Effects of the symmetry energy on the kaon condensates in the quark-meson coupling model

Abstract

In this work we investigate protoneutron star properties within a modified version of the quark-meson coupling (QMC) model that incorporates an $\ensuremath{\omega}\text{\ensuremath{-}}\ensuremath{\rho}$ interaction plus kaon condensed matter at finite temperature. Fixed entropy and trapped neutrinos are taken into account. Our results are compared with the ones obtained with the GM1 parametrization of the nonlinear Walecka model for similar values of the symmetry energy slope. Contrary to GM1, within the QMC model the formation of low mass black holes during cooling are not probable. It is shown that the evolution of the protoneutron star may include the melting of the kaon condensate driven by the neutrino diffusion, followed by the formation of a second condensate after cooling. The signature of this complex process could be a neutrino signal followed by a gamma ray burst. We have seen that both models can, in general, describe very massive stars.