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arXiv 1907.13435gr-qc
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用测试场超旋Kerr-MOG黑洞和黑洞动力学第三定律

Overspinning Kerr-MOG black holes by test fields and the third law of black hole dynamics

Koray Düztaş

摘要:

我们对Kerr-MOG黑洞与标量场相互作用的弱形式宇宙监督猜想和黑洞动力学第三定律的有效性进行了评估。忽略反反应的影响,我们首先表明,极端和近极端的克尔-MOG黑洞可以overspun到裸奇点的标量测试场的频率略高于超辐射极限。此外,近极值的Kerr-Mog黑洞可以被测试场不断地驱动到极值。接下来,我们采用基于事件视界的角速度在测试场吸收之前增加的论点的反作用效应。在考虑了反反应效应的情况下,我们得到了弱形式的宇宙监督和第三定律对具有修正参数$α\lesssim 0.03$的Kerr-Mog黑洞都成立,包括具有修正参数$α=0$的Kerr情形.

英文摘要:

We evaluate the validity of the weak form of the cosmic censorship conjecture and the third law of black hole dynamics for Kerr-MOG black holes interacting with scalar test fields. Ignoring backreaction effects, we first show that both extremal and nearly extremal Kerr-MOG black holes can be overspun into naked singularities by scalar test fields with a frequency slightly above the superradiance limit. In addition, nearly extremal Kerr-Mog black holes can be continuously driven to extremality by test fields. Next, we employ backreaction effects based on the argument that the angular velocity of the event horizon increases before the absorption of the test field. Incorporating the backreaction effects, we derive that the weak form of the cosmic censorship and the third law are both valid for Kerr-Mog black holes with a modification parameter $α\lesssim 0.03$, which includes the Kerr case with $α=0$.

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