In-medium enhancement of the modified Urca neutrino reaction rates
We calculate modified Urca neutrino emission rates in the dense nuclear matter in neutron star cores. We find that these rates are strongly enhanced in the beta-stable matter in regions of the core close to the direct Urca process threshold. This enhancement can be tracked to the use of the in-mediu...
| Main Authors: | , , |
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| Format: | Article |
| Language: | English |
| Published: |
Elsevier
2018-11-01
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| Series: | Physics Letters B |
| Online Access: | http://www.sciencedirect.com/science/article/pii/S0370269318307366 |
| _version_ | 1811278092674531328 |
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| author | Peter S. Shternin Marcello Baldo Pawel Haensel |
| author_facet | Peter S. Shternin Marcello Baldo Pawel Haensel |
| author_sort | Peter S. Shternin |
| collection | DOAJ |
| description | We calculate modified Urca neutrino emission rates in the dense nuclear matter in neutron star cores. We find that these rates are strongly enhanced in the beta-stable matter in regions of the core close to the direct Urca process threshold. This enhancement can be tracked to the use of the in-medium nucleon spectrum in the virtual nucleon propagator. We describe the in-medium nucleon scattering in the non-relativistic Bruckner–Hartree–Fock framework taking into account two-body as well as the effective three-body forces, although the proposed enhancement does not rely on a particular way of the nucleon interaction treatment. Finally we suggest a simple approximate expression for the emissivity of the neutron branch of the modified Urca process that can be used in the neutron stars cooling simulations with any nucleon equation of state of dense matter. Keywords: Neutron stars, Dense matter, Neutrino emission |
| first_indexed | 2024-04-13T00:29:38Z |
| format | Article |
| id | doaj.art-087665f5ff5e40f88770a8788ff06447 |
| institution | Directory Open Access Journal |
| issn | 0370-2693 |
| language | English |
| last_indexed | 2024-04-13T00:29:38Z |
| publishDate | 2018-11-01 |
| publisher | Elsevier |
| record_format | Article |
| series | Physics Letters B |
| spelling | doaj.art-087665f5ff5e40f88770a8788ff064472022-12-22T03:10:31ZengElsevierPhysics Letters B0370-26932018-11-017862834In-medium enhancement of the modified Urca neutrino reaction ratesPeter S. Shternin0Marcello Baldo1Pawel Haensel2Ioffe Institute, Politekhnicheskaya 26, 194021 St. Petersburg, Russia; Corresponding author.Instituto Nazionale di Fisica Nucleare, Sez. di Catania, Via S. Sofia 64, 95123 Catania, ItalyN. Copernicus Astronomical Center, Polish Academy of Sciences, Bartycka 18, PL-00-716 Warszawa, PolandWe calculate modified Urca neutrino emission rates in the dense nuclear matter in neutron star cores. We find that these rates are strongly enhanced in the beta-stable matter in regions of the core close to the direct Urca process threshold. This enhancement can be tracked to the use of the in-medium nucleon spectrum in the virtual nucleon propagator. We describe the in-medium nucleon scattering in the non-relativistic Bruckner–Hartree–Fock framework taking into account two-body as well as the effective three-body forces, although the proposed enhancement does not rely on a particular way of the nucleon interaction treatment. Finally we suggest a simple approximate expression for the emissivity of the neutron branch of the modified Urca process that can be used in the neutron stars cooling simulations with any nucleon equation of state of dense matter. Keywords: Neutron stars, Dense matter, Neutrino emissionhttp://www.sciencedirect.com/science/article/pii/S0370269318307366 |
| spellingShingle | Peter S. Shternin Marcello Baldo Pawel Haensel In-medium enhancement of the modified Urca neutrino reaction rates Physics Letters B |
| title | In-medium enhancement of the modified Urca neutrino reaction rates |
| title_full | In-medium enhancement of the modified Urca neutrino reaction rates |
| title_fullStr | In-medium enhancement of the modified Urca neutrino reaction rates |
| title_full_unstemmed | In-medium enhancement of the modified Urca neutrino reaction rates |
| title_short | In-medium enhancement of the modified Urca neutrino reaction rates |
| title_sort | in medium enhancement of the modified urca neutrino reaction rates |
| url | http://www.sciencedirect.com/science/article/pii/S0370269318307366 |
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