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Classification of Tidal Disruption Events Based on Stellar Orbital Properties
Hayasaki, Kimitake1; Zhong SY(钟诗言)2; Li, Shuo3; Berczik, Peter3,4,5; Spurzem, Rainer3,4,6,7; Hayasaki, Kimitake(Chungbuk Natl Univ, Dept Astron & Space Sci, Cheongju 361763, South Korea)
发表期刊ASTROPHYSICAL JOURNAL
2018-03-10
卷号855期号:2
DOI10.3847/1538-4357/aab0a5
产权排序第2完成单位
收录类别SCI
关键词Black Hole Physics Galaxies: Nuclei Galaxies: Star Clusters: General Methods: Numerical Stars: Kinematics And Dynamics Accretion Accretion Disks
摘要We study the rates of tidal disruption of stars on bound to unbound orbits by intermediate-mass to supermassive black holes using high-accuracy direct N-body experiments. Stars from the star cluster approaching the black hole can have three types of orbit: eccentric, parabolic, and hyperbolic. Since the mass fallback rate shows different variabilities depending on the orbital type, we can classify tidal disruption events (TDEs) into three main categories: eccentric, parabolic, and hyperbolic. The respective TDEs are characterized by two critical values of the orbital eccentricity: the lower critical eccentricity is the one below which stars on eccentric orbits cause finite, intense accretion, and the upper critical eccentricity is the one above which stars on hyperbolic orbits cause no accretion. Moreover, we find that parabolic TDEs can be divided into three subclasses: precisely parabolic, marginally eccentric, and marginally hyperbolic. We analytically derive that the mass fallback rate of marginally eccentric TDEs can be flatter and slightly higher than the standard fallback rate proportional to t(-5/3), whereas it can be flatter and lower for marginally hyperbolic TDEs. We confirm using N-body experiments that only a few eccentric, precisely parabolic, and hyperbolic TDEs can occur in a spherical stellar system with a single intermediate-mass to supermassive black hole. A substantial fraction of the stars approaching the black hole would cause marginally eccentric or marginally hyperbolic TDEs.
项目资助者Korea Astronomy and Space Science Institute (KASI) under the RD program ; Basic Science Research Program through the National Research Foundation of Korea (NRF) - Ministry of Education(NRF-2017R1D1A1B03028580) ; Chinese Academy of Sciences (CAS) through the Silk Road Project at NAOC, through the CAS Visiting Professorship for Senior International Scientists(2009S1-5) ; Chinese Academy of Sciences (CAS) through the "Qianren" special foreign experts programme of China ; National Natural Science Foundation of China(NSFC 11603067, 11303039, 11673032) ; NASU under the Main Astronomical Observatory GRID/GPU computing cluster project ; Ministry of Finance of the People's Republic of China(ZDYZ2008-2) ; Strategic Priority Research Program (PilotB) "Multi-waveband Gravitational Wave Universe" of the CAS(XDB23040100)
语种英语
学科领域天文学
文章类型Article
ISSN0004-637X
URL查看原文
WOS记录号WOS:000427634000007
WOS研究方向Astronomy & Astrophysics
WOS类目Astronomy & Astrophysics
关键词[WOS]SUPERMASSIVE BLACK-HOLE ; N-BODY SIMULATIONS ; X-RAY OUTBURSTS ; GALACTIC NUCLEI ; STAR-CLUSTERS ; FLARE ; CANDIDATE ; RATES ; JET
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被引频次:1[WOS]   [WOS记录]     [WOS相关记录]
文献类型期刊论文
条目标识符http://ir.ynao.ac.cn/handle/114a53/12144
专题自由探索组
通讯作者Hayasaki, Kimitake(Chungbuk Natl Univ, Dept Astron & Space Sci, Cheongju 361763, South Korea)
作者单位1.Department of Astronomy and Space Science, Chungbuk National University, Cheongju 361-763, Republic of Korea
2.Yunnan Observatories, Chinese Academy of Sciences, 396 Yang-Fang-Wang, Guandu District, 650216, Kunming, Yunnan, People's Republic of China
3.National Astronomical Observatories of China and Key Laboratory for Computational Astrophysics, Chinese Academy of Sciences, 20A Datun Rd., Chaoyang District, 100012, Beijing, People's Republic of China
4.Astronomisches Rechen-Institut, Zentrum für Astronomie, University of Heidelberg, Mönchhofstrasse 12-14, D-69120 Heidelberg, Germany
5.Main Astronomical Observatory, National Academy of Sciences of Ukraine, 27 Akademika Zabolotnoho St., 03680 Kyiv, Ukraine
6.Kavli Institute for Astronomy and Astrophysics, Peking University, 100871 Beijing, People's Republic of China
7.Frankfurt Institute for Advanced Studies (FIAS), Ruth-Moufang-Straße 1, 60438 Frankfurt am Main, Germany
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Hayasaki, Kimitake,Zhong SY,Li, Shuo,et al. Classification of Tidal Disruption Events Based on Stellar Orbital Properties[J]. ASTROPHYSICAL JOURNAL,2018,855(2).
APA Hayasaki, Kimitake,Zhong SY,Li, Shuo,Berczik, Peter,Spurzem, Rainer,&Hayasaki, Kimitake.(2018).Classification of Tidal Disruption Events Based on Stellar Orbital Properties.ASTROPHYSICAL JOURNAL,855(2).
MLA Hayasaki, Kimitake,et al."Classification of Tidal Disruption Events Based on Stellar Orbital Properties".ASTROPHYSICAL JOURNAL 855.2(2018).
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