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; Lei, WH (reprint author), Huazhong Univ Sci & Technol, Sch Phys, Wuhan 430074, Peoples R China.
发表期刊ASTROPHYSICAL JOURNAL
2014-06-10
卷号788期号:1
DOI10.1088/0004-637X/788/1/32
收录类别SCI
关键词Black Hole Physics Accretion Magnetic Fields Accretion Disks
摘要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.
项目资助者National 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
语种英语
学科领域Astronomy & Astrophysics
文章类型Article
ISSN0004-637X
URL查看原文
WOS记录号WOS:000337095200032
WOS研究方向Astronomy & Astrophysics
WOS类目Astronomy & Astrophysics
关键词[WOS]TIDAL DISRUPTION EVENT ; SUPERMASSIVE BLACK-HOLE ; SWIFT J1644+57 ; ACCRETION DISKS ; BLANDFORD-ZNAJEK ; EARLY AFTERGLOWS ; CENTRAL ENGINE ; EPISODIC JETS ; BURSTS ; MODEL
引用统计
文献类型期刊论文
条目标识符http://ir.ynao.ac.cn/handle/114a53/9441
专题中国科学院天体结构与演化重点实验室
通讯作者Lei, WH (reprint author), Huazhong Univ Sci & Technol, Sch Phys, Wuhan 430074, Peoples R China.
作者单位1.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
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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.,...&Lei, WH .(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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