https://doi.org/10.1140/epja/i2016-16060-y
Regular Article - Theoretical Physics
Hybrid star structure with the Field Correlator Method
INFN, Sezione di Catania, Via Santa Sofia 64, 95123, Catania, Italy
* e-mail: fiorella.burgio@ct.infn.it
Received:
28
July
2015
Revised:
17
December
2015
Accepted:
22
December
2015
Published online:
22
March
2016
We explore the relevance of the color-flavor locking phase in the equation of state (EoS) built with the Field Correlator Method (FCM) for the description of the quark matter core of hybrid stars. For the hadronic phase, we use the microscopic Brueckner-Hartree-Fock (BHF) many-body theory, and its relativistic counterpart, i.e. the Dirac-Brueckner (DBHF). We find that the main features of the phase transition are directly related to the values of the quark-antiquark potential , the gluon condensate
and the color-flavor superconducting gap
. We confirm that the mapping between the FCM and the CSS (constant speed of sound) parameterization holds true even in the case of paired quark matter. The inclusion of hyperons in the hadronic phase and its effect on the mass-radius relation of hybrid stars is also investigated.
© SIF, Springer-Verlag Berlin Heidelberg, 2016