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- W4383860475 abstract "Numerical-relativity surrogate models for both black-hole merger waveforms and remnants have emerged as important tools in gravitational-wave astronomy. While producing very accurate predictions, their applicability is limited to the region of the parameter space where numerical-relativity simulations are available and computationally feasible. Notably, this excludes extreme mass ratios. We present a machine-learning approach to extend the validity of existing and future numerical-relativity surrogate models toward the test-particle limit, targeting in particular the mass and spin of post-merger black-hole remnants. Our model is trained on both numerical-relativity simulations at comparable masses and analytical predictions at extreme mass ratios. We extend the gaussian-process-regression model NRSur7dq4Remnant, validate its performance via cross validation, and test its accuracy against additional numerical-relativity runs. Our fit, which we dub NRSur7dq4EmriRemnant, reaches an accuracy that is comparable to or higher than that of existing remnant models while providing robust predictions for arbitrary mass ratios." @default.
- W4383860475 created "2023-07-11" @default.
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- W4383860475 date "2023-07-07" @default.
- W4383860475 modified "2023-10-11" @default.
- W4383860475 title "Extending black-hole remnant surrogate models to extreme mass ratios" @default.
- W4383860475 doi "https://doi.org/10.48550/arxiv.2307.03435" @default.
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