Robust and fast parameter estimation for gravitational waves from binary neutron star merger remnants
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| Main Authors: | , , , , |
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| Format: | Preprint |
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2025
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| _version_ | 1866908756036550656 |
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| author | Vretinaris, Stamatis Vretinaris, Georgios Mermigkas, Christos Karamanis, Minas Stergioulas, Nikolaos |
| author_facet | Vretinaris, Stamatis Vretinaris, Georgios Mermigkas, Christos Karamanis, Minas Stergioulas, Nikolaos |
| contents | We present a robust and efficient methodology for parameter estimation of gravitational waves generated during the post-merger phase of binary neutron star mergers. Our approach leverages an analytic waveform model combined with empirical relations to predict prior ranges for the post-merger frequencies based on measurements of the chirp mass and effective tidal deformability in the inspiral phase. This enables robust inference of the main features of the post-merger spectrum, avoiding possible multi-modality induced by wide priors. Using waveforms derived from numerical relativity, we systematically validate our model across a broad spectrum of neutron star equations of state and mass configurations, demonstrating high fitting factors. Our method can be applied in future detections of gravitational waves from the post-merger phase with third-generation gravitational wave observatories. Furthermore, by integrating the Preconditioned Monte Carlo sampling method within the pocoMC framework, we achieve substantial computational acceleration compared to conventional Bayesian techniques. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2501_11518 |
| institution | arXiv |
| publishDate | 2025 |
| record_format | arxiv |
| spellingShingle | Robust and fast parameter estimation for gravitational waves from binary neutron star merger remnants Vretinaris, Stamatis Vretinaris, Georgios Mermigkas, Christos Karamanis, Minas Stergioulas, Nikolaos General Relativity and Quantum Cosmology We present a robust and efficient methodology for parameter estimation of gravitational waves generated during the post-merger phase of binary neutron star mergers. Our approach leverages an analytic waveform model combined with empirical relations to predict prior ranges for the post-merger frequencies based on measurements of the chirp mass and effective tidal deformability in the inspiral phase. This enables robust inference of the main features of the post-merger spectrum, avoiding possible multi-modality induced by wide priors. Using waveforms derived from numerical relativity, we systematically validate our model across a broad spectrum of neutron star equations of state and mass configurations, demonstrating high fitting factors. Our method can be applied in future detections of gravitational waves from the post-merger phase with third-generation gravitational wave observatories. Furthermore, by integrating the Preconditioned Monte Carlo sampling method within the pocoMC framework, we achieve substantial computational acceleration compared to conventional Bayesian techniques. |
| title | Robust and fast parameter estimation for gravitational waves from binary neutron star merger remnants |
| topic | General Relativity and Quantum Cosmology |
| url | https://arxiv.org/abs/2501.11518 |