Thermal evolution of hybrid stars within the framework of a nonlocal Nambu-Jona-Lasinio model

Autores
Carvalho, S. M. de; Negreiros, R.; Orsaria, Milva Gabriela; Contrera, Gustavo Aníbal; Weber, F.; Spinella, W.
Año de publicación
2015
Idioma
inglés
Tipo de recurso
artículo
Estado
versión publicada
Descripción
We study the thermal evolution of neutron stars containing deconfined quark matter in their core. Such objects are generally referred to as quark-hybrid stars. The confined hadronic matter in their core is described in the framework of nonlinear relativistic nuclear field theory. For the quark phase we use a nonlocal extension of the SU(3) Nambu-Jona-Lasinio model with vector interactions. The Gibbs condition is used to model phase equilibrium between confined hadronic matter and deconfined quark matter. Our study indicates that high-mass neutron stars may contain between 35 and 40% deconfined quark-hybrid matter in their cores. Neutron stars with canonical masses of around 1.4M⊙ would not contain deconfined quark matter. The central proton fractions of the stars are found to be high, enabling them to cool rapidly. Very good agreement with the temperature evolution established for the neutron star in Cassiopeia A (Cas A) is obtained for one of our models (based on the popular NL3 nuclear parametrization), if the protons in the core of our stellar models are strongly paired, the repulsion among the quarks is mildly repulsive, and the mass of Cas A has a canonical value of 1.4M⊙.
Facultad de Ciencias Astronómicas y Geofísicas
Instituto de Física La Plata
Materia
Ciencias Astronómicas
Física
thermal evolution
neutron stars
quark matter
Nivel de accesibilidad
acceso abierto
Condiciones de uso
http://creativecommons.org/licenses/by/4.0/
Repositorio
SEDICI (UNLP)
Institución
Universidad Nacional de La Plata
OAI Identificador
oai:sedici.unlp.edu.ar:10915/86901
Acceder
id SEDICI_652f55d7e19a0fd9d89e6b0d64a2ce49
oai_identifier_str oai:sedici.unlp.edu.ar:10915/86901
network_acronym_str SEDICI
repository_id_str 1329
network_name_str SEDICI (UNLP)
spelling Thermal evolution of hybrid stars within the framework of a nonlocal Nambu-Jona-Lasinio modelCarvalho, S. M. deNegreiros, R.Orsaria, Milva GabrielaContrera, Gustavo AníbalWeber, F.Spinella, W.Ciencias AstronómicasFísicathermal evolutionneutron starsquark matterWe study the thermal evolution of neutron stars containing deconfined quark matter in their core. Such objects are generally referred to as quark-hybrid stars. The confined hadronic matter in their core is described in the framework of nonlinear relativistic nuclear field theory. For the quark phase we use a nonlocal extension of the SU(3) Nambu-Jona-Lasinio model with vector interactions. The Gibbs condition is used to model phase equilibrium between confined hadronic matter and deconfined quark matter. Our study indicates that high-mass neutron stars may contain between 35 and 40% deconfined quark-hybrid matter in their cores. Neutron stars with canonical masses of around 1.4M⊙ would not contain deconfined quark matter. The central proton fractions of the stars are found to be high, enabling them to cool rapidly. Very good agreement with the temperature evolution established for the neutron star in Cassiopeia A (Cas A) is obtained for one of our models (based on the popular NL3 nuclear parametrization), if the protons in the core of our stellar models are strongly paired, the repulsion among the quarks is mildly repulsive, and the mass of Cas A has a canonical value of 1.4M⊙.Facultad de Ciencias Astronómicas y GeofísicasInstituto de Física La Plata2015info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionArticulohttp://purl.org/coar/resource_type/c_6501info:ar-repo/semantics/articuloapplication/pdfhttp://sedici.unlp.edu.ar/handle/10915/86901enginfo:eu-repo/semantics/altIdentifier/issn/0556-2813info:eu-repo/semantics/altIdentifier/doi/10.1103/PhysRevC.92.035810info:eu-repo/semantics/openAccesshttp://creativecommons.org/licenses/by/4.0/Creative Commons Attribution 4.0 International (CC BY 4.0)reponame:SEDICI (UNLP)instname:Universidad Nacional de La Platainstacron:UNLP2025-09-03T10:49:12Zoai:sedici.unlp.edu.ar:10915/86901Institucionalhttp://sedici.unlp.edu.ar/Universidad públicaNo correspondehttp://sedici.unlp.edu.ar/oai/snrdalira@sedici.unlp.edu.arArgentinaNo correspondeNo correspondeNo correspondeopendoar:13292025-09-03 10:49:12.746SEDICI (UNLP) - Universidad Nacional de La Platafalse
dc.title.none.fl_str_mv Thermal evolution of hybrid stars within the framework of a nonlocal Nambu-Jona-Lasinio model
title Thermal evolution of hybrid stars within the framework of a nonlocal Nambu-Jona-Lasinio model
spellingShingle Thermal evolution of hybrid stars within the framework of a nonlocal Nambu-Jona-Lasinio model
Carvalho, S. M. de
Ciencias Astronómicas
Física
thermal evolution
neutron stars
quark matter
title_short Thermal evolution of hybrid stars within the framework of a nonlocal Nambu-Jona-Lasinio model
title_full Thermal evolution of hybrid stars within the framework of a nonlocal Nambu-Jona-Lasinio model
title_fullStr Thermal evolution of hybrid stars within the framework of a nonlocal Nambu-Jona-Lasinio model
title_full_unstemmed Thermal evolution of hybrid stars within the framework of a nonlocal Nambu-Jona-Lasinio model
title_sort Thermal evolution of hybrid stars within the framework of a nonlocal Nambu-Jona-Lasinio model
dc.creator.none.fl_str_mv Carvalho, S. M. de
Negreiros, R.
