Thermodynamical description of hadron-quark phase transition and its implications on compact-star phenomena

ハドロンークォーク相転移の熱力学的記述と高密度天体現象との関係

安武 伸俊*; 野田 常雄*; 祖谷 元*; 丸山 敏毅  ; 巽 敏隆*

Yasutake, Nobutoshi*; Noda, Tsuneo*; Sotani, Hajime*; Maruyama, Toshiki; Tatsumi, Toshitaka*

Using a baryon-baryon effective interaction for the hadron phase with hyperons and the MIT bag model for the quark phase, we derive the equation of state (EOS) of hadron-quark (HQ) matter, based on the Gibbs conditions for phase equilibrium. One of the interesting consequences may be the appearance of the inhomogeneous structures called "pasta", which are brought about by the balance between the surface and the Coulomb interactions. We explore the properties of cold catalyzed matter, hot matter and neutrino-trapped matter. The pasta structures become unstable by the charge screening of the Coulomb interaction, high temperatures or the neutrino trapping effect. HQ matter with pasta structures may affect astrophysical phenomena through its elasticity or thermal properties. We also discuss some implications on supernova explosion, the gravitational waves and the cooling of compact stars.