Accessing universal relations of binary neutron star waveforms in massive scalar-tensor theory
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| Main Authors: | , , , , , |
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| Format: | Preprint |
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2024
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| _version_ | 1866909331289538560 |
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| author | Lam, Alan Tsz-Lok Gao, Yong Kuan, Hao-Jui Shibata, Masaru Van Aelst, Karim Kiuchi, Kenta |
| author_facet | Lam, Alan Tsz-Lok Gao, Yong Kuan, Hao-Jui Shibata, Masaru Van Aelst, Karim Kiuchi, Kenta |
| contents | We investigate how the quasi-universal relations connecting tidal deformability with gravitational waveform characteristics and/or properties of individual neutron stars that were proposed in the literature within general relativity would be influenced in the massive Damour-Esposito-Farese-type scalar-tensor gravity. For this purpose, we systematically perform numerical relativity simulations of ~120 binary neutron star mergers with varying scalar coupling constants. Although only three neutron-star equations of state are adopted, a clear breach of universality can be observed in the data sets. In addition to presenting difficulties in constructing quasi-universal relations in alternative gravity theories, we also briefly compare the impacts of non-general-relativity physics on the waveform features and those due to the first order or cross-over quantum chromodynamical phase transition. |
| format | Preprint |
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arxiv_https___arxiv_org_abs_2410_00137 |
| institution | arXiv |
| publishDate | 2024 |
| record_format | arxiv |
| spellingShingle | Accessing universal relations of binary neutron star waveforms in massive scalar-tensor theory Lam, Alan Tsz-Lok Gao, Yong Kuan, Hao-Jui Shibata, Masaru Van Aelst, Karim Kiuchi, Kenta High Energy Astrophysical Phenomena General Relativity and Quantum Cosmology Nuclear Theory We investigate how the quasi-universal relations connecting tidal deformability with gravitational waveform characteristics and/or properties of individual neutron stars that were proposed in the literature within general relativity would be influenced in the massive Damour-Esposito-Farese-type scalar-tensor gravity. For this purpose, we systematically perform numerical relativity simulations of ~120 binary neutron star mergers with varying scalar coupling constants. Although only three neutron-star equations of state are adopted, a clear breach of universality can be observed in the data sets. In addition to presenting difficulties in constructing quasi-universal relations in alternative gravity theories, we also briefly compare the impacts of non-general-relativity physics on the waveform features and those due to the first order or cross-over quantum chromodynamical phase transition. |
| title | Accessing universal relations of binary neutron star waveforms in massive scalar-tensor theory |
| topic | High Energy Astrophysical Phenomena General Relativity and Quantum Cosmology Nuclear Theory |
| url | https://arxiv.org/abs/2410.00137 |