Eccentric-orbit extreme-mass-ratio-inspiral radiation: Analytic forms of leading-logarithm and subleading-logarithm flux terms at high PN orders
Eccentric-orbit extreme-mass-ratio-inspiral radiation: Analytic forms of leading-logarithm and subleading-logarithm flux terms at high PN orders
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偏心轨道极端质量比吸气辐射:高 PN 阶下前对数和次前对数通量项的解析形式
DOI:
10.1103/physrevd.100.104060
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发表时间:
2019
影响因子:
5
通讯作者:
Evans, Charles R.
中科院分区:
文献类型:
--
作者:
Munna, Christopher;Evans, Charles R.
We present new results on the analytic eccentricity dependence of several sequences of gravitational wave flux terms at high post-Newtonian (PN) order for extreme-mass-ratio inspirals. These sequences are the leading logarithms, which appear at PN ordersandfor integers(is a PN compactness parameter), and the subleading logarithms, which appear at ordersand(), in both the energy and angular momentum radiated to infinity. For the energy flux leading logarithms, we show that to arbitrarily high PN order, their eccentricity dependence is determined by particular sums over the function, derived from the Newtonian mass quadrupole moment, that normally gives the spectral content of the Peters-Mathews flux as a function of radial harmonic. An analogous power spectrum g˜(n,et) determines the leading logarithms of the angular momentum flux. For subleading logs, the quadrupole power spectra are again shown to play a role, providing a distinguishable part of the eccentricity dependence of these flux terms to high PN order. With the quadrupole contribution understood, the remaining analytic eccentricity dependence of the subleading logs can, in principle, be determined more easily using black hole perturbation theory. We show this procedure in action, deriving the complete analytic structure of thesubleading-log term and an analytic expansion of thesubleading log to high order in a power series in eccentricity. We discuss how these methods might be extended to other sequences of terms in the PN expansion involving logarithms.
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