Melting of antikaon condensate in protoneutron stars

TL;DR

This paper investigates how antikaon condensates melt in hot, neutrino-trapped protoneutron stars using relativistic models, revealing that critical temperatures depend on baryon density and differ from neutron stars.

Contribution

It provides the first detailed analysis of the melting behavior of antikaon condensates in protoneutron stars with phase diagrams and density-dependent critical temperatures.

Findings

Critical temperature increases with baryon density.

Critical temperature is lower in protoneutron stars than in neutron stars.

Phase diagram of protoneutron star with $K^-$ condensate is presented.

Abstract

We study the melting of a $K^-$ condensate in hot and neutrino-trapped protoneutron stars. In this connection, we adopt relativistic field theoretical models to describe the hadronic and condensed phases. It is observed that the critical temperature of antikaon condensation is enhanced as baryon density increases. For a fixed baryon density, the critical temperature of antikaon condensation in a protoneutron star is smaller than that of a neutron star. We also exhibit the phase diagram of a protoneutron star with a $K^-$ condensate.