从圆化紧双星改进后牛顿多极波形的再确认
Improved resummation of post-Newtonian multipolar waveforms from circularized compact binaries
摘要：
本文改进和推广了文献[1]中提出的圆紧双星后牛顿多极波形的重建方法。\cite{Damour:2007xr,Damour:2007yf}。该再确认方法的特征之一是通过将复多极波形$h_{\lm}$ { \it乘法}分解为多个子波来代替标准后牛顿方法的通常{ \it加法}分解。（物理激励）因素：（i）“牛顿”波形，（ii）来自“有效源”的相对论修正，（iii）与史瓦西背景上的传播相关的前导阶尾效应，（iv）剩余尾失相，以及（v）剩余相对论振幅校正$f_{\lm}$。我们在这里探索了一种新的方法，通过将$f_{\lm}$替换为它的第$\ell$根：$ρ_{\lm}=f_{\lm}^{1/\ell}$来重新编译$f_{\lm}$。在极端的质量比的情况下，这recrmation过程的结果在一个更好的协议之间的分析和数值波形比使用标准的后牛顿近似。然后，我们表明，我们最好的近似表现在一个强大的和连续的方式，因为我们“变形”他们的对称质量比$ν\equiv m_1 m_2/(m_1+m_2)^2$从0（极端质量比的情况下）到1/4（等质量的情况下）。本论文还完成了我们的知识的第一后牛顿修正多极矩计算准备使用的显式表达式的第一后牛顿贡献的奇宇称（电流）多极。
英文摘要：
We improve and generalize a resummation method of post-Newtonian multipolar waveforms from circular compact binaries introduced in Refs. \cite{Damour:2007xr,Damour:2007yf}. One of the characteristic features of this resummation method is to replace the usual {\it additive} decomposition of the standard post-Newtonian approach by a {\it multiplicative} decomposition of the complex multipolar waveform $h_{\lm}$ into several (physically motivated) factors: (i) the "Newtonian" waveform, (ii) a relativistic correction coming from an "effective source", (iii) leading-order tail effects linked to propagation on a Schwarzschild background, (iv) a residual tail dephasing, and (v) residual relativistic amplitude corrections $f_{\lm}$. We explore here a new route for resumming $f_{\lm}$ based on replacing it by its $\ell$-th root: $ρ_{\lm}=f_{\lm}^{1/\ell}$. In the extreme-mass-ratio case, this resummation procedure results in a much better agreement between analytical and numerical waveforms than when using standard post-Newtonian approximants. We then show that our best approximants behave in a robust and continuous manner as we "deform" them by increasing the symmetric mass ratio $ν\equiv m_1 m_2/(m_1+m_2)^2$ from 0 (extreme-mass-ratio case) to 1/4 (equal-mass case). The present paper also completes our knowledge of the first post-Newtonian corrections to multipole moments by computing ready-to-use explicit expressions for the first post-Newtonian contributions to the odd-parity (current) multipoles.
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。
