Energy Release Associated with Quark Phase Transition in Neutron Stars: Comparative Analysis of Maxwell and Glendenning Scenarios

TL;DR

This paper investigates the energy release during quark phase transitions in neutron stars, comparing Maxwell and Glendenning scenarios, using advanced nuclear matter models and the MIT bag model to analyze observable effects.

Contribution

It introduces a detailed comparison of energy release in neutron star phase transitions under Maxwell and Glendenning scenarios using improved theoretical models.

Findings

Quantifies energy released during corequakes in both transition scenarios.

Analyzes the impact of phase transition type on neutron star structure.

Provides insights into observable signatures of quark deconfinement.

Abstract

We study the compact stars internal structure and observable characteristics alterations due to the quark deconfinement phase transition. To proceed with, we investigate the properties of isospin-asymmetric nuclear matter in the improved relativistic mean-field (RMF) theory, including a scalar-isovector \delta-meson effective field. In order to describe the quark phase, we use the improved version of the MIT bag model, in which the interactions between u, d and s quarks inside the bag are taken into account in the one-gluon exchange approximation. We compute the amount of energy released by the corequake for both cases of deconfinement phase transition scenarios, corresponding to the Maxwellian type ordinary first-order phase transition and the phase transition with formation of a mixed quark-hadron phase (Glendenning scenario).