Bayesian Analysis of Hybrid Neutron Star EOS Constraints Within an Instantaneous Nonlocal Chiral Quark Matter Model
- Autores
- Ayriyan, Alexander; Blaschke, David; Carlomagno, Juan Pablo; Contrera, Gustavo Aníbal; Grunfeld, Ana Gabriela
- Año de publicación
- 2025
- Idioma
- inglés
- Tipo de recurso
- artículo
- Estado
- versión publicada
- Descripción
- We present a physics-informed Bayesian analysis of equation of state constraints using observational data for masses, radii and tidal deformability of pulsars and a generic class of hybrid neutron star equation of state with color superconducting quark matter on the basis of a recently developed nonlocal chiral quark model. The nuclear matter phase is described within a relativistic density functional model of the DD2 class and the phase transition is obtained by a Maxwell construction. We find the region in the two-dimensional parameter space spanned by the vector meson coupling and the scalar diquark coupling, where three conditions are fulfilled: (1) the Maxwell construction can be performed, (2) the maximum mass of the hybrid neutron star is not smaller than 2.0 M⊙ and (3) the onset density of the phase transition is not below the nuclear saturation density n0 = 0.15 fm−3. The result of this study shows that the favorable neutron star equation of state has low onset masses for the occurrence of a color superconducting quark matter core between 0.5–0.7 M⊙ and maximum masses in the range 2.15–2.22 M⊙. In the typical mass range of 1.2–2.0 M⊙, the radii of these stars are between 11.9 and 12.4 km, almost independent of the mass. In principle, hybrid stars would allow for larger maximum masses than provided by the hadronic reference equation of state.
Instituto de Física La Plata - Materia
-
Física
Bayesian analysis
hybrid neutron stars
color superconductivity
quark deconfinement - Nivel de accesibilidad
- acceso abierto
- Condiciones de uso
- http://creativecommons.org/licenses/by/4.0/
- Repositorio
- Institución
- Universidad Nacional de La Plata
- OAI Identificador
- oai:sedici.unlp.edu.ar:10915/181863
Ver los metadatos del registro completo
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Bayesian Analysis of Hybrid Neutron Star EOS Constraints Within an Instantaneous Nonlocal Chiral Quark Matter ModelAyriyan, AlexanderBlaschke, DavidCarlomagno, Juan PabloContrera, Gustavo AníbalGrunfeld, Ana GabrielaFísicaBayesian analysishybrid neutron starscolor superconductivityquark deconfinementWe present a physics-informed Bayesian analysis of equation of state constraints using observational data for masses, radii and tidal deformability of pulsars and a generic class of hybrid neutron star equation of state with color superconducting quark matter on the basis of a recently developed nonlocal chiral quark model. The nuclear matter phase is described within a relativistic density functional model of the DD2 class and the phase transition is obtained by a Maxwell construction. We find the region in the two-dimensional parameter space spanned by the vector meson coupling and the scalar diquark coupling, where three conditions are fulfilled: (1) the Maxwell construction can be performed, (2) the maximum mass of the hybrid neutron star is not smaller than 2.0 M⊙ and (3) the onset density of the phase transition is not below the nuclear saturation density n0 = 0.15 fm−3. The result of this study shows that the favorable neutron star equation of state has low onset masses for the occurrence of a color superconducting quark matter core between 0.5–0.7 M⊙ and maximum masses in the range 2.15–2.22 M⊙. In the typical mass range of 1.2–2.0 M⊙, the radii of these stars are between 11.9 and 12.4 km, almost independent of the mass. In principle, hybrid stars would allow for larger maximum masses than provided by the hadronic reference equation of state.Instituto de Física La Plata2025-04info: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/10915/181863enginfo:eu-repo/semantics/altIdentifier/issn/2218-1997info:eu-repo/semantics/altIdentifier/doi/10.3390/universe11050141info: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:UNLP2025-09-29T11:49:38Zoai:sedici.unlp.edu.ar:10915/181863Institucionalhttp://sedici.unlp.edu.ar/Universidad públicaNo correspondehttp://sedici.unlp.edu.ar/oai/snrdalira@sedici.unlp.edu.arArgentinaNo correspondeNo correspondeNo correspondeopendoar:13292025-09-29 11:49:39.024SEDICI (UNLP) - Universidad Nacional de La Platafalse |
dc.title.none.fl_str_mv |
Bayesian Analysis of Hybrid Neutron Star EOS Constraints Within an Instantaneous Nonlocal Chiral Quark Matter Model |
title |
Bayesian Analysis of Hybrid Neutron Star EOS Constraints Within an Instantaneous Nonlocal Chiral Quark Matter Model |
spellingShingle |
Bayesian Analysis of Hybrid Neutron Star EOS Constraints Within an Instantaneous Nonlocal Chiral Quark Matter Model Ayriyan, Alexander Física Bayesian analysis hybrid neutron stars color superconductivity quark deconfinement |
title_short |
Bayesian Analysis of Hybrid Neutron Star EOS Constraints Within an Instantaneous Nonlocal Chiral Quark Matter Model |
