Hybrid star structure with the Field Correlator Method

Abstract

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 $V_1$, the gluon condensate $G_2$ and the color-flavor superconducting gap $\Delta$. 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.

15 pages, 8 figures ; revised version to be published in the EPJA Topical Issue on "Exotic Matter in Neutron Stars"

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• Cooling of hybrid neutron stars with microscopic equations of state
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• Hybrid stars with reactive interfaces: analysis within the Nambu-Jona-Lasinio model
• Towards generating a new supernova equation of state: A systematic analysis of cold hybrid stars
• Hybrid star within the framework of a lowest-order constraint variational method
• Structure and tidal deformability of a hybrid star within the framework of the field correlator method
• Spherically symmetric anisotropic strange stars
• Hybrid stars within the framework of the Sigma-Omega-Rho model combined with the MIT and NJL models
• Simplified Thermal Evolution of Proto-hybrid Stars