Shedding Light on the EOS-Gravity Degeneracy and Constraining the Nuclear Symmetry Energy from the Gravitational Binding Energy of Neutron Stars
A thorough understanding of properties of neutron stars requires both a reliable knowledge of the equation of state (EOS) of super-dense nuclear matter and the strong-field gravity theories simultaneously. To provide information that may help break this EOS-gravity degeneracy, we investigate effects...
| Main Authors: | , , , |
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| Format: | Article |
| Language: | English |
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EDP Sciences
2016-01-01
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| Series: | EPJ Web of Conferences |
| Online Access: | http://dx.doi.org/10.1051/epjconf/201610907002 |
| _version_ | 1819018912302366720 |
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| author | He Xiao-Tao Fattoyev F. J. Li Bao-An Newton W. G. |
| author_facet | He Xiao-Tao Fattoyev F. J. Li Bao-An Newton W. G. |
| author_sort | He Xiao-Tao |
| collection | DOAJ |
| description | A thorough understanding of properties of neutron stars requires both a reliable knowledge of the equation of state (EOS) of super-dense nuclear matter and the strong-field gravity theories simultaneously. To provide information that may help break this EOS-gravity degeneracy, we investigate effects of nuclear symmetry energy on the gravitational binding energy of neutron stars within GR and the scalar-tensor subset of alternative gravity models. We focus on effects of the slope L of nuclear symmetry energy at saturation density and the high-density behavior of nuclear symmetry energy. We find that the variation of either the density slope L or the high-density behavior of nuclear symmetry energy leads to large changes in the binding energy of neutron stars. The difference in predictions using the GR and the scalar-tensor theory appears only for massive neutron stars, and even then is significantly smaller than the difference resulting from variations in the symmetry energy. |
| first_indexed | 2024-12-21T03:26:57Z |
| format | Article |
| id | doaj.art-38d98fed4b8f4de5a85e6705b2d1ca58 |
| institution | Directory Open Access Journal |
| issn | 2100-014X |
| language | English |
| last_indexed | 2024-12-21T03:26:57Z |
| publishDate | 2016-01-01 |
| publisher | EDP Sciences |
| record_format | Article |
| series | EPJ Web of Conferences |
| spelling | doaj.art-38d98fed4b8f4de5a85e6705b2d1ca582022-12-21T19:17:34ZengEDP SciencesEPJ Web of Conferences2100-014X2016-01-011090700210.1051/epjconf/201610907002epjconf_omeg2016_07002Shedding Light on the EOS-Gravity Degeneracy and Constraining the Nuclear Symmetry Energy from the Gravitational Binding Energy of Neutron StarsHe Xiao-TaoFattoyev F. J.Li Bao-An0Newton W. G.1Department of Physics and Astronomy, Texas A&M University-Commerce, CommerceDepartment of Physics and Astronomy, Texas A&M University-Commerce, CommerceA thorough understanding of properties of neutron stars requires both a reliable knowledge of the equation of state (EOS) of super-dense nuclear matter and the strong-field gravity theories simultaneously. To provide information that may help break this EOS-gravity degeneracy, we investigate effects of nuclear symmetry energy on the gravitational binding energy of neutron stars within GR and the scalar-tensor subset of alternative gravity models. We focus on effects of the slope L of nuclear symmetry energy at saturation density and the high-density behavior of nuclear symmetry energy. We find that the variation of either the density slope L or the high-density behavior of nuclear symmetry energy leads to large changes in the binding energy of neutron stars. The difference in predictions using the GR and the scalar-tensor theory appears only for massive neutron stars, and even then is significantly smaller than the difference resulting from variations in the symmetry energy.http://dx.doi.org/10.1051/epjconf/201610907002 |
| spellingShingle | He Xiao-Tao Fattoyev F. J. Li Bao-An Newton W. G. Shedding Light on the EOS-Gravity Degeneracy and Constraining the Nuclear Symmetry Energy from the Gravitational Binding Energy of Neutron Stars EPJ Web of Conferences |
| title | Shedding Light on the EOS-Gravity Degeneracy and Constraining the Nuclear Symmetry Energy from the Gravitational Binding Energy of Neutron Stars |
| title_full | Shedding Light on the EOS-Gravity Degeneracy and Constraining the Nuclear Symmetry Energy from the Gravitational Binding Energy of Neutron Stars |
| title_fullStr | Shedding Light on the EOS-Gravity Degeneracy and Constraining the Nuclear Symmetry Energy from the Gravitational Binding Energy of Neutron Stars |
| title_full_unstemmed | Shedding Light on the EOS-Gravity Degeneracy and Constraining the Nuclear Symmetry Energy from the Gravitational Binding Energy of Neutron Stars |
| title_short | Shedding Light on the EOS-Gravity Degeneracy and Constraining the Nuclear Symmetry Energy from the Gravitational Binding Energy of Neutron Stars |
| title_sort | shedding light on the eos gravity degeneracy and constraining the nuclear symmetry energy from the gravitational binding energy of neutron stars |
| url | http://dx.doi.org/10.1051/epjconf/201610907002 |
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