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arXiv 0712.3787gr-qc
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旋转双星数值相对论和后牛顿波形之间的比较:轨道悬挂情况

Comparison between numerical-relativity and post-Newtonian waveforms from spinning binaries: the orbital hang-up case

Mark Hannam, Sascha Husa, Bernd Brügmann, Achamveedu Gopakumar

摘要:

我们比较的结果从数值模拟的自旋二进制的“轨道悬挂”的情况下,二进制完成至少9个轨道合并前,与后牛顿的结果使用近似泰勒T1,T4和Et。我们发现,在引力波频率达到$Mω= 0.1$之前的10个周期内,NR和2.5PN结果之间的累积相位差小于3弧度,当使用3.5PN结果时小于2.5弧度。随着黑洞自旋的增加,NR结果和限制PN结果之间的振幅不一致性增加,从等质量情况下的约6%增加到黑洞自旋为$S_i/M_i^2 = 0.85$时的12%。最后,我们的结果表明,合并波形将发挥重要作用,估计自旋从这样的inspiral波形。

英文摘要:

We compare results from numerical simulations of spinning binaries in the "orbital hangup" case, where the binary completes at least nine orbits before merger, with post-Newtonian results using the approximants TaylorT1, T4 and Et. We find that, over the ten cycles before the gravitational-wave frequency reaches $Mω= 0.1$, the accumulated phase disagreement between NR and 2.5PN results is less than three radians, and is less than 2.5 radians when using 3.5PN results. The amplitude disagreement between NR and restricted PN results increases with the black holes' spin, from about 6% in the equal-mass case to 12% when the black holes' spins are $S_i/M_i^2 = 0.85$. Finally, our results suggest that the merger waveform will play an important role in estimating the spin from such inspiral waveforms.

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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