Isospin Symmetry Breaking Effects on the Mass-Radius Relation of a Neutron Star
Isospin symmetry breaking effects on the mass-radius relation of a cold, non-accreting neutron star are studied on the basis of two Skyrme Energy Density Functionals (EDFs). One functional contains isospin symmetry breaking terms other than those typically included in Skyrme EDFs while its counterpa...
| Main Authors: | , , |
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| Format: | Article |
| Language: | English |
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MDPI AG
2021-01-01
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| Series: | Symmetry |
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| Online Access: | https://www.mdpi.com/2073-8994/13/1/144 |
| _version_ | 1797410832928210944 |
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| author | Giovanni Selva Xavier Roca-Maza Gianluca Colò |
| author_facet | Giovanni Selva Xavier Roca-Maza Gianluca Colò |
| author_sort | Giovanni Selva |
| collection | DOAJ |
| description | Isospin symmetry breaking effects on the mass-radius relation of a cold, non-accreting neutron star are studied on the basis of two Skyrme Energy Density Functionals (EDFs). One functional contains isospin symmetry breaking terms other than those typically included in Skyrme EDFs while its counterpart is of standard form. Both functionals are based on the same fitting protocol except for the observables and pseudo-observables sensitive to the isospin symmetry breaking channel. The quality of those functionals is similar in the description of terrestrial observables but choosing either of them has a non-negligible effect on the mass-radius relation and tidal deformability of a neutron star. Further investigations are needed to clarify the effects of isospin symmetry breaking on these and other observables of neutron stars that are, and will become, available. |
| first_indexed | 2024-03-09T04:35:58Z |
| format | Article |
| id | doaj.art-8381e8c76dae4385861120676da32f7f |
| institution | Directory Open Access Journal |
| issn | 2073-8994 |
| language | English |
| last_indexed | 2024-03-09T04:35:58Z |
| publishDate | 2021-01-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Symmetry |
| spelling | doaj.art-8381e8c76dae4385861120676da32f7f2023-12-03T13:28:50ZengMDPI AGSymmetry2073-89942021-01-0113114410.3390/sym13010144Isospin Symmetry Breaking Effects on the Mass-Radius Relation of a Neutron StarGiovanni Selva0Xavier Roca-Maza1Gianluca Colò2Dipartimento di Fisica “Aldo Pontremoli”, Università degli Studi di Milano, Via Giovanni Celoria 16, 20133 Milano, ItalyDipartimento di Fisica “Aldo Pontremoli”, Università degli Studi di Milano, Via Giovanni Celoria 16, 20133 Milano, ItalyDipartimento di Fisica “Aldo Pontremoli”, Università degli Studi di Milano, Via Giovanni Celoria 16, 20133 Milano, ItalyIsospin symmetry breaking effects on the mass-radius relation of a cold, non-accreting neutron star are studied on the basis of two Skyrme Energy Density Functionals (EDFs). One functional contains isospin symmetry breaking terms other than those typically included in Skyrme EDFs while its counterpart is of standard form. Both functionals are based on the same fitting protocol except for the observables and pseudo-observables sensitive to the isospin symmetry breaking channel. The quality of those functionals is similar in the description of terrestrial observables but choosing either of them has a non-negligible effect on the mass-radius relation and tidal deformability of a neutron star. Further investigations are needed to clarify the effects of isospin symmetry breaking on these and other observables of neutron stars that are, and will become, available.https://www.mdpi.com/2073-8994/13/1/144isospin symmetry breakingneutron star mass-radius relationtidal deformability |
| spellingShingle | Giovanni Selva Xavier Roca-Maza Gianluca Colò Isospin Symmetry Breaking Effects on the Mass-Radius Relation of a Neutron Star Symmetry isospin symmetry breaking neutron star mass-radius relation tidal deformability |
| title | Isospin Symmetry Breaking Effects on the Mass-Radius Relation of a Neutron Star |
| title_full | Isospin Symmetry Breaking Effects on the Mass-Radius Relation of a Neutron Star |
| title_fullStr | Isospin Symmetry Breaking Effects on the Mass-Radius Relation of a Neutron Star |
| title_full_unstemmed | Isospin Symmetry Breaking Effects on the Mass-Radius Relation of a Neutron Star |
| title_short | Isospin Symmetry Breaking Effects on the Mass-Radius Relation of a Neutron Star |
| title_sort | isospin symmetry breaking effects on the mass radius relation of a neutron star |
| topic | isospin symmetry breaking neutron star mass-radius relation tidal deformability |
| url | https://www.mdpi.com/2073-8994/13/1/144 |
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