Comparison of post-Newtonian mode amplitudes with numerical relativity simulations of binary black holes
Comparison of post-Newtonian mode amplitudes with numerical relativity simulations of binary black holes
复制标题
后牛顿模式振幅与双黑洞数值相对论模拟的比较
DOI:
10.1088/1361-6382/ab6a21
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发表时间:
2020
影响因子:
3.5
通讯作者:
Sathyaprakash, B S
中科院分区:
文献类型:
--
作者:
Borhanian, S;Arun, K G;Pfeiffer, H P;Sathyaprakash, B S
Gravitational waves from the coalescence of two black holes carry the signature of the strong field dynamics of binary black holes. In this work we have used numerical relativity simulations and post-Newtonian theory to investigate this dynamics. Post-Newtonian theory is a low-velocity expansion that assumes the companion bodies to be point-particles, while numerical relativity treats black holes as extended objects with horizons and fully captures their dynamics. There is a priori no reason for the waveforms computed using these disparate methods to agree with each other, especially at late times when the black holes move close to the speed of light. We find, remarkably, that the leading order amplitudes in post-Newtonian theory agree well with the full general relativity solution for a large set of spherical harmonic modes, even in the most dynamical part of the binary evolution, with only some modes showing distinctly different behavior than that found by numerical relativity simulations. In particular, modes with spherical harmonic indices as well as are least modified from their dominant post-Newtonian behavior. Understanding the nature of these modes in terms of the post-Newtonian description will aid in formulating better models of the emitted waveforms in the strong field regime of the dynamics.
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影响因子:
5
作者:
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通讯作者:
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作者:
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DOI:
--
发表时间:
2012
期刊:
影响因子:
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作者:
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5
作者:
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通讯作者:
H. Pfeiffer
DOI:
--
发表时间:
2007
期刊:
影响因子:
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作者:
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通讯作者:
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