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arXiv 0802.1249gr-qc
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准圆轨道上旋进紧双星的第三后牛顿引力波偏振和球谐模

The third post-Newtonian gravitational wave polarisations and associated spherical harmonic modes for inspiralling compact binaries in quasi-circular orbits

Luc Blanchet, Guillaume Faye, Bala R. Iyer, Siddhartha Sinha

摘要:

在广义相对论的第三次后牛顿近似下,计算了在准圆轨道上运动的致密双星的引力波形。我们的动机是双重的:(i)为激光干涉探测器中的引力波内旋信号的数据分析提供准确的模板;(ii)提供相关的自旋加权球谐分解,以便于将内旋波形的高后牛顿预测与合并和衰荡的数值生成波形进行比较和匹配。这种扩展的GWF的一半PN顺序(相对于以前的工作在2.5PN顺序)是基于多极后闵可夫斯基形式主义的算法,并要求计算的辐射,正则和源多极矩之间的关系,一般源在3 PN顺序。我们还获得了3 PN扩展的源多极矩的情况下,紧凑的二进制文件,并计算的贡献的遗传条款(尾巴,尾巴的尾巴和记忆积分)的3 PN顺序。最终结果给出了完整的正和交叉极化和单独的自旋加权球谐模。

英文摘要:

The gravitational waveform (GWF) generated by inspiralling compact binaries moving in quasi-circular orbits is computed at the third post-Newtonian (3PN) approximation to general relativity. Our motivation is two-fold: (i) To provide accurate templates for the data analysis of gravitational wave inspiral signals in laser interferometric detectors; (ii) To provide the associated spin-weighted spherical harmonic decomposition to facilitate comparison and match of the high post-Newtonian prediction for the inspiral waveform to the numerically-generated waveforms for the merger and ringdown. This extension of the GWF by half a PN order (with respect to previous work at 2.5PN order) is based on the algorithm of the multipolar post-Minkowskian formalism, and mandates the computation of the relations between the radiative, canonical and source multipole moments for general sources at 3PN order. We also obtain the 3PN extension of the source multipole moments in the case of compact binaries, and compute the contributions of hereditary terms (tails, tails-of-tails and memory integrals) up to 3PN order. The end results are given for both the complete plus and cross polarizations and the separate spin-weighted spherical harmonic modes.

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