Quark-hybrid matter in the cores of massive neutron stars

Autores
Orsaria, Milva Gabriela; Rodrigues, H.; Weber, F.; Contrera, Gustavo Aníbal
Año de publicación
2013
Idioma
inglés
Tipo de recurso
artículo
Estado
versión publicada
Descripción
Using a nonlocal extension of the SU(3) Nambu-Jona-Lasinio model, which reproduces several of the key features of quantum chromodynamics, we show that mixed phases of deconfined quarks and confined hadrons (quark-hybrid matter) may exist in the cores of neutron stars as massive as around 2.1M ⊙. The radii of these objects are found to be in the canonical range of ∼12-13 km. According to our study, the transition to pure quark matter does not occur in stable neutron stars, but is shifted to neutron stars which are unstable against radial oscillations. The implications of our study for the recently discovered, massive neutron star PSR J1614-2230, whose gravitational mass is 1.97±0.04M⊙, are that this neutron star may contain an extended region of quark-hybrid matter at it center, but no pure quark matter.
Facultad de Ciencias Astronómicas y Geofísicas
Materia
Ciencias Astronómicas
Quarks
Stars
Hybrid star
Nivel de accesibilidad
acceso abierto
Condiciones de uso
http://creativecommons.org/licenses/by-nc-sa/4.0/
Repositorio
SEDICI (UNLP)
Institución
Universidad Nacional de La Plata
OAI Identificador
oai:sedici.unlp.edu.ar:10915/85576

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repository_id_str 1329
network_name_str SEDICI (UNLP)
spelling Quark-hybrid matter in the cores of massive neutron starsOrsaria, Milva GabrielaRodrigues, H.Weber, F.Contrera, Gustavo AníbalCiencias AstronómicasQuarksStarsHybrid starUsing a nonlocal extension of the SU(3) Nambu-Jona-Lasinio model, which reproduces several of the key features of quantum chromodynamics, we show that mixed phases of deconfined quarks and confined hadrons (quark-hybrid matter) may exist in the cores of neutron stars as massive as around 2.1M ⊙. The radii of these objects are found to be in the canonical range of ∼12-13 km. According to our study, the transition to pure quark matter does not occur in stable neutron stars, but is shifted to neutron stars which are unstable against radial oscillations. The implications of our study for the recently discovered, massive neutron star PSR J1614-2230, whose gravitational mass is 1.97±0.04M⊙, are that this neutron star may contain an extended region of quark-hybrid matter at it center, but no pure quark matter.Facultad de Ciencias Astronómicas y Geofísicas2013info: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/10915/85576enginfo:eu-repo/semantics/altIdentifier/issn/1550-7998info:eu-repo/semantics/altIdentifier/doi/10.1103/PhysRevD.87.023001info:eu-repo/semantics/openAccesshttp://creativecommons.org/licenses/by-nc-sa/4.0/Creative Commons Attribution-NonCommercial-ShareAlike 4.0 International (CC BY-NC-SA 4.0)reponame:SEDICI (UNLP)instname:Universidad Nacional de La Platainstacron:UNLP2025-09-29T11:16:34Zoai:sedici.unlp.edu.ar:10915/85576Institucionalhttp://sedici.unlp.edu.ar/Universidad públicaNo correspondehttp://sedici.unlp.edu.ar/oai/snrdalira@sedici.unlp.edu.arArgentinaNo correspondeNo correspondeNo correspondeopendoar:13292025-09-29 11:16:34.823SEDICI (UNLP) - Universidad Nacional de La Platafalse
dc.title.none.fl_str_mv Quark-hybrid matter in the cores of massive neutron stars
title Quark-hybrid matter in the cores of massive neutron stars
spellingShingle Quark-hybrid matter in the cores of massive neutron stars
Orsaria, Milva Gabriela
Ciencias Astronómicas
Quarks
Stars
Hybrid star
title_short Quark-hybrid matter in the cores of massive neutron stars
title_full Quark-hybrid matter in the cores of massive neutron stars
title_fullStr Quark-hybrid matter in the cores of massive neutron stars
title_full_unstemmed Quark-hybrid matter in the cores of massive neutron stars
title_sort Quark-hybrid matter in the cores of massive neutron stars
dc.creator.none.fl_str_mv Orsaria, Milva Gabriela
Rodrigues, H.
Weber, F.
Contrera, Gustavo Aníbal
author Orsaria, Milva Gabriela
author_facet Orsaria, Milva Gabriela
Rodrigues, H.
Weber, F.
Contrera, Gustavo Aníbal
author_role author
author2 Rodrigues, H.
Weber, F.
Contrera, Gustavo Aníbal
author2_role author
author
author
dc.subject.none.fl_str_mv Ciencias Astronómicas
Quarks
Stars
Hybrid star
topic Ciencias Astronómicas
Quarks
Stars
Hybrid star
dc.description.none.fl_txt_mv Using a nonlocal extension of the SU(3) Nambu-Jona-Lasinio model, which reproduces several of the key features of quantum chromodynamics, we show that mixed phases of deconfined quarks and confined hadrons (quark-hybrid matter) may exist in the cores of neutron stars as massive as around 2.1M ⊙. The radii of these objects are found to be in the canonical range of ∼12-13 km. According to our study, the transition to pure quark matter does not occur in stable neutron stars, but is shifted to neutron stars which are unstable against radial oscillations. The implications of our study for the recently discovered, massive neutron star PSR J1614-2230, whose gravitational mass is 1.97±0.04M⊙, are that this neutron star may contain an extended region of quark-hybrid matter at it center, but no pure quark matter.
Facultad de Ciencias Astronómicas y Geofísicas
description Using a nonlocal extension of the SU(3) Nambu-Jona-Lasinio model, which reproduces several of the key features of quantum chromodynamics, we show that mixed phases of deconfined quarks and confined hadrons (quark-hybrid matter) may exist in the cores of neutron stars as massive as around 2.1M ⊙. The radii of these objects are found to be in the canonical range of ∼12-13 km. According to our study, the transition to pure quark matter does not occur in stable neutron stars, but is shifted to neutron stars which are unstable against radial oscillations. The implications of our study for the recently discovered, massive neutron star PSR J1614-2230, whose gravitational mass is 1.97±0.04M⊙, are that this neutron star may contain an extended region of quark-hybrid matter at it center, but no pure quark matter.
publishDate 2013
dc.date.none.fl_str_mv 2013
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/10915/85576
url http://sedici.unlp.edu.ar/handle/10915/85576
dc.language.none.fl_str_mv eng
language eng
dc.relation.none.fl_str_mv info:eu-repo/semantics/altIdentifier/issn/1550-7998
info:eu-repo/semantics/altIdentifier/doi/10.1103/PhysRevD.87.023001
dc.rights.none.fl_str_mv info:eu-repo/semantics/openAccess
http://creativecommons.org/licenses/by-nc-sa/4.0/
Creative Commons Attribution-NonCommercial-ShareAlike 4.0 International (CC BY-NC-SA 4.0)
eu_rights_str_mv openAccess
rights_invalid_str_mv http://creativecommons.org/licenses/by-nc-sa/4.0/
Creative Commons Attribution-NonCommercial-ShareAlike 4.0 International (CC BY-NC-SA 4.0)
dc.format.none.fl_str_mv application/pdf
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instname:Universidad Nacional de La Plata
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reponame_str SEDICI (UNLP)
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