ρ介子对中子星物态方程的影响

摘要

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.%Theσ-ω>-p model is adopted in the numerical calculation within the frame work of relativistic mean field theory. Explored how the p 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 p meson, the energy density of neutron stars is increasing as the increasing of baryon density, and the pressure changes become more significant Therefore , the equation of neutron stars state becomes stiffer.