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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
Source PublicationASTROPHYSICAL JOURNAL
2018-03-10
Volume855Issue:2
DOI10.3847/1538-4357/aab0a5
Contribution Rank第2完成单位
Indexed BySCI
Keywordaccretion, accretion disks black hole physics galaxies: nuclei galaxies: star clusters: general methods: numerical stars: kinematics and dynamics
Abstract

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.

Funding ProjectKorea 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] ; National Natural Science Foundation of China[11303039] ; National Natural Science Foundation of China[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]
Funding OrganizationKorea 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]
Language英语
Subject Area天文学 ; 恒星与银河系
MOST Discipline Catalogue理学 ; 理学::天文学
SubtypeArticle
PublisherIOP PUBLISHING LTD
Publication PlaceTEMPLE CIRCUS, TEMPLE WAY, BRISTOL BS1 6BE, ENGLAND
ISSN0004-637X
URL查看原文
WOS IDWOS:000427634000007
WOS Research AreaAstronomy & Astrophysics
WOS SubjectAstronomy & Astrophysics
WOS KeywordSUPERMASSIVE BLACK-HOLE ; N-BODY SIMULATIONS ; X-RAY OUTBURSTS ; GALACTIC NUCLEI ; STAR-CLUSTERS ; FLARE ; CANDIDATE ; RATES ; JET
Citation statistics
Cited Times:2[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://ir.ynao.ac.cn/handle/114a53/12144
Collection自由探索组
Corresponding AuthorHayasaki, Kimitake
Affiliation1.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
Recommended Citation
GB/T 7714
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.(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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