Influence of phase-transition scenarios on the abrupt changes in the characteristics of compact stars

2nd International Symposium on the Modern Physics of Compact Stars and Relativistic Gravity

物理学;天文学

Alaverdyan, G.B.^1

Yerevan State University, Alex Manoogyan str. 1, Yerevan, Armenia^1

关键词: Charge neutrality;    Critical configurations;    Effective field;    First-order phase transitions;    Gibbs equilibrium;    One gluon exchanges;    Relativistic mean-field theories;    Transition scenarios;   

Others  :  https://iopscience.iop.org/article/10.1088/1742-6596/496/1/012001/pdf
DOI  :  10.1088/1742-6596/496/1/012001

学科分类：天文学(综合)

来源: IOP

【 摘 要 】

We study the abrupt changes in the characteristics of compact stars due to the quark deconfinement phase transition. The hadronic phase is described within the relativistic mean-field theory, including a scalar-isovector δ-meson effective field. To describe the quark phase, we use 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 analyze catastrophic changes of the parameters of the near-critical configuration of compact star and compute the amount of the energy released by a corequake for the two extreme cases of the deconfinement phase transition scenarios. The first one corresponds to the ordinary first-order phase transition (Maxwell scenario) and the second one corresponds to the phase transition calculated using the bulk Gibbs equilibrium conditions and global charge neutrality (Glendenning scenario).