title_full |
Bayesian Analysis of Hybrid Neutron Star EOS Constraints Within an Instantaneous Nonlocal Chiral Quark Matter Model |
title_fullStr |
Bayesian Analysis of Hybrid Neutron Star EOS Constraints Within an Instantaneous Nonlocal Chiral Quark Matter Model |
title_full_unstemmed |
Bayesian Analysis of Hybrid Neutron Star EOS Constraints Within an Instantaneous Nonlocal Chiral Quark Matter Model |
title_sort |
Bayesian Analysis of Hybrid Neutron Star EOS Constraints Within an Instantaneous Nonlocal Chiral Quark Matter Model |
dc.creator.none.fl_str_mv |
Ayriyan, Alexander Blaschke, David Carlomagno, Juan Pablo Contrera, Gustavo Aníbal Grunfeld, Ana Gabriela |
author |
Ayriyan, Alexander |
author_facet |
Ayriyan, Alexander Blaschke, David Carlomagno, Juan Pablo Contrera, Gustavo Aníbal Grunfeld, Ana Gabriela |
author_role |
author |
author2 |
Blaschke, David Carlomagno, Juan Pablo Contrera, Gustavo Aníbal Grunfeld, Ana Gabriela |
author2_role |
author author author author |
dc.subject.none.fl_str_mv |
Física Bayesian analysis hybrid neutron stars color superconductivity quark deconfinement |
topic |
Física Bayesian analysis hybrid neutron stars color superconductivity quark deconfinement |
dc.description.none.fl_txt_mv |
We present a physics-informed Bayesian analysis of equation of state constraints using observational data for masses, radii and tidal deformability of pulsars and a generic class of hybrid neutron star equation of state with color superconducting quark matter on the basis of a recently developed nonlocal chiral quark model. The nuclear matter phase is described within a relativistic density functional model of the DD2 class and the phase transition is obtained by a Maxwell construction. We find the region in the two-dimensional parameter space spanned by the vector meson coupling and the scalar diquark coupling, where three conditions are fulfilled: (1) the Maxwell construction can be performed, (2) the maximum mass of the hybrid neutron star is not smaller than 2.0 M⊙ and (3) the onset density of the phase transition is not below the nuclear saturation density n0 = 0.15 fm−3. The result of this study shows that the favorable neutron star equation of state has low onset masses for the occurrence of a color superconducting quark matter core between 0.5–0.7 M⊙ and maximum masses in the range 2.15–2.22 M⊙. In the typical mass range of 1.2–2.0 M⊙, the radii of these stars are between 11.9 and 12.4 km, almost independent of the mass. In principle, hybrid stars would allow for larger maximum masses than provided by the hadronic reference equation of state. Instituto de Física La Plata |
description |
We present a physics-informed Bayesian analysis of equation of state constraints using observational data for masses, radii and tidal deformability of pulsars and a generic class of hybrid neutron star equation of state with color superconducting quark matter on the basis of a recently developed nonlocal chiral quark model. The nuclear matter phase is described within a relativistic density functional model of the DD2 class and the phase transition is obtained by a Maxwell construction. We find the region in the two-dimensional parameter space spanned by the vector meson coupling and the scalar diquark coupling, where three conditions are fulfilled: (1) the Maxwell construction can be performed, (2) the maximum mass of the hybrid neutron star is not smaller than 2.0 M⊙ and (3) the onset density of the phase transition is not below the nuclear saturation density n0 = 0.15 fm−3. The result of this study shows that the favorable neutron star equation of state has low onset masses for the occurrence of a color superconducting quark matter core between 0.5–0.7 M⊙ and maximum masses in the range 2.15–2.22 M⊙. In the typical mass range of 1.2–2.0 M⊙, the radii of these stars are between 11.9 and 12.4 km, almost independent of the mass. In principle, hybrid stars would allow for larger maximum masses than provided by the hadronic reference equation of state. |
publishDate |
2025 |
dc.date.none.fl_str_mv |
2025-04 |
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/10915/181863 |
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http://sedici.unlp.edu.ar/handle/10915/181863 |
dc.language.none.fl_str_mv |
eng |
language |
eng |
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info:eu-repo/semantics/altIdentifier/issn/2218-1997 info:eu-repo/semantics/altIdentifier/doi/10.3390/universe11050141 |
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info:eu-repo/semantics/openAccess http://creativecommons.org/licenses/by/4.0/ Creative Commons Attribution 4.0 International (CC BY 4.0) |
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openAccess |
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http://creativecommons.org/licenses/by/4.0/ Creative Commons Attribution 4.0 International (CC BY 4.0) |
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application/pdf |
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