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arXiv 2305.08910gr-qc
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稳态圆形轴对称时空中表面引力的显式公式

Explicit formulae for surface gravities in stationary circular axi-symmetric spacetimes

Joshua Baines, Matt Visser

AI总结:

本文在极简假设下为稳态圆形轴对称时空建立了度规的自然函数分解,推导出表面引力的显式公式,并将Killing视界的存在性及第零定律与拟视界处曲率奇点的缺失相联系,对天体物理和类比时空研究均有意义。

摘要:

在极简假设下,我们为任意稳态圆形(PT对称)轴对称时空中的时空度规建立了一种自然的函数分解,并给出了表面引力的显式可计算公式。我们将刚性结果(Killing视界的存在性)与第零定律同拟视界处曲率奇点的缺失联系起来。这些观察结果对观测天体物理学家(对大多数螺旋星系中心的冷、暗、重天体进行建模)和类比时空研究群体都具有重要意义,在后者中裸奇点的存在并不必然被否定,且非Killing视界的出现相对常见。

英文摘要:

Using minimalist assumptions we develop a natural functional decomposition for the spacetime metric, and explicit tractable formulae for the surface gravities, in arbitrary stationary circular (PT symmetric) axisymmetric spacetimes. We relate rigidity results, (the existence of a Killing horizon), and the zeroth law to the absence of curvature singularities at the would-be horizons. These observations are of interest to both observational astrophysicists (modelling the cold, dark, heavy objects at the centre of most spiral galaxies), and to the analogue spacetime community, (wherein the presence of naked singularities is not necessarily deprecated, and the occurrence of non-Killing horizons is relatively common).

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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