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QUASI-PERIODIC VARIATIONS IN X-RAY EMISSION AND LONG-TERM RADIO OBSERVATIONS: EVIDENCE FOR A TWO-COMPONENT JET IN Sw J1644+57
Wang, Jiu-Zhou1; Lei, Wei-Hua1,2,3; Wang, Ding-Xiong1; Zou, Yuan-Chuan1; Zhang, Bing4,5; Gao, He4; Huang, Chang-Yin1,6
Source PublicationASTROPHYSICAL JOURNAL
2014-06-10
Volume788Issue:1
DOI10.1088/0004-637X/788/1/32
Indexed BySCI
Keywordaccretion, accretion disks black hole physics magnetic fields
Abstract

The continued observations of Sw J1644+57 in X-ray and radio bands accumulated a rich data set to study the relativistic jet launched in this tidal disruption event. The X-ray light curve of Sw J1644+57 from 5-30 days presents two kinds of quasi=periodic variations: a 200 s quasi=periodic oscillation (QPO) and a 2.7 day quasi=periodic variation. The latter has been interpreted by a precessing jet launched near the Bardeen-Petterson radius of a warped disk. Here we suggest that the similar to 200 s QPO could be associated with a second, narrower jet sweeping the observer line-of-sight periodically, which is launched from a spinning black hole in the misaligned direction with respect to the black hole's angular momentum. In addition, we show that this two-component jet model can interpret the radio light curve of the event, especially the re-brightening feature starting similar to 100 days after the trigger. From the data we infer that inner jet may have a Lorentz factor of Gamma(j) similar to 5.5 and a kinetic energy of E-k,E-iso similar to 3.0 x 10(52) erg, while the outer jet may have a Lorentz factor of Gamma(j) similar to 2.5 and a kinetic energy of E-k,E-iso similar to 3.0 x 10(53) erg.

Funding ProjectNational Basic Research Program ("973" Program) of China[2014CB845800, 2009CB824800] ; National Natural Science Foundation of China (China-Israel jointed program)[11361140349, 11003004, 11173011, U1231101] ; NSF[AST-0908362] ; Fundamental Research Funds for the Central Universities[HUST: 2013QN021] ; Key Laboratory for the Structure and Evolution of Celestial Objects of Chinese Academy of Sciences
Funding OrganizationNational Basic Research Program (
Language英语
Subject Area天文学 ; 天体物理学 ; 高能天体物理学
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:000337095200032
WOS Research AreaAstronomy & Astrophysics
WOS SubjectAstronomy & Astrophysics
WOS KeywordTIDAL DISRUPTION EVENT ; SUPERMASSIVE BLACK-HOLE ; SWIFT J1644+57 ; ACCRETION DISKS ; BLANDFORD-ZNAJEK ; EARLY AFTERGLOWS ; CENTRAL ENGINE ; EPISODIC JETS ; BURSTS ; MODEL
Citation statistics
Document Type期刊论文
Identifierhttp://ir.ynao.ac.cn/handle/114a53/9441
Collection中国科学院天体结构与演化重点实验室
Corresponding AuthorLei, Wei-Hua
Affiliation1.School of Physics, Huazhong University of Science and Technology, Wuhan 430074, China
2.Key Laboratory for the Structure and Evolution of Celestial Objects, Chinese Academy of Sciences, Kunming 650011, China
3.Purple Mountain Observatory, Chinese Academy of Sciences, Nanjing 210008, China
4.Department of Physics and Astronomy, University of Nevada Las Vegas, 4505 Maryland Parkway, Box 454002, Las Vegas, NV 89154-4002, USA
5.Kavli Institute for Astronomy and Astrophysics and Department of Astronomy, Peking University, Beijing 100871, China
6.School of Mathematics and Statistics, Huazhong University of Science and Technology, 430074 Wuhan, China
Recommended Citation
GB/T 7714
Wang, Jiu-Zhou,Lei, Wei-Hua,Wang, Ding-Xiong,et al. QUASI-PERIODIC VARIATIONS IN X-RAY EMISSION AND LONG-TERM RADIO OBSERVATIONS: EVIDENCE FOR A TWO-COMPONENT JET IN Sw J1644+57[J]. ASTROPHYSICAL JOURNAL,2014,788(1).
APA Wang, Jiu-Zhou.,Lei, Wei-Hua.,Wang, Ding-Xiong.,Zou, Yuan-Chuan.,Zhang, Bing.,...&Huang, Chang-Yin.(2014).QUASI-PERIODIC VARIATIONS IN X-RAY EMISSION AND LONG-TERM RADIO OBSERVATIONS: EVIDENCE FOR A TWO-COMPONENT JET IN Sw J1644+57.ASTROPHYSICAL JOURNAL,788(1).
MLA Wang, Jiu-Zhou,et al."QUASI-PERIODIC VARIATIONS IN X-RAY EMISSION AND LONG-TERM RADIO OBSERVATIONS: EVIDENCE FOR A TWO-COMPONENT JET IN Sw J1644+57".ASTROPHYSICAL JOURNAL 788.1(2014).
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