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arXiv 1403.2697gr-qc
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20次后牛顿阶Kerr黑洞轨道粒子的引力波通量:一种数值方法

Gravitational-wave flux for a particle orbiting a Kerr black hole to 20th post-Newtonian order: a numerical approach

Abhay G Shah

摘要:

在这篇文章中,我们提出的后牛顿(pN)系数的能量通量(和角动量通量)在无穷远处和事件视界的圆形,赤道轨道上的粒子约克尔黑洞(质量$M$和自旋参数$a$)到20 pN的顺序。当pN项不是$a/M$中的多项式并且包含无理函数(如polygamma函数)时,它被写为$a/M$的幂级数。这是通过以大于$10^{600}$中的1部分的精度数值计算通量来实现的。如此高的精度使我们能够提取pN系数的分析值,这些系数是超越量的线性组合,如欧拉常数、素数的幂和$π$的幂。我们还提出了22 pN展开(自旋无关的pN展开)的入射能流在事件视界的圆形轨道上的粒子围绕史瓦西黑洞。

英文摘要:

In this article we present the post-Newtonian (pN) coefficients of the energy flux (and angular momentum flux) at infinity and event horizon for a particle in circular, equatorial orbits about a Kerr black hole (of mass $M$ and spin-parameter $a$) up to 20-pN order. When a pN term is not a polynomial in $a/M$ and includes irrational functions (like polygamma functions), it is written as a power series of $a/M$. This is achieved by calculating the fluxes numerically with an accuracy greater than 1 part in $10^{600}$. Such high accuracy allows us to extract analytical values of pN coefficients that are linear combinations of transcendentals like the Euler constant, logarithms of prime numbers and powers of $π$. We also present the 22-pN expansion (spin-independent pN expansion) of the ingoing energy flux at the event horizon for a particle in circular orbit about a Schwarzschild black hole.

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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