Observing Lense-Thirring Precession in Tidal Disruption Flares

被引：102
作者：
Stone, Nicholas [1 ]
Loeb, Abraham [1 ]
机构：
[1] Harvard Univ, Dept Astron, Cambridge, MA 02138 USA
来源：
PHYSICAL REVIEW LETTERS | 2012年 / 108卷 / 06期
关键词：
MASSIVE BLACK-HOLES; ACCRETION DISKS; GALACTIC NUCLEI; STARS; OUTBURST;
D O I：
10.1103/PhysRevLett.108.061302
中图分类号：
O4 [物理学];
学科分类号：
0702 ;
摘要：
When a star is tidally disrupted by a supermassive black hole (SMBH), the streams of liberated gas form an accretion disk after their return to pericenter. We demonstrate that Lense-Thirring precession in the spacetime around a rotating SMBH can produce significant time evolution of the disk angular momentum vector, due to both the periodic precession of the disk and the nonperiodic, differential precession of the bound debris streams. Jet precession and periodic modulation of disk luminosity are possible consequences. The persistence of the jetted x-ray emission in the Swift J164 449.3 + 573 451 flare suggests that the jet axis was aligned with the spin axis of the SMBH during this event.
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页数：4
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