期刊
ASTROPHYSICAL JOURNAL LETTERS
卷 740, 期 1, 页码 -出版社
IOP PUBLISHING LTD
DOI: 10.1088/2041-8205/740/1/L27
关键词
accretion, accretion disks; black hole physics; magnetic fields
资金
- NSF [AST-0908362]
- NASA [NNX10AD48G]
- National Natural Science Foundation of China [11003004, 10873005]
- National Basic Research Program (973 Program) of China [2009CB824800]
- China Scholarship Program
- Direct For Mathematical & Physical Scien
- Division Of Astronomical Sciences [0908362] Funding Source: National Science Foundation
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.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据