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arXiv 1608.02899gr-qc
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Kerr黑洞的次领先阶改进的潮汐加热和转矩

Improved next-to-leading order tidal heating and torquing of a Kerr black hole

Katerina Chatziioannou, Eric Poisson, Nicolas Yunes

摘要:

我们计算了在外部时空曲率中处于次领先阶的潮汐变形、快速旋转的黑洞事件视界上的能量和角动量通量。这些都表示在潮汐四极矩和它们的时间导数,这提供了一个通用的潮汐环境的表征。作为结果的应用,我们给出了当黑洞是一个缓慢运动的准圆轨道上的双星系统的一员时,视界上的能量和角动量通量的表达式。我们的表达式是精确到1.5后牛顿秩序以外的领先的顺序流量,但它们是有效的任意质量比。我们比较我们的结果与以前得到的极端质量比二进制的情况下,发现他们不同意在1.5后牛顿秩序。我们调查了一些可能的来源,这种差异,但最终无法解决它。

英文摘要:

We calculate the energy and angular momentum fluxes across the event horizon of a tidally deformed, rapidly rotating black hole to next-to-leading order in the curvature of the external spacetime. These are expressed in terms of tidal quadrupole moments and their time derivatives, which provide a characterization of a generic tidal environment. As an application of our results, we provide an expression for the energy and angular-momentum fluxes across the horizon when the black hole is a member of a binary system on a slowly-moving, quasi-circular orbit. Our expressions are accurate to 1.5 post-Newtonian order beyond the leading-order fluxes, but they are valid for arbitrary mass ratios. We compare our results to those previously obtained in the case of an extreme mass ratio binary, and find that they do not agree at the 1.5 post-Newtonian order. We investigate a number of possible sources for this discrepancy, but are ultimately unable to resolve it.

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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