FRAME DRAGGING, DISK WARPING, JET PRECESSING, AND DIPPED X-RAY LIGHT CURVE OF Sw J1644+57

CORC > 云南天文台 > 中国科学院云南天文台 > 中国科学院天体结构与演化重点实验室

	FRAME DRAGGING, DISK WARPING, JET PRECESSING, AND DIPPED X-RAY LIGHT CURVE OF Sw J1644+57
	Lei, Wei-Hua 1,2,3; Zhang, Bing 2,4; Gao, He 2
刊名	ASTROPHYSICAL JOURNAL
	2013-01-10
卷号	762 期号:2
关键词	accretion black hole physics magnetic fields accretion disks
ISSN号	0004-637X
通讯作者	Lei, WH (reprint author), Huazhong Univ Sci & Technol, Sch Phys, Wuhan 430074, Peoples R China.
英文摘要	The X-ray transient source Sw J1644+57 recently discovered by Swift is believed to be triggered by tidal disruption of a star by a rapidly spinning supermassive black hole (SMBH). For such events, the outer disk is very likely misaligned with respect to the equatorial plane of the spinning SMBH, since the incoming star before disruption most likely has an inclined orbital plane. The tilted disk is subject to the Lense-Thirring torque, which tends to twist and warp due to the Bardeen-Petterson effect. The inner disk tends to align with the SMBH spin, while the outer region tends to remain in the stellar orbital plane, with a transition zone around the Bardeen-Petterson radius. The relativistic jet launched from the spinning SMBH would undergo precession. The 5-30 day X-ray light curve of Sw J1644+57 shows a quasi-periodic (2.7 day) variation with noticeable narrow dips. We numerically solve a warped disk and propose a jet-precessing model by invoking a Blandford-Znajek jet collimated by a wind launched near the Bardeen-Petterson radius. Through simulations, we show that the narrow dips in the X-ray light curve can be reproduced for a range of geometric configurations. From the data we infer that the inclination angle of the initial stellar orbit is in the range of 10 degrees-20 degrees from the SMBH equatorial plane, that the jet should have a moderately high Lorentz factor, and that the inclination angle, jet opening angle, and observer's viewing angle are such that the duty cycle of the line of sight sweeping the jet cone is somewhat less than 0.5.
学科主题	Astronomy & Astrophysics
WOS标题词	Science & Technology ; Physical Sciences
类目[WOS]	Astronomy & Astrophysics
研究领域[WOS]	Astronomy & Astrophysics
关键词[WOS]	MASSIVE BLACK-HOLE ; TIDAL DISRUPTION ; NUMERICAL-SIMULATION ; ACCRETION DISCS ; BURSTS ; EVOLUTION ; DYNAMICS ; MODEL ; STAR ; J164449.3+573451
收录类别	SCI
原文出处	http://iopscience.iop.org/article/10.1088/0004-637X/762/2/98/meta
语种	英语
WOS记录号	WOS:000313008900032
公开日期	2016-06-01
内容类型	期刊论文
源URL	[http://ir.ynao.ac.cn/handle/114a53/9419]
专题	云南天文台_中国科学院天体结构与演化重点实验室
作者单位	1.School of Physics, Huazhong University of Science and Technology, Wuhan 430074, China 2.Department of Physics and Astronomy, University of Nevada Las Vegas, 4505 Maryland Parkway, Box 454002, Las Vegas, NV 89154-4002, USA 3.Key Laboratory for the Structure and Evolution of Celestial Objects, Chinese Academy of Sciences, Kunming 650011, China 4.Kavli Institute for Astronomy and Astrophysics and Department of Astronomy, Peking University, Beijing 100871, China
推荐引用方式 GB/T 7714	Lei, Wei-Hua,Zhang, Bing,Gao, He. FRAME DRAGGING, DISK WARPING, JET PRECESSING, AND DIPPED X-RAY LIGHT CURVE OF Sw J1644+57[J]. ASTROPHYSICAL JOURNAL,2013,762(2).
APA	Lei, Wei-Hua,Zhang, Bing,&Gao, He.(2013).FRAME DRAGGING, DISK WARPING, JET PRECESSING, AND DIPPED X-RAY LIGHT CURVE OF Sw J1644+57.ASTROPHYSICAL JOURNAL,762(2).
MLA	Lei, Wei-Hua,et al."FRAME DRAGGING, DISK WARPING, JET PRECESSING, AND DIPPED X-RAY LIGHT CURVE OF Sw J1644+57".ASTROPHYSICAL JOURNAL 762.2(2013).