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arXiv 0808.3941gr-qchep-th
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两个Kerr黑洞之间的相互作用

On the interaction between two Kerr black holes

Carlos A. R. Herdeiro, Carmen Rebelo

摘要:

双克尔解决方案是使用Backlund变换和Belinskiii-Zakharov逆散射技术。我们建立一个字典之间的参数化自然得到的两种方法,并显示其等价性。然后,我们研究了满足Z_2 ^∞不变的轴条件的渐近平坦双克尔系统,对于这个系统,两个黑洞之间的作用力有一个精确的公式,可以用它们的物理量和坐标距离来表示。然后我们证明了:1)两个黑洞的角速度从无限远处的Kerr值减小到接触极限处的零,2)两个黑洞的极值极限由|J| = cM^2给出,其中c与距离有关,随着距离的减小从1变到无穷大; 3)对于足够大的角动量,黑洞的温度在某个有限坐标距离处达到最大值。所有这些结果都解释在系统的拖动效果。

英文摘要:

The double-Kerr solution is generated using both a Backlund transformation and the Belinskii-Zakharov inverse-scattering technique. We build a dictionary between the parametrisations naturally obtained in the two methods and show their equivalence. We then focus on the asymptotically flat double-Kerr system obeying the axis condition which is Z_2^ϕinvariant; for this system there is an exact formula for the force between the two black holes, in terms of their physical quantities and the coordinate distance. We then show that 1) the angular velocity of the two black holes decreases from the usual Kerr value at infinite distance to zero in the touching limit; 2) the extremal limit of the two black holes is given by |J|=cM^2, where c depends on the distance and varies from one to infinity as the distance decreases; 3) for sufficiently large angular momentum the temperature of the black holes attains a maximum at a certain finite coordinate distance. All of these results are interpreted in terms of the dragging effects of the system.

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