Measuring the nuclear equation of state with neutron star-black hole mergers
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arXiv
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| Format: | Preprint |
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2023
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| author | Sarin, Nikhil Peiris, Hiranya V. Mortlock, Daniel J. Alsing, Justin Nissanke, Samaya M. Feeney, Stephen M. |
| author_facet | Sarin, Nikhil Peiris, Hiranya V. Mortlock, Daniel J. Alsing, Justin Nissanke, Samaya M. Feeney, Stephen M. |
| contents | Gravitational-wave (GW) observations of neutron star-black hole (NSBH) mergers are sensitive to the nuclear equation of state (EOS). We present a new methodology for EOS inference with non-parametric Gaussian process (GP) priors, enabling direct constraints on the pressure at specific densities and the length-scale of correlations on the EOS. Using realistic simulations of NSBH mergers, incorporating both GW and electromagnetic (EM) selection to ensure sample purity, we find that a GW detector network operating at O5-sensitivities will constrain the radius of a $\unit[1.4]{M_{\odot}}$ NS and the maximum NS mass with $1.6\%$ and $13\%$ precision, respectively. With the same sample, the projected constraint on the length-scale of correlations in the EOS is $\geq~\unit[3.2]{MeV~fm^{-3}}$. These results demonstrate strong potential for insights into the nuclear EOS from NSBH systems, provided they are robustly identified. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2311_05689 |
| institution | arXiv |
| publishDate | 2023 |
| record_format | arxiv |
| spellingShingle | Measuring the nuclear equation of state with neutron star-black hole mergers Sarin, Nikhil Peiris, Hiranya V. Mortlock, Daniel J. Alsing, Justin Nissanke, Samaya M. Feeney, Stephen M. General Relativity and Quantum Cosmology High Energy Astrophysical Phenomena Gravitational-wave (GW) observations of neutron star-black hole (NSBH) mergers are sensitive to the nuclear equation of state (EOS). We present a new methodology for EOS inference with non-parametric Gaussian process (GP) priors, enabling direct constraints on the pressure at specific densities and the length-scale of correlations on the EOS. Using realistic simulations of NSBH mergers, incorporating both GW and electromagnetic (EM) selection to ensure sample purity, we find that a GW detector network operating at O5-sensitivities will constrain the radius of a $\unit[1.4]{M_{\odot}}$ NS and the maximum NS mass with $1.6\%$ and $13\%$ precision, respectively. With the same sample, the projected constraint on the length-scale of correlations in the EOS is $\geq~\unit[3.2]{MeV~fm^{-3}}$. These results demonstrate strong potential for insights into the nuclear EOS from NSBH systems, provided they are robustly identified. |
| title | Measuring the nuclear equation of state with neutron star-black hole mergers |
| topic | General Relativity and Quantum Cosmology High Energy Astrophysical Phenomena |
| url | https://arxiv.org/abs/2311.05689 |