A precise determination of black hole spin in GRO J1655-40
A precise determination of black hole spin in GRO J1655-40
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DOI：
10.1051/0004-6361:20010791
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发表时间：
2001-08-01
影响因子：
6.5
通讯作者：
Kluzniak, W
中科院分区：
文献类型：
--
作者：
Abramowicz, MA;Kluzniak, W
我们注意到，最近发现的450 Hz频率的X射线通量的黑洞候选人GRO J1655-40是在一个3：2的比例，以前已知的300 Hz频率的准周期振荡（QPO）在同一来源。如果黑洞系统中高频QPO的起源是吸积物质的轨道和周转运动之间的共振，如前所述，黑洞的角动量可以精确地确定，给定其质量。我们发现无量纲角动量在0.2
We note that the recently discovered 450 Hz frequency in the X-ray flux of the black hole candidate GRO J1655-40 is in a 3:2 ratio to the previously known 300 Hz frequency of quasi-periodic oscillations (QPO) in the same source. If the origin of high frequency QPOs in black hole systems is a resonance between orbital and epicyclic motion of accreting matter, as suggested previously, the angular momentum of the black hole can be accurately determined, given its mass. We find that the dimensionless angular momentum is in the range 0.2 < j