σ＊和φ介子对有限温度中子星转动惯量的影响

Effect of σ~＊,φ Mesons on the Moment of Inertia of Finite-Temperature Neutron Stars

利用相对论平均场理论并考虑重子八重态{N,P,Λ,Σ-,0Σ,Σ+,Ξ-,Ξ0},对有限温度慢旋转中子星的转动惯量进行了计算.研究发现,对于温度为T=15 MeV的慢旋转中子星,当重子数密度大约为0.34 fm3时,σ*和φ介子开始出现,之后,其势场强度随着重子数密度的增加而增大,同时,由于考虑了超子之间的σ*和φ介子自由度的贡献,中子星的最大质量减小,而转动惯量变大.

The influences of σ＊ and φ mesons on the moment of inertia of finite temperature neutron stars are examined in the framework of relativistic mean-field theory for the baryon octet {N,P,Λ,Σ-,Σ0,Σ＋,Ξ-,Ξ0} system.It is found that for a neutron star at T=15 MeV,the σ＊ and φ mesons will appear as the baryon density arrives at 0.34 fm-3.Afterwards,their field strength will rise with increasing baryon density.Considering the contribution of σ＊ and  mesons,the maximum mass of the neutron star decreases and its moment of inertia becomes larger.