【作者】 贾焕玉；

【Author】 JIA Huan-yu(Institute of Morden Physics, Southwest Jiaotong University,Chengdu 610031, China)

【机构】 西南交通大学现代物理研究所；

【摘要】 从相对论平均场理论出发,考虑核子、超子和介子的相互作用,研究了有限温度中子星核心奇异