The effect of deconfinement phase transition on rotochemical deviations in stars containing mixed phase matter

TL;DR

This paper investigates how deconfinement phase transitions in neutron star cores affect chemical deviations and heating, showing that such transitions significantly increase the surface temperature during cooling.

Contribution

It introduces a model linking deconfinement phase transitions to enhanced chemical heating and temperature rise in neutron stars during spin-down.

Findings

Deconfinement transitions increase chemical deviations in neutron star cores.

Chemical energy release from transitions raises the surface temperature.

Deconfinement enhances the chemical heating efficiency in cooling neutron stars.

Abstract

As a neutron star spins down, its core density increase, changing the relative equilibrium concentration, and causing deconfinement phase transition as well. hadron matter are converted into quark matter in the interior, which enhances the deviation of chemical equilibrium state. We study such deviations and its chemical energy release.Applying to the simulation of cooling neutron stars, we find the surface effective temperature of neutron stars is promoted obviously. This implies that the deconfinement phase transition is able to raise the chemical heating efficiency.