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 (where is the mass of the primary black hole), includes several more spherical harmonic modes up to , 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 . We expect our model to be useful to study intermediate-mass-ratio binary systems in current and future gravitational-wave detectors.
8 More- Received 10 April 2022
- Accepted 10 October 2022
DOI:https://doi.org/10.1103/PhysRevD.106.104025
© 2022 American Physical Society