中子星的转动惯量与表面红移的研究

On the Moment of Inertia and Surface Redshift of Neutron Star

在温度、密度及同位旋相关的核物质状态方程的基础上，通过求解Ｔｏｌｍａｎ－Ｏｐｐｅｎｈｅｉｍｅｒ－Ｖｏｌｋｏｆｆ方程，得到了中子星的转动惯量与表面红移．计算结果表明，中子星的转动惯量较强地依赖于核物质的不可压缩系数与对称能强度系数，而对核子有效质量不太敏感；中子星的表面红移却对对称能强度系数不太敏感，而较强地依赖于不可压缩系数与核子有效质量．

Using temperature, density and isospin dependent nuclear equation of state, we calculat- ed the moment of inertia and surface redshift of neutron star by resolving Tolman-Oppenheimer- Volkoff equation. It is found that the moment of inertia and surface redshift strongly depend on the nuclear equation of state. The equation of state with high value of uncompressihility and symmetry en- ergy strength coefficient provides a big moment of inertia, while effective mass of nucleon has almost no effect on moment of inertia. Meanwile, the equation of state with high value of uncompressibility and effective mass of nucleon provides a big surface redshift, while the symmetry energy strength co- efficient has almost no effect on surface redshift of neurtun star. The relationship between moment of inertia and mass is also given in this paper. By comparing the calculated results with the one obtained sendempirically from astronomy, we find that a softer equation of state can provide a more reasonable result.