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
.jpg)
- Institución
- Universidad Nacional de La Plata
- OAI Identificador
- oai:sedici.unlp.edu.ar:10915/85576
Ver los metadatos del registro completo
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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:UNLP2025-10-22T16:57:22Zoai: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:13292025-10-22 16:57:22.875SEDICI (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 |
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2013 |
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http://sedici.unlp.edu.ar/handle/10915/85576 |
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eng |
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eng |
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info:eu-repo/semantics/altIdentifier/issn/1550-7998 info:eu-repo/semantics/altIdentifier/doi/10.1103/PhysRevD.87.023001 |
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