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arXiv 1406.0401gr-qc
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合并自旋黑洞双星衰荡波形的一种新的解析表示

A new analytic representation of the ringdown waveform of coalescing spinning black hole binaries

Thibault Damour, Alessandro Nagar

摘要:

本文提出了一种新的方法来分析和解析表示合并黑洞双星发出的引力波信号的衰荡部分,与通常的多极复波形$h(t)$的准简正模和的{ \it线性}分解相比,我们的过程依赖于$h(t)$的{ \it乘法}分解作为基本准-正常模式,其振幅和相位分别拟合剩余的时间依赖性复因子。作为一个说明性的例子,我们应用我们的分析和拟合程序的振铃部分的一个样本的16个$\ell=m=2$等质量,旋转,nonprecessing,数值波形计算的SP $_{\rm E}$ C代码,现在公开的SXS目录。我们的方法产生了一个有效的和准确的方式来表示振铃波形,从而提供了一种新的方式来完成分析有效的单体吸气加暴跌波形。

英文摘要:

We propose a new way of analyzing, and analytically representing, the ringdown part of the gravitational wave signal emitted by coalescing black hole binaries.By contrast with the usual {\it linear} decomposition of the multipolar complex waveform $h(t)$ in a sum of quasi-normal modes, our procedure relies on a {\it multiplicative} decomposition of $h(t)$ as the product of the fundamental quasi-normal mode with a remaining time-dependent complex factor whose amplitude and phase are separately fitted. As an illustrative example, we apply our analysis and fitting procedure to the ringdown part of a sample of sixteen $\ell=m=2$ equal-mass, spinning, nonprecessing, numerical waveforms computed with the SP$_{\rm E}$C code,now publicly available in the SXS catalogue. Our approach yields an efficient and accurate way to represent the ringdown waveform, thereby offering a new way to complete the analytical effective-one-body inspiral-plus-plunge waveform.

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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