Hybrid Stars in the Framework of NJL Models

Autores
Contrera, Gustavo Aníbal; Orsaria, Milva Gabriela; Ranea Sandoval, Ignacio Francisco; Weber, Fridolin
Año de publicación
2017
Idioma
inglés
Tipo de recurso
artículo
Estado
versión publicada
Descripción
We compute models for the equation of state (EoS) of the matter in the cores of hybrid stars. Hadronic matter is treated in the non-linear relativistic mean-field approximation, and quark matter is modeled by three-flavor local and non-local Nambu−Jona-Lasinio (NJL) models with repulsive vector interactions. The transition from hadronic to quark matter is constructed by considering either a soft phase transition (Gibbs construction) or a sharp phase transition (Maxwell construction). We find that high-mass neutron stars with masses up to 2.1 − 2.4M⊙ may contain a mixed phase with hadrons and quarks in their cores, if global charge conservation is imposed via the Gibbs conditions. However, if the Maxwell conditions is considered, the appearance of a pure quark matter core either destabilizes the star immediately (commonly for non-local NJL models) or leads to a very short hybrid star branch in the mass-radius relation (generally for local NJL models).
Facultad de Ciencias Astronómicas y Geofísicas
Materia
Ciencias Astronómicas
Hybrid Stars
Neutron Stars
Dense Matter
Phase Transitions
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:10915/123906
Acceder
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oai_identifier_str oai:sedici.unlp.edu.ar:10915/123906
network_acronym_str SEDICI
repository_id_str 1329
network_name_str SEDICI (UNLP)
spelling Hybrid Stars in the Framework of NJL ModelsContrera, Gustavo AníbalOrsaria, Milva GabrielaRanea Sandoval, Ignacio FranciscoWeber, FridolinCiencias AstronómicasHybrid StarsNeutron StarsDense MatterPhase TransitionsWe compute models for the equation of state (EoS) of the matter in the cores of hybrid stars. Hadronic matter is treated in the non-linear relativistic mean-field approximation, and quark matter is modeled by three-flavor local and non-local Nambu−Jona-Lasinio (NJL) models with repulsive vector interactions. The transition from hadronic to quark matter is constructed by considering either a soft phase transition (Gibbs construction) or a sharp phase transition (Maxwell construction). We find that high-mass neutron stars with masses up to 2.1 − 2.4M⊙ may contain a mixed phase with hadrons and quarks in their cores, if global charge conservation is imposed via the Gibbs conditions. However, if the Maxwell conditions is considered, the appearance of a pure quark matter core either destabilizes the star immediately (commonly for non-local NJL models) or leads to a very short hybrid star branch in the mass-radius relation (generally for local NJL models).Facultad de Ciencias Astronómicas y Geofísicas2017-08-13info: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/10915/123906enginfo:eu-repo/semantics/altIdentifier/issn/2010-1945info:eu-repo/semantics/altIdentifier/arxiv/1612.09485info:eu-repo/semantics/altIdentifier/doi/10.1142/s2010194517600266info: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:UNLP2025-09-29T11:29:28Zoai:sedici.unlp.edu.ar:10915/123906Institucionalhttp://sedici.unlp.edu.ar/Universidad públicaNo correspondehttp://sedici.unlp.edu.ar/oai/snrdalira@sedici.unlp.edu.arArgentinaNo correspondeNo correspondeNo correspondeopendoar:13292025-09-29 11:29:28.664SEDICI (UNLP) - Universidad Nacional de La Platafalse
dc.title.none.fl_str_mv Hybrid Stars in the Framework of NJL Models
title Hybrid Stars in the Framework of NJL Models
spellingShingle Hybrid Stars in the Framework of NJL Models
Contrera, Gustavo Aníbal
Ciencias Astronómicas
Hybrid Stars
Neutron Stars
Dense Matter
Phase Transitions
title_short Hybrid Stars in the Framework of NJL Models
title_full Hybrid Stars in the Framework of NJL Models
title_fullStr Hybrid Stars in the Framework of NJL Models
title_full_unstemmed Hybrid Stars in the Framework of NJL Models
title_sort Hybrid Stars in the Framework of NJL Models
dc.creator.none.fl_str_mv Contrera, Gustavo Aníbal
Orsaria, Milva Gabriela
Ranea Sandoval, Ignacio Francisco
Weber, Fridolin
author Contrera, Gustavo Aníbal
author_facet Contrera, Gustavo Aníbal
Orsaria, Milva Gabriela
Ranea Sandoval, Ignacio Francisco
Weber, Fridolin
author_role author
author2 Orsaria, Milva Gabriela
Ranea Sandoval, Ignacio Francisco
Weber, Fridolin
author2_role author
author
author
dc.subject.none.fl_str_mv Ciencias Astronómicas
Hybrid Stars
Neutron Stars
Dense Matter
Phase Transitions
topic Ciencias Astronómicas
Hybrid Stars
Neutron Stars
Dense Matter
Phase Transitions
dc.description.none.fl_txt_mv We compute models for the equation of state (EoS) of the matter in the cores of hybrid stars. Hadronic matter is treated in the non-linear relativistic mean-field approximation, and quark matter is modeled by three-flavor local and non-local Nambu−Jona-Lasinio (NJL) models with repulsive vector interactions. The transition from hadronic to quark matter is constructed by considering either a soft phase transition (Gibbs construction) or a sharp phase transition (Maxwell construction). We find that high-mass neutron stars with masses up to 2.1 − 2.4M⊙ may contain a mixed phase with hadrons and quarks in their cores, if global charge conservation is imposed via the Gibbs conditions. However, if the Maxwell conditions is considered, the appearance of a pure quark matter core either destabilizes the star immediately (commonly for non-local NJL models) or leads to a very short hybrid star branch in the mass-radius relation (generally for local NJL models).
Facultad de Ciencias Astronómicas y Geofísicas
description We compute models for the equation of state (EoS) of the matter in the cores of hybrid stars. Hadronic matter is treated in the non-linear relativistic mean-field approximation, and quark matter is modeled by three-flavor local and non-local Nambu−Jona-Lasinio (NJL) models with repulsive vector interactions. The transition from hadronic to quark matter is constructed by considering either a soft phase transition (Gibbs construction) or a sharp phase transition (Maxwell construction). We find that high-mass neutron stars with masses up to 2.1 − 2.4M⊙ may contain a mixed phase with hadrons and quarks in their cores, if global charge conservation is imposed via the Gibbs conditions. However, if the Maxwell conditions is considered, the appearance of a pure quark matter core either destabilizes the star immediately (commonly for non-local NJL models) or leads to a very short hybrid star branch in the mass-radius relation (generally for local NJL models).
publishDate 2017
dc.date.none.fl_str_mv 2017-08-13
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/10915/123906
url http://sedici.unlp.edu.ar/handle/10915/123906
dc.language.none.fl_str_mv eng
language eng
dc.relation.none.fl_str_mv info:eu-repo/semantics/altIdentifier/issn/2010-1945
info:eu-repo/semantics/altIdentifier/arxiv/1612.09485
info:eu-repo/semantics/altIdentifier/doi/10.1142/s2010194517600266
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
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score 13.070432

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