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Title:EFFECTS OF QCD PHASE TRANSITION ON THE EJECTED ELEMENTS FROM THE ENVELOPES OF COMPACT STARS
DOI No:10.1142/9789812793379_0019
Source:PHYSICS OF SELF-ORGANIZATION SYSTEMS (pp 219-225)
Author(s):N. YASUTAKE
www.heap.phys.waseda.ac.jp/yasutake/opening.html

Science and Engineering, Waseda University, Tokyo 169-8555, Japan

S. YAMADA
Science and Engineering, Waseda University, Tokyo 169-8555, Japan

T. NODA
Department of Physics, Kyushu University, Fukuoka 810-8560, Japan

M. HASHIMOTO
Department of Physics, Kyushu University, Fukuoka 810-8560, Japan

K. KOTAKE
Division of Theoretical Astronomy, National Astronomical Observatory of Japan, Tokyo 181-8588, Japan

Abstract:We perform hydrodynamical collapse and bounce simulations of neutron stars induced by QCD phase transition. We study how the phase transition affects the elements of the envelopes and crusts of neutron stars near the epoch of core-bounce. We assume the first-order phase transition, a chirally symmetric quark-gluon plasma for quark phase. The initial elements are adopted from the realistic evolutional calculations of neutron stars containing the cooling effects and the nucleosynthesis of envelope such as type I X-ray burst. We find that the elements of envelope can eject directly (without nucleosynthesis) for such a collapse and bounce by the transition.
Keywords:QCD phase transition; nucleosynthesis; quark star; neutron star
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