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Effects of Symmetry Energy on the Equation of State for Simulations of Core-collapse Supernovae and Neutron-star Mergers
We construct a new equation of state (EOS) for numerical simulations of core-collapse supernovae and neutron-star mergers based on an extended relativistic mean-field model with a small symmetry energy slope L, which is compatible with both experimental nuclear data and recent observations of neutro...
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Published in: | The Astrophysical journal 2020-03, Vol.891 (2), p.148 |
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creator | Shen, Hong Ji, Fan Hu, Jinniu Sumiyoshi, Kohsuke |
description | We construct a new equation of state (EOS) for numerical simulations of core-collapse supernovae and neutron-star mergers based on an extended relativistic mean-field model with a small symmetry energy slope L, which is compatible with both experimental nuclear data and recent observations of neutron stars. The new EOS table (EOS4) based on the extended TM1 (TM1e) model with L = 40 MeV is designed in the same tabular form and compared with the commonly used Shen EOS (EOS2) based on the original TM1 model with . This is convenient and useful for performing numerical simulations and examining the influences of symmetry energy and its density dependence on astrophysical phenomena. In comparison with the TM1 model used in EOS2, the TM1e model provides a similar maximum neutron-star mass but smaller radius and tidal deformability for a 1.4M neutron star, which is more consistent with current constraints. By comparing the phase diagram and thermodynamic quantities between EOS4 and EOS2, it is found that the TM1e model predicts a relatively larger region of nonuniform matter and softer EOS for neutron-rich matter. Significant differences between EOS4 and EOS2 are observed in the case with low proton fraction, while the properties of symmetric matter remain unchanged. |
doi_str_mv | 10.3847/1538-4357/ab72fd |
format | article |
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The new EOS table (EOS4) based on the extended TM1 (TM1e) model with L = 40 MeV is designed in the same tabular form and compared with the commonly used Shen EOS (EOS2) based on the original TM1 model with . This is convenient and useful for performing numerical simulations and examining the influences of symmetry energy and its density dependence on astrophysical phenomena. In comparison with the TM1 model used in EOS2, the TM1e model provides a similar maximum neutron-star mass but smaller radius and tidal deformability for a 1.4M neutron star, which is more consistent with current constraints. By comparing the phase diagram and thermodynamic quantities between EOS4 and EOS2, it is found that the TM1e model predicts a relatively larger region of nonuniform matter and softer EOS for neutron-rich matter. Significant differences between EOS4 and EOS2 are observed in the case with low proton fraction, while the properties of symmetric matter remain unchanged.</description><identifier>ISSN: 0004-637X</identifier><identifier>EISSN: 1538-4357</identifier><identifier>DOI: 10.3847/1538-4357/ab72fd</identifier><language>eng</language><publisher>Philadelphia: The American Astronomical Society</publisher><subject>Astrophysics ; Compact objects ; Computer simulation ; Core-collapse supernovae ; Density dependence ; Equations of state ; Formability ; Mathematical models ; Neutron stars ; Neutrons ; Numerical simulations ; Phase diagrams ; Simulation ; Star mergers ; Stars & galaxies ; Supernovae ; Symmetry</subject><ispartof>The Astrophysical journal, 2020-03, Vol.891 (2), p.148</ispartof><rights>2020. The American Astronomical Society. 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By comparing the phase diagram and thermodynamic quantities between EOS4 and EOS2, it is found that the TM1e model predicts a relatively larger region of nonuniform matter and softer EOS for neutron-rich matter. Significant differences between EOS4 and EOS2 are observed in the case with low proton fraction, while the properties of symmetric matter remain unchanged.