Computing Fast and Reliable Gravitational Waveforms of Binary Neutron Star Merger Remnants
| Autor: | Easter, Paul J., Lasky, Paul D., Casey, Andrew R., Rezzolla, Luciano, Takami, Kentaro |
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| Rok vydání: | 2018 |
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| Zdroj: | Phys. Rev. D 100, 043005 (2019) |
| Druh dokumentu: | Working Paper |
| DOI: | 10.1103/PhysRevD.100.043005 |
| Popis: | Gravitational waves have been detected from the inspiral of a binary neutron-star, GW170817, which allowed constraints to be placed on the neutron star equation of state. The equation of state can be further constrained if gravitational waves from a post-merger remnant are detected. Post-merger waveforms are currently generated by numerical-relativity simulations, which are computationally expensive. Here we introduce a hierarchical model trained on numerical-relativity simulations, which can generate reliable post-merger spectra in a fraction of a second. Our spectra have mean fitting factors of 0.95, which compares to fitting factors of 0.76 and 0.85 between different numerical-relativity codes that simulate the same physical system. This method is the first step towards generating large template banks of spectra for use in post-merger detection and parameter estimation. Comment: Submitted to PRL. 6 pages, 4 figures |
| Databáze: | arXiv |
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