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arXiv · 2104.03789

A surrogate model for gravitational waveforms of spin-aligned binary black holes with eccentricities

Qianyun Yun·Wen-Biao Han·Xingyu Zhong·Carlos A. Benavides-Gallego
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Abstract

A waveform model for the eccentric binary black holes named SEOBNRE has been used to analyze the LIGO-Virgo's gravitational wave data by several groups. The accuracy of this model has been validated by comparing it with numerical relativity. However, SEOBNRE is a time-domain model, and the efficiency for generating waveforms is a bottleneck in data analysis. To overcome this disadvantage, we offer a reduced-order surrogate model for eccentric binary black holes based on the SEOBNRE waveforms. This surrogate model (SEOBNRE\_S) can simulate the complete inspiral-merger-ringdown waves with enough accuracy, covering eccentricities from 0 to 0.25 (0.1), and mass ratio from 1:1 to 5:1 (2:1) for nonspinning (spinning) binaries. The speed of waveform generation is accelerated about $10^2 \sim 10^3$ times than the original SEOBNRE model. Therefore SEOBNRE\_S could be helpful in the analysis of LIGO data to find potential eccentricities.

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Qianyun Yun, Wen-Biao Han, Xingyu Zhong, Carlos A. Benavides-Gallego. 2021-04-08. A surrogate model for gravitational waveforms of spin-aligned binary black holes with eccentricities. https://doi.org/10.1103/physrevd.103.124053

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