</description><subject>Astrophysics</subject><subject>Compact objects</subject><subject>Computer simulation</subject><subject>Core-collapse supernovae</subject><subject>Density dependence</subject><subject>Equations of state</subject><subject>Formability</subject><subject>Mathematical models</subject><subject>Neutron stars</subject><subject>Neutrons</subject><subject>Numerical simulations</subject><subject>Phase diagrams</subject><subject>Simulation</subject><subject>Star mergers</subject><subject>Stars & galaxies</subject><subject>Supernovae</subject><subject>Symmetry</subject><issn>0004-637X</issn><issn>1538-4357</issn><fulltext>true</fulltext><rsrctype>article</rsrctype><creationdate>2020</creationdate><recordtype>article</recordtype><recordid>eNp1kM1PhDAQxRujievq3WMTr-JCC205mg1-JKseVhNvpJSpsgGKbTHy3wuL0ZOnyZt5703yQ-g8Cq-oiPkqSqgIYprwlSw40eUBWvyuDtEiDMM4YJS_HqMT53aTJGm6QF-Z1qC8w0bj7dA04O2Asxbs24BNi_074Oyjl74axWTx0gPWxuJt1fT1fr_Pro2FQJm6lp0DvO07sK35lIBlW-JH6L01beC8tPhh7AbrTtGRlrWDs5-5RC832fP6Ltg83d6vrzeBiiPmgyJNiUpKLghEWjBWhAktFEtAxYJJVaaCaCYFLaPpXESUFVRQokQMLBaE0yW6mHs7az56cD7fmd6248ucUM55FKckHV3h7FLWOGdB552tGmmHPArziW8-wcwnmPnMd4xczpHKdH-d_9q_Ab0HfVQ</recordid><startdate>20200310</startdate><enddate>20200310</enddate><creator>Shen, Hong</creator><creator>Ji, Fan</creator><creator>Hu, Jinniu</creator><creator>Sumiyoshi, Kohsuke</creator><general>The American Astronomical Society</general><general>IOP Publishing</general><scope>AAYXX</scope><scope>CITATION</scope><scope>7TG</scope><scope>8FD</scope><scope>H8D</scope><scope>KL.</scope><scope>L7M</scope><orcidid>https://orcid.org/0000-0001-6044-252X</orcidid><orcidid>https://orcid.org/0000-0003-2717-9939</orcidid><orcidid>https://orcid.org/0000-0002-9224-9449</orcidid><orcidid>https://orcid.org/0000-0002-1709-0159</orcidid></search><sort><creationdate>20200310</creationdate><title>Effects of Symmetry Energy on the Equation of State for Simulations of Core-collapse Supernovae and Neutron-star Mergers</title><author>Shen, Hong ; Ji, Fan ; Hu, Jinniu ; Sumiyoshi, Kohsuke</author></sort><facets><frbrtype>5</frbrtype><frbrgroupid>cdi_FETCH-LOGICAL-c416t-b992c5d782e1f866b053bc65ec486acd982f6a83d11f86b136b3832c84e648273</frbrgroupid><rsrctype>articles</rsrctype><prefilter>articles</prefilter><language>eng</language><creationdate>2020</creationdate><topic>Astrophysics</topic><topic>Compact objects</topic><topic>Computer simulation</topic><topic>Core-collapse supernovae</topic><topic>Density dependence</topic><topic>Equations of state</topic><topic>Formability</topic><topic>Mathematical models</topic><topic>Neutron stars</topic><topic>Neutrons</topic><topic>Numerical simulations</topic><topic>Phase diagrams</topic><topic>Simulation</topic><topic>Star mergers</topic><topic>Stars & galaxies</topic><topic>Supernovae</topic><topic>Symmetry</topic><toplevel>peer_reviewed</toplevel><toplevel>online_resources</toplevel><creatorcontrib>Shen, Hong</creatorcontrib><creatorcontrib>Ji, Fan</creatorcontrib><creatorcontrib>Hu, Jinniu</creatorcontrib><creatorcontrib>Sumiyoshi, Kohsuke</creatorcontrib><collection>CrossRef</collection><collection>Meteorological & Geoastrophysical Abstracts</collection><collection>Technology Research Database</collection><collection>Aerospace Database</collection><collection>Meteorological & Geoastrophysical Abstracts - Academic</collection><collection>Advanced Technologies Database with Aerospace</collection><jtitle>The Astrophysical journal</jtitle></facets><delivery><delcategory>Remote Search Resource</delcategory><fulltext>fulltext</fulltext></delivery><addata><au>Shen, Hong</au><au>Ji, Fan</au><au>Hu, Jinniu</au><au>Sumiyoshi, Kohsuke</au><format>journal</format><genre>article</genre><ristype>JOUR</ristype><atitle>Effects of Symmetry Energy on the Equation of State for Simulations of Core-collapse Supernovae and Neutron-star Mergers</atitle><jtitle>The Astrophysical journal</jtitle><stitle>APJ</stitle><addtitle>Astrophys. 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subjects | Astrophysics Compact objects Computer simulation Core-collapse supernovae Density dependence Equations of state Formability Mathematical models Neutron stars Neutrons Numerical simulations Phase diagrams Simulation Star mergers Stars & galaxies Supernovae Symmetry |
title | Effects of Symmetry Energy on the Equation of State for Simulations of Core-collapse Supernovae and Neutron-star Mergers |
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