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arXiv 0905.3244gr-qchep-th
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Kerr-Newman黑洞的广义Painleve-Gullstrand描述

Generalized Painleve-Gullstrand descriptions of Kerr-Newman black holes

Huei-Chen Lin, Chopin Soo

摘要:

对带电旋转黑洞的Kerr-Newman族构造了广义Painleve-Gullstrand度规.这些描述没有任何坐标奇点;此外,与多兰和其他提出的度规不同,引入了一个额外的可调函数,以确保度规中的所有变量对于质量M、电荷Q、角动量aM和宇宙学常数Λ> - 3/(a^2)的所有值都保持实数。为了描述Kerr-Newman时空中的费米子,在视界处施加非奇异的Vierbein 1-形式的更强要求,并通过局部Lorentz提升消除坐标奇异性。对其他已知的克尔-纽曼黑洞的维尔拜因场进行了分析和讨论,发现其中一些描述实际上与物理洛伦兹变换在Boyer-Lindquist坐标中的原始克尔-纽曼表达式无关--这就是这些度量中出现复杂分量的原因(对于径向坐标的某些范围)。作为我们构造的一个应用,用Parikh和Wilczek的方法导出了Kerr黑洞的正确有效Hawking温度。

英文摘要:

Generalized Painleve-Gullstrand metrics are explicitly constructed for the Kerr-Newman family of charged rotating black holes. These descriptions are free of all coordinate singularities; moreover, unlike the Doran and other proposed metrics, an extra tunable function is introduced to ensure all variables in the metrics remain real for all values of the mass M, charge Q, angular momentum aM, and cosmological constant Λ> - 3/(a^2). To describe fermions in Kerr-Newman spacetimes, the stronger requirement of non-singular vierbein one-forms at the horizon(s) is imposed and coordinate singularities are eliminated by local Lorentz boosts. Other known vierbein fields of Kerr-Newman black holes are analysed and discussed; and it is revealed that some of these descriptions are actually not related by physical Lorentz transformations to the original Kerr-Newman expression in Boyer-Lindquist coordinates - which is the reason complex components appear (for certain ranges of the radial coordinate) in these metrics. As an application of our constructions the correct effective Hawking temperature for Kerr black holes is derived with the method of Parikh and Wilczek.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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