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arXiv 1111.2701gr-qc
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准圆轨道中吸入致密双星的2.5PN线性动量通量和相关反冲:非自旋情况

The 2.5PN linear momentum flux and associated recoil from inspiralling compact binaries in quasi-circular orbits: Nonspinning case

Chandra Kant Mishra, K. G. Arun, Bala R. Iyer

摘要:

螺旋压缩双星的各向异性引力波(GW)发射导致线性动量的损失,从而导致系统的引力反冲。本文在2.5后牛顿(PN)阶下研究了源(准圆轨道上的非自旋黑洞双星系统)远区的线动量损失率,并给出了该双星系统在螺旋相中积累的2.5PN精确反冲速度的调和坐标解析表达式。我们发现,对于对称质量比为ν~0.2的双星,反冲速度在螺旋相结束时(即最内层稳定圆轨道(ISCO))最大,约为~4.58 km/s。超越inspiral,我们还提供了一个更重要的贡献,从暴跌阶段的反冲速度的估计。同样,在坍缩结束时的反冲速度,包括螺旋和坍缩阶段的贡献,对于ν~0.2的双星是最大的,大约为~180 km/s。

英文摘要:

Anisotropic emission of gravitational waves (GWs) from inspiralling compact binaries leads to the loss of linear momentum and hence gravitational recoil of the system. The loss rate of linear momentum in the far-zone of the source (a nonspinning binary system of black holes in quasicircular orbit) is investigated at the 2.5 post-Newtonian (PN) order and used to provide an analytical expression in harmonic coordinates for the 2.5PN accurate recoil velocity of the binary accumulated in the inspiral phase. We find that the recoil velocity at the end of the inspiral phase (i.e at the innermost stable circular orbit (ISCO)) is maximum for a binary with symmetric mass ratio of ν~0.2 and is roughly about ~4.58 km/s. Going beyond inspiral, we also provide an estimate of the more important contribution to the recoil velocity from the plunge phase. Again the recoil velocity at the end of the plunge, involving contributions both from inspiral and plunge phase, is maximum for a binary with ν~0.2 and is of the order of ~180 km/s.

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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