Date: July 23, from 16:00
Place: RIKEN main building 4F conference room 435,437
Notice that the place is different from usual, please.
Leturer: N. Yasutake (Chiba Inst. Tech.)
Title: Thermodynamical description of hadron-quark phase transition and its implications
on compact-star phenomena
Abstract:
One of the most promising possibilities may be the appearance of quark
matter in astrophysical phenomena in the light of recent progress in
observations. The properties of deconfinement is not well understood,
but the thermodynamical aspects of hadron-quark (HQ) phase transition
have been extensively studied in recent years. Then the mixed phase of
hadron and quark matter becomes important; the proper treatment is
needed to describe the HQ phase transition and derive the equation of
state (EOS) for hadron-quark matter, based on the Gibbs conditions for
phase equilibrium. We here use a realistic EOS for hyperonic matter in
the hadron phase. For quark matter we further try to improve the
previous EOS by considering other effective models of QCD. One of the
interesting consequences may be the appearance of the inhomogeneous
structures called ”pasta”, which are brought about by the surface and
the Coulomb interaction effects. We present here a comprehensive review
of our recent works about the HQ phase transition in various
astrophysical situations: cold catalyzed matter, hot matter and neutrino
-trapped matter. We show how the pasta structure becomes unstable by the
charge screening of the Coulomb interaction, thermal effect or the
neutrino trapping effect. Such inhomogeneous structure may affect
astrophysical phenomena through its elasticity or thermal properties.
Here we also discuss some implications on supernova explosion,
gravitational wave and cooling of compact stars.
