High-order Effects of Symmetry Energy in Proton Fraction of Neutron Stars

• 作者: ZhangFengshou LiWenfei
• 来源期刊: 近代物理研究所和兰州重离子加速器实验室年报：英文版
• 学科: 物理学
• 关键词: 能量对称 中子星 质子 相对论 大统一场
• 年，卷（期）: 2003,（1）
• 页码范围: 20
• 页数: 1页
• 分类号: O572.24

摘要

Many theoretical methods, such as the non-relativistic Brueckner approach, relativistic Brueckner approach, variational many body, the relativistic mean field theory, non-relativistic many body theory and the quarkmeson coupling model, have been used to explore the properties of neutron stars. In the present work, we shall study the properties of neutron stars within the framework of Hartree-Fock theory using the extended Skyrme effective interaction[1]. Many theoretical studies indicate that the relation between the single nucleon energy and the relative neutron excess satisfies the parabolic law approximately when δ and density p is not too high, the δ^4 and higher-order terms of δ are negligible, we shall show the higher-order terms of symmetry energy are important in studying neutron stars.