BLACK HOLE SPIN IN Sw J1644+57 and Sw J2058+05
BLACK HOLE SPIN IN Sw J1644+57 and Sw J2058+05
复制标题
Sw J1644 57 和 Sw J2058 05 中的黑洞旋转
DOI:
10.1088/2041-8205/740/1/l27
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发表时间:
2011-08
影响因子:
7.9
通讯作者:
Lei, Wei-Hua
中科院分区:
文献类型:
--
作者:
Zhang, Bing;Lei, Wei-Hua
Recently, a hard X-ray transient event, Sw J1644+57, was discovered by the Swift satellite. It likely marks the onset of a relativistic jet from a supermassive black hole (BH), possibly triggered by a tidal disruption event (TDE). Another candidate in the same category, Sw J2058+05, was also reported. The low event rate suggests that only a small fraction of TDEs launch relativistic jets. A common speculation is that these rare events are related to rapidly spinning BHs. We attribute jet launching to the Blandford–Znajek mechanism and use the available data to constrain the BH spin parameter for the two events. It is found that the two BHs indeed carry a moderate to high spin, suggesting that BH spin is likely the crucial factor behind the Sw J1644+57-like events.
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