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Published November 15, 2022 | Published
Journal Article Open

Surrogate model for gravitational wave signals from nonspinning, comparable-to large-mass-ratio black hole binaries built on black hole perturbation theory waveforms calibrated to numerical relativity

Abstract

We present a reduced-order surrogate model of gravitational waveforms from nonspinning binary black hole systems with comparable to large mass-ratio configurations. This surrogate model, BHPTNRSur1dq1e4, is trained on waveform data generated by point-particle black hole perturbation theory (ppBHPT) with mass ratios varying from 2.5 to 10,000. BHPTNRSur1dq1e4 extends an earlier waveform model, EMRISur1dq1e4, by using an updated transition-to-plunge model, covering longer durations up to 30,500 m₁ (where m₁ is the mass of the primary black hole), includes several more spherical harmonic modes up to ℓ = 10 , and calibrates subdominant modes to numerical relativity (NR) data. In the comparable mass-ratio regime, including mass ratios as low as 2.5, the gravitational waveforms generated through ppBHPT agree surprisingly well with those from NR after this simple calibration step. We also compare our model to recent SXS and RIT NR simulations at mass ratios ranging from 15 to 32, and find the dominant quadrupolar modes agree to better than ≈ 10⁻³. We expect our model to be useful to study intermediate-mass-ratio binary systems in current and future gravitational-wave detectors.

Additional Information

© 2022 American Physical Society. We thank Keigan Cullen and Nur Rifat for insightful comments and discussions on this project. The authors acknowledge support from NSF Grants No. PHY-2106755 (G.K), No. PHY-1806665 (T. I. and S.F), No. PHY-1912081 (M. G. and L. E.K), No. OAC-1931280 (M. G. and L. E.K), and No. DMS-1912716 (T. I., S.F, and G.K). Part of this work is additionally supported by the Heising-Simons Foundation, the Simons Foundation, and NSF Grants No. PHY-1748958. This project has received funding from the European Union's Horizon 2020 research and innovation program under the Marie Skłodowska-Curie grant agreement No. 896869. V. V. is a Marie Curie Fellow. Simulations were performed on CARNiE at the Center for Scientific Computing and Visualization Research (CSCVR) of UMassD, which is supported by the DURIP Grant No. N00014181255, the MIT Lincoln Labs SuperCloud GPU supercomputer supported by the Massachusetts Green High Performance Computing Center (MGHPCC) and ORNL SUMMIT under allocation AST166.

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Published - PhysRevD.106.104025.pdf

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Additional details

Created:
August 20, 2023
Modified:
October 23, 2023