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arXiv 1802.07069gr-qchep-th
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旋转黑洞附近的正则标架

On regular frames near rotating black holes

O. B. Zaslavskii

摘要:

我们考虑一般轴对称旋转静止黑洞的度规。给出了构造视界附近正则坐标系的一般方法.作为明确的例子,克尔和克尔-纽曼-(反)德西特度量被认为是。它示出了如何旋转版本的Painleve '-Gullstrand和Doran坐标出现在这个计划作为特殊情况。对于2+1形式的度量,得到了Lemaittre坐标系的直接推广。结果表明,引入正则标架的可能性与黑洞角速度的恒定性以及决定时空旋转的度规系数趋于黑洞的速率有间接的关系。

英文摘要:

We consider the metric of a generic axially symmetric rotating stationary black hole. The general approach is developed that enables us to construct coordinate frame regular near the horizon. As explicit examples, the Kerr and Kerr-Newmann-(anti-)de Sitter metrics are considered. It is shown how the rotational versions of the Painleve'-Gullstrand and Doran coordinates appear in this scheme as particular cases. For the 2+1 version of the metric the direct generalization of the Lemaître coordinate system is obtained. It is shown that the possibility of introducing a regular frame is indirectly related to the constancy of a black hole angular velocity and the rate with which the metric coefficient responsible for the rotation of spacetime, tends to it.

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