Fast frequency-domain gravitational waveforms for precessing binaries with a new twist
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| Main Authors: | , , , , |
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| Format: | Preprint |
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2024
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| _version_ | 1866929644376162304 |
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| author | Colleoni, Marta Vidal, Felip A. Ramis García-Quirós, Cecilio Akçay, Sarp Bera, Sayantani |
| author_facet | Colleoni, Marta Vidal, Felip A. Ramis García-Quirós, Cecilio Akçay, Sarp Bera, Sayantani |
| contents | Gravitational waveform (GW) models are a core ingredient for the analysis of compact binary mergers observed by current ground-based interferometers. We focus here on a specific class of such models known as PhenomX, which has gained popularity in recent years thanks to its computational efficiency. We introduce a new description of the ``twisting-up'' mapping underpinning the construction of precessing waveforms within this family. The new description is an adaptation to the frequency domain of a technique previously implemented in time-domain models, where the orbit-averaged post-Newtonian spin-precession dynamics is numerically solved on the fly. We also present an improved version of the gravitational-wave strain amplitudes approximating the signal in the co-precessing frame. We demonstrate that the new description yields improved matches against numerical relativity simulations, with only a modest computational overhead. We also show that the new model can be reliably employed in parameter estimation follow-ups of GW events, returning equivalent or more stringent measurements of the source properties compared to its predecessor. |
| format | Preprint |
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arxiv_https___arxiv_org_abs_2412_16721 |
| institution | arXiv |
| publishDate | 2024 |
| record_format | arxiv |
| spellingShingle | Fast frequency-domain gravitational waveforms for precessing binaries with a new twist Colleoni, Marta Vidal, Felip A. Ramis García-Quirós, Cecilio Akçay, Sarp Bera, Sayantani General Relativity and Quantum Cosmology High Energy Astrophysical Phenomena Instrumentation and Methods for Astrophysics Gravitational waveform (GW) models are a core ingredient for the analysis of compact binary mergers observed by current ground-based interferometers. We focus here on a specific class of such models known as PhenomX, which has gained popularity in recent years thanks to its computational efficiency. We introduce a new description of the ``twisting-up'' mapping underpinning the construction of precessing waveforms within this family. The new description is an adaptation to the frequency domain of a technique previously implemented in time-domain models, where the orbit-averaged post-Newtonian spin-precession dynamics is numerically solved on the fly. We also present an improved version of the gravitational-wave strain amplitudes approximating the signal in the co-precessing frame. We demonstrate that the new description yields improved matches against numerical relativity simulations, with only a modest computational overhead. We also show that the new model can be reliably employed in parameter estimation follow-ups of GW events, returning equivalent or more stringent measurements of the source properties compared to its predecessor. |
| title | Fast frequency-domain gravitational waveforms for precessing binaries with a new twist |
| topic | General Relativity and Quantum Cosmology High Energy Astrophysical Phenomena Instrumentation and Methods for Astrophysics |
| url | https://arxiv.org/abs/2412.16721 |