Hybrid Stars in the Framework of NJL Models

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 inte...

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Autores principales: Contrera, Gustavo Aníbal, Orsaria, Milva Gabriela, Ranea Sandoval, Ignacio Francisco, Weber, Fridolin
Formato: Articulo
Lenguaje:Inglés
Publicado: 2017
Materias:
Ciencias Astronómicas
Hybrid Stars
Neutron Stars
Dense Matter
Phase Transitions
Acceso en línea:http://sedici.unlp.edu.ar/handle/10915/123906
Aporte de:
SEDICI (UNLP) de Universidad Nacional de La Plata
id I19-R120-10915-123906
record_format dspace
institution Universidad Nacional de La Plata
institution_str I-19
repository_str R-120
collection SEDICI (UNLP)
language Inglés
topic Ciencias Astronómicas
Hybrid Stars
Neutron Stars
Dense Matter
Phase Transitions
spellingShingle Ciencias Astronómicas
Hybrid Stars
Neutron Stars
Dense Matter
Phase Transitions
Contrera, Gustavo Aníbal
Orsaria, Milva Gabriela
Ranea Sandoval, Ignacio Francisco
Weber, Fridolin
Hybrid Stars in the Framework of NJL Models
topic_facet Ciencias Astronómicas
Hybrid Stars
Neutron Stars
Dense Matter
Phase Transitions
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).
format Articulo
Articulo
author Contrera, Gustavo Aníbal
Orsaria, Milva Gabriela
Ranea Sandoval, Ignacio Francisco
Weber, Fridolin
author_facet Contrera, Gustavo Aníbal
Orsaria, Milva Gabriela
Ranea Sandoval, Ignacio Francisco
Weber, Fridolin
author_sort Contrera, Gustavo Aníbal
title Hybrid Stars in the Framework of NJL Models
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
publishDate 2017
url http://sedici.unlp.edu.ar/handle/10915/123906
work_keys_str_mv AT contreragustavoanibal hybridstarsintheframeworkofnjlmodels
AT orsariamilvagabriela hybridstarsintheframeworkofnjlmodels
AT raneasandovalignaciofrancisco hybridstarsintheframeworkofnjlmodels
AT weberfridolin hybridstarsintheframeworkofnjlmodels
bdutipo_str Repositorios
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