Orsaria, Milva Gabriela
Contrera, Gustavo Aníbal
Weber, F.
Spinella, W.
author Carvalho, S. M. de
author_facet Carvalho, S. M. de
Negreiros, R.
Orsaria, Milva Gabriela
Contrera, Gustavo Aníbal
Weber, F.
Spinella, W.
author_role author
author2 Negreiros, R.
Orsaria, Milva Gabriela
Contrera, Gustavo Aníbal
Weber, F.
Spinella, W.
author2_role author
author
author
author
author
dc.subject.none.fl_str_mv Ciencias Astronómicas
Física
thermal evolution
neutron stars
quark matter
topic Ciencias Astronómicas
Física
thermal evolution
neutron stars
quark matter
dc.description.none.fl_txt_mv We study the thermal evolution of neutron stars containing deconfined quark matter in their core. Such objects are generally referred to as quark-hybrid stars. The confined hadronic matter in their core is described in the framework of nonlinear relativistic nuclear field theory. For the quark phase we use a nonlocal extension of the SU(3) Nambu-Jona-Lasinio model with vector interactions. The Gibbs condition is used to model phase equilibrium between confined hadronic matter and deconfined quark matter. Our study indicates that high-mass neutron stars may contain between 35 and 40% deconfined quark-hybrid matter in their cores. Neutron stars with canonical masses of around 1.4M⊙ would not contain deconfined quark matter. The central proton fractions of the stars are found to be high, enabling them to cool rapidly. Very good agreement with the temperature evolution established for the neutron star in Cassiopeia A (Cas A) is obtained for one of our models (based on the popular NL3 nuclear parametrization), if the protons in the core of our stellar models are strongly paired, the repulsion among the quarks is mildly repulsive, and the mass of Cas A has a canonical value of 1.4M⊙.
Facultad de Ciencias Astronómicas y Geofísicas
Instituto de Física La Plata
description We study the thermal evolution of neutron stars containing deconfined quark matter in their core. Such objects are generally referred to as quark-hybrid stars. The confined hadronic matter in their core is described in the framework of nonlinear relativistic nuclear field theory. For the quark phase we use a nonlocal extension of the SU(3) Nambu-Jona-Lasinio model with vector interactions. The Gibbs condition is used to model phase equilibrium between confined hadronic matter and deconfined quark matter. Our study indicates that high-mass neutron stars may contain between 35 and 40% deconfined quark-hybrid matter in their cores. Neutron stars with canonical masses of around 1.4M⊙ would not contain deconfined quark matter. The central proton fractions of the stars are found to be high, enabling them to cool rapidly. Very good agreement with the temperature evolution established for the neutron star in Cassiopeia A (Cas A) is obtained for one of our models (based on the popular NL3 nuclear parametrization), if the protons in the core of our stellar models are strongly paired, the repulsion among the quarks is mildly repulsive, and the mass of Cas A has a canonical value of 1.4M⊙.
publishDate 2015
dc.date.none.fl_str_mv 2015
dc.type.none.fl_str_mv info:eu-repo/semantics/article
info:eu-repo/semantics/publishedVersion
Articulo
http://purl.org/coar/resource_type/c_6501
info:ar-repo/semantics/articulo
format article
status_str publishedVersion
dc.identifier.none.fl_str_mv http://sedici.unlp.edu.ar/handle/10915/86901
url http://sedici.unlp.edu.ar/handle/10915/86901
dc.language.none.fl_str_mv eng
language eng
dc.relation.none.fl_str_mv info:eu-repo/semantics/altIdentifier/issn/0556-2813
info:eu-repo/semantics/altIdentifier/doi/10.1103/PhysRevC.92.035810
dc.rights.none.fl_str_mv info:eu-repo/semantics/openAccess
http://creativecommons.org/licenses/by/4.0/
Creative Commons Attribution 4.0 International (CC BY 4.0)
eu_rights_str_mv openAccess
rights_invalid_str_mv http://creativecommons.org/licenses/by/4.0/
Creative Commons Attribution 4.0 International (CC BY 4.0)
dc.format.none.fl_str_mv application/pdf
dc.source.none.fl_str_mv reponame:SEDICI (UNLP)
instname:Universidad Nacional de La Plata
instacron:UNLP
reponame_str SEDICI (UNLP)
collection SEDICI (UNLP)
instname_str Universidad Nacional de La Plata
instacron_str UNLP
institution UNLP
repository.name.fl_str_mv SEDICI (UNLP) - Universidad Nacional de La Plata
repository.mail.fl_str_mv alira@sedici.unlp.edu.ar
_version_ 1842260368242507776
score 13.13397

Publicaciones similares