INVESTIGADORES
CONTRERA Gustavo Anibal Gabriel
congresos y reuniones científicas
Título:
Hybrid Stars in the Framework of NJL Models
Autor/es:
GUSTAVO A. CONTRERA; MILVA ORSARIA; I.F. RANEA-SANDOVAL; FRIDOLIN WEBER
Lugar:
Gramado, Rio Grande do Sul
Reunión:
Workshop; 7th International Workshop on Astronomy and Relativistic Astrophysics (IWARA); 2017
Institución organizadora:
Universidade Federal do Rio Grande do Sul (UFRGS)
Resumen:
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 leadsto a very short hybrid star branch in the mass-radius relation (generally for local NJL models).