Changes in the Parameters of a Compact Star Due to the Quark Deconfinement Phase Transition: Comparative Analysis of Maxwell and Gibbs Scenarios

We are researching how compact stars are affected by the sudden shift in their properties caused by the quark deconfinement phase transition. The hadronic phase is explained using the relativistic mean-field theory, which includes a scalar-isovector δ-meson effective field. To describe the quark phase, we use the MIT bag model, which considers the interactions between u, d and s quarks within the bag in the one-gluon exchange approximation. We analyze the drastic changes in the parameters of the near-critical configuration of the compact star and calculate the amount of energy released by the corequake in the two extreme cases of deconfinement phase transition scenarios. These scenarios correspond to the ordinary first-order phase transition (Maxwell scenario) and the phase transition calculated by using the bulk Gibbs equilibrium conditions and global charge neutrality (Gibbs scenario).