ρ介子对中子星物态方程的影响

在相对论平均场理论框架内采用σ-ω-ρ模型进行数值计算,确定引入ρ介子对中子星能量密度和压强变化的影响,进而研究其对中子星壳层的物态方程的影响。计算结果表明:ρ介子使中子星能量密度随着重子数密度的增大而增大,同时压强也随着重子数密度的增大而变化更大更显著,从而使中子星的物态方程变硬。

p Meson on Neutron Star Equation of State

The σ-ω-ρ model is adopted in the numerical calculation within the frame work of relativistic mean field theory.Explored how the ρ meson affect neutron stars energy density and pressure changes,and thus tested its effects on equation of neutron stars state.The result shows,with the effect of ρ meson,the energy density of neutron stars is increasing as the increasing of baryon density,and the pressure changes become more significant.There-fore,the equation of neutron stars state becomes stiffer.