Stability of CFL cores in Hybrid Stars

Abstract

We study the equation state of strongly interacting quark matter within a NJL-like model in which the chiral condensates and the color superconducting gaps are computed self-consistently as a function of the baryon density. A vector interaction term is added to the Lagrangian in order to render the quark matter equation of state stiffer. For the low density hadronic phase we use a relativistic mean field model. The phase transition to quark matter is computed by a Maxwell construction. We show that stable CFL cores in hybrid stars are possible if the superconducting gap is sufficiently large. Moreover we find stable stellar configurations in which two phase transitions occur, a first transition from hadronic matter to 2SC quark matter and a second transition from 2SC quark matter to CFL quark matter.

10 pages, 6 figures

References in corpus (12)

• Quark matter in compact stars?
• Modern compact star observations and the quark matter equation of state
• Equilibrium sequences of non rotating and rapidly rotating crystalline color superconducting hybrid stars
• Effects of color superconductivity on the nucleation of quark matter in neutron stars
• Quark matter in neutron stars within the Nambu - Jona-Lasinio model and confinement
• Bulk viscosity due to kaons in color-flavor-locked quark matter
• Neutrino emission from compact stars and inhomogeneous color superconductivity
• Bulk viscosity in 2SC quark matter
• Bulk viscosity in a cold CFL superfluid
• On the unlocking of color and flavor in color-superconducting quark matter
• The quark core of protoneutron stars in the phase diagram of quark matter
• Formation of Quark Phases in compact stars and their connection to Gamma-Ray-Bursts

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