Proton Fraction in Neutron Stars

作     者：ZHANG Feng-Shou CHEN Lie-Wen 张丰收;陈列文

作者机构：Center of Theoretical Nuclear PhysicsNational Laboratory of Heavy Ion AcceleratorLanzhou 730000 Institute of Modern PhysicsChinese Academy of SciencesLanzhou 730000 CCAST(World Laboratory)P.O.Box 8730Beijing 100080 

出 版 物：《Chinese Physics Letters》 (中国物理快报（英文版）)

年 卷 期：2001年第18卷第1期

页      面：142-144页

核心收录：

学科分类：07[理学] 070202[理学-粒子物理与原子核物理] 0702[理学-物理学] 

基　　金：Supported by the National Natural Science Foundation of China under Grant Nos.19875068 and 19847002 the Major State Basic Research Development Program under Contract No.G2000077407 the Foundation of the Chinese Academy of Sciences 

主　　题：symmetry implies interior 

摘      要：The proton fraction inβ-stable neutron stars is investigated within the framework of the Skyrme-Hartree-Fock theory using the extended Skyrme effective interaction for the first *** calculated results show that the proton fraction disappears at high density,which implies that the pure neutron matter may exist in the interior of neutron *** incompressibility of the nuclear equation-of-state is shown to be more important to determine the proton ***,it is indicated that the addition of muons in neutron stars will change the proton *** is also found that the higher-order terms of the nuclear symmetry energy have obvious effects on the proton fraction and the parabolic law of the nuclear symmetry energy is not enough to determine the proton fraction.