Destroying extremal Kerr-Newman black holes with test particles

Destroying extremal Kerr-Newman black holes with test particles
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用测试粒子摧毁极值克尔-纽曼黑洞

DOI:
10.1103/physrevd.87.044028
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发表时间:
2012-11
期刊:
Physical Review D - Particles, Fields, Gravitation and Cosmology
影响因子:
--
通讯作者:
Zhang Yuan
Zhang Yuan
中科院分区:
其他
文献类型:
--
作者:
Gao Sijie;Zhang Yuan

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已经证明,如果忽略辐射和自作用力效应,一个接近极端的黑洞可以被测试粒子过度充电或过度旋转,这表明宇宙审查可能失败。相反,现有的文献证据表明,极端黑洞不能在类似的过程中过度充电或过度旋转。在本文中,我们明确地表明,即使是一个完全极端的黑洞可以被一个测试粒子摧毁,导致可能违反宇宙审查。通过考虑在以前的分析中被忽略的高阶项,我们证明了对于任何具有非零电荷和角动量的极端Kerr-Newman黑洞,这种破坏是普遍的。我们还发现,粒子的允许参数范围是非常窄的,这表明辐射和自作用力的影响应被考虑,并可能防止违反宇宙审查。
It has been shown that a nearly extremal black hole can be overcharged or overspun by a test particle if radiative and self-force effects are neglected, indicating that the cosmic censorship might fail. In contrast, the existing evidence in literature suggests that an extremal black hole cannot be overcharged or overspun in a similar process. In this paper, we show explicitly that even an exactly extremal black hole can be destroyed by a test particle, leading to a possible violation of the cosmic censorship. By considering higher order terms, which were neglected in previous analysis, we show that the violation is generic for any extremal Kerr-Newman black hole with nonvanishing charge and angular momentum. We also find that the allowed parameter range for the particle is very narrow, indicating that radiative and self-force effects should be considered and may prevent violation of the cosmic censorship.
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