Constraining the equation of state in neutron-star cores via the long-ringdown signal
Abstract Multimessenger signals from binary neutron star (BNS) mergers are promising tools to infer the properties of nuclear matter at densities inaccessible to laboratory experiments. Gravitational waves (GWs) from BNS merger remnants can constrain the neutron-star equation of state (EOS) compleme...
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| Format: | Article |
| Language: | English |
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Nature Portfolio
2025-02-01
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| Series: | Nature Communications |
| Online Access: | https://doi.org/10.1038/s41467-025-56500-x |
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| _version_ | 1823861789495918592 |
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| author | Christian Ecker Tyler Gorda Aleksi Kurkela Luciano Rezzolla |
| author_facet | Christian Ecker Tyler Gorda Aleksi Kurkela Luciano Rezzolla |
| author_sort | Christian Ecker |
| collection | DOAJ |
| description | Abstract Multimessenger signals from binary neutron star (BNS) mergers are promising tools to infer the properties of nuclear matter at densities inaccessible to laboratory experiments. Gravitational waves (GWs) from BNS merger remnants can constrain the neutron-star equation of state (EOS) complementing constraints from late inspiral, direct mass-radius measurements, and ab-initio calculations. We perform a series of general-relativistic simulations of BNS systems with EOSs constructed to comprehensively cover the high-density regime. We identify a tight correlation between the ratio of the energy and angular-momentum losses in the late-time portion of the post-merger signal, called the long ringdown, and the EOS at the highest pressures and densities in neutron-star cores. Applying this correlation to post-merger GW signals significantly reduces EOS uncertainty at densities several times the nuclear saturation density, where no direct constraints are currently available. Hence, the long ringdown can provide stringent constraints on material properties of neutron stars cores. |
| format | Article |
| id | doaj-art-2c58407276934b528edcb2fe51c0c220 |
| institution | Kabale University |
| issn | 2041-1723 |
| language | English |
| publishDate | 2025-02-01 |
| publisher | Nature Portfolio |
| record_format | Article |
| series | Nature Communications |
| spelling | doaj-art-2c58407276934b528edcb2fe51c0c2202025-02-09T12:44:08ZengNature PortfolioNature Communications2041-17232025-02-011611910.1038/s41467-025-56500-xConstraining the equation of state in neutron-star cores via the long-ringdown signalChristian Ecker0Tyler Gorda1Aleksi Kurkela2Luciano Rezzolla3Institut für Theoretische Physik, Goethe UniversitätInstitut für Theoretische Physik, Goethe UniversitätFaculty of Science and Technology, University of StavangerInstitut für Theoretische Physik, Goethe UniversitätAbstract Multimessenger signals from binary neutron star (BNS) mergers are promising tools to infer the properties of nuclear matter at densities inaccessible to laboratory experiments. Gravitational waves (GWs) from BNS merger remnants can constrain the neutron-star equation of state (EOS) complementing constraints from late inspiral, direct mass-radius measurements, and ab-initio calculations. We perform a series of general-relativistic simulations of BNS systems with EOSs constructed to comprehensively cover the high-density regime. We identify a tight correlation between the ratio of the energy and angular-momentum losses in the late-time portion of the post-merger signal, called the long ringdown, and the EOS at the highest pressures and densities in neutron-star cores. Applying this correlation to post-merger GW signals significantly reduces EOS uncertainty at densities several times the nuclear saturation density, where no direct constraints are currently available. Hence, the long ringdown can provide stringent constraints on material properties of neutron stars cores.https://doi.org/10.1038/s41467-025-56500-x |
| spellingShingle | Christian Ecker Tyler Gorda Aleksi Kurkela Luciano Rezzolla Constraining the equation of state in neutron-star cores via the long-ringdown signal Nature Communications |
| title | Constraining the equation of state in neutron-star cores via the long-ringdown signal |
| title_full | Constraining the equation of state in neutron-star cores via the long-ringdown signal |
| title_fullStr | Constraining the equation of state in neutron-star cores via the long-ringdown signal |
| title_full_unstemmed | Constraining the equation of state in neutron-star cores via the long-ringdown signal |
| title_short | Constraining the equation of state in neutron-star cores via the long-ringdown signal |
| title_sort | constraining the equation of state in neutron star cores via the long ringdown signal |
| url | https://doi.org/10.1038/s41467-025-56500-x |
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