Surrogate model for gravitational wave signals from comparable and large-mass-ratio black hole binaries
Surrogate model for gravitational wave signals from comparable and large-mass-ratio black hole binaries
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来自可比和大质量比黑洞双星的引力波信号的替代模型
DOI:
10.1103/physrevd.101.081502
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发表时间:
2020
影响因子:
5
通讯作者:
Varma, Vijay
中科院分区:
文献类型:
--
作者:
Rifat, Nur E. M.;Field, Scott E.;Khanna, Gaurav;Varma, Vijay
Gravitational wave signals from compact astrophysical sources such as those observed by LIGO and Virgo require a high-accuracy, theory-based waveform model for the analysis of the recorded signal. Current inspiral-merger-ringdown models are calibrated only up to moderate mass ratios, thereby limiting their applicability to signals from high-mass-ratio binary systems. We presentEMRISur1dq1e4, a reduced-order surrogate model for gravitational waveforms ofin duration and including several harmonic modes for nonspinning black hole binary systems with mass ratios varying from 3 to 10000, thus vastly expanding the parameter range beyond the current models. This surrogate model is trained on waveform data generated by point-particle black hole perturbation theory (ppBHPT) both for large-mass-ratio and comparable mass-ratio binaries. We observe that the gravitational waveforms generated through a simple application of ppBHPT to the comparable mass-ratio cases agree surprisingly well with those from full numerical relativity after a rescaling of the ppBHPT’s total mass parameter. This observation and theEMRISur1dq1e4surrogate model will enable data analysis studies in the high-mass-ratio regime, including potential intermediate-mass-ratio signals from LIGO/Virgo and extreme-mass-ratio events of interest to the future space-based observatory LISA.
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影响因子:
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DOI:
--
发表时间:
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期刊:
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