special foreign experts program of China ; Qianren special foreign experts program of China ; Key Laboratory of Computational Astrophysics ; Key Laboratory of Computational Astrophysics ; CAS President's International Fellowship ; CAS President's International Fellowship ; Ministry of Finance of People's Republic of China ; Ministry of Finance of People's Republic of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; Key International Partnership Program of the Chinese Academy of Sciences (CAS) ; Key International Partnership Program of the Chinese Academy of Sciences (CAS) ; Strategic Priority Research Program (Pilot B) Multiwavelength gravitational wave universe of CAS ; Strategic Priority Research Program (Pilot B) Multiwavelength gravitational wave universe of CAS ; CAS through the Silk Road Project at the NAOC ; CAS through the Silk Road Project at the NAOC ; Qianren special foreign experts program of China ; Qianren special foreign experts program of China ; Key Laboratory of Computational Astrophysics ; Key Laboratory of Computational Astrophysics ; CAS President's International Fellowship ; CAS President's International Fellowship ; Ministry of Finance of People's Republic of China ; Ministry of Finance of People's Republic of China
内容类型	期刊论文
源URL	[http://ir.bao.ac.cn/handle/114a11/28027]
专题	中国科学院国家天文台
通讯作者	Li, Shuo
作者单位	1.Chinese Acad Sci, Natl Astron Observ, 20A Datun Rd, Beijing 100012, Peoples R China 2.Chinese Acad Sci, Key Lab Computat Astrophys, 20A Datun Rd, Beijing 100012, Peoples R China 3.Peking Univ, Sch Phys, Dept Astron, Yiheyuan Lu 5, Beijing 100871, Peoples R China 4.Heidelberg Univ, Astron Rechen Inst, Zentrum Astron, Mochhofstr 12-14, D-69120 Heidelberg, Germany 5.Natl Acad Sci Ukraine, Main Astron Observ, 27 Akad Zabolotnoho St, UA-03680 Kiev, Ukraine 6.Peking Univ, Kavli Inst Astron & Astrophys, Yiheyuan Lu 5, Beijing 100871, Peoples R China 7.Frankfurt Inst Adv Studies, Frankfurt, Germany
推荐引用方式 GB/T 7714	Li, Shuo,Berczik, Peter,Chen, Xian,et al. Direct N-body Simulations of Tidal Disruption Rate Evolution in Equal-mass Galaxy Mergers[J]. ASTROPHYSICAL JOURNAL,2019,883(2):16.
APA	Li, Shuo,Berczik, Peter,Chen, Xian,Liu, F. K.,Spurzem, Rainer,&Qiu, Yu.(2019).Direct N-body Simulations of Tidal Disruption Rate Evolution in Equal-mass Galaxy Mergers.ASTROPHYSICAL JOURNAL,883(2),16.
MLA	Li, Shuo,et al."Direct N-body Simulations of Tidal Disruption Rate Evolution in Equal-mass Galaxy Mergers".ASTROPHYSICAL JOURNAL 883.2(2019):16.