Overspinning a black hole with a test body.

Overspinning a black hole with a test body.
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DOI:
10.1103/physrevlett.103.141101
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发表时间:
2009-07
影响因子:
8.6
通讯作者:
T. Jacobson;T. Sotiriou
T. Jacobson;T. Sotiriou
中科院分区:
物理与天体物理1区
文献类型:
--
作者:
T. Jacobson;T. Sotiriou

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人们早就知道,一个旋转最大的黑洞不能通过投掷测试物体而过度旋转。在这里,我们表明,如果相反的黑洞开始低于最大自旋,那么确实可以实现超旋。我们发现,如果物体携带轨道角动量而不是自旋角动量,则可以满足对测试物体尺寸和内部结构的要求。我们的分析忽略了辐射和自作用力的影响,这可能会防止过旋。
It has long been known that a maximally spinning black hole cannot be overspun by tossing in a test body. Here we show that if instead the black hole starts out with below maximal spin, then indeed overspinning can be achieved. We find that requirements on the size and internal structure of the test body can be met if the body carries in orbital but not spin angular momentum. Our analysis neglects radiative and self-force effects, which may prevent the overspinning.