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arXiv 1809.04715gr-qc
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克尔孤立视界附近的时空

Spacetime near Kerr isolated horizon

Jerzy Lewandowski, Carmen Li

摘要:

孤立视界理论提供了一个准定域框架来研究平衡态黑洞视界附近的时空几何,而不涉及远离视界的结构。虽然Kerr-(A)dS和更一般的代数特解的几何性质最近在孤立视界形式主义中引起了很大的兴趣,但它们的视界度量从未在适应的Bondi类坐标系中明确地写下来。按照Krishnan的方法,并假设视界对称性扩展到一定的顺序,在这篇文章中,我们提出了一个一般的方法来计算度规函数的顺序径向4维邦迪样坐标从一个小的内在数据集-连接和Newman-Penrose自旋系数$π$上指定的视界横截面。应用这种一般方法,我们然后提出了非极值Kerr dS在Bondi-类坐标的水平度量。对于不含宇宙学常数的纯Kerr情形,我们也明确地给出了一阶度规函数。

英文摘要:

The theory of isolated horizon provides a quasi-local framework to study the spacetime geometry in the neighbourhood of the horizon of a black hole in equilibrium without any reference to structures far away from the horizon. While the geometric properties of the Kerr-(A)dS and more general algebraically special solutions have drawn substantial interest recently in the isolated horizon formalism, their horizon metrics have never been written down explicitly in the adapted Bondi-like coordinate system. Following the approach by Krishnan and assuming that the horizon symmetry extends to certain order in the bulk, we present in this note a general method to compute the metric functions order by order radially in Bondi-like coordinates in 4-dimensions from a small set of intrinsic data -- the connection and the Newman-Penrose spin coefficient $π$ specified on the horizon cross-section. Applying this general method, we then present the horizon metric of non-extremal Kerr-dS in Bondi-like coordinates. For the pure Kerr case without a cosmological constant, we also show explicitly the metric functions to the first order.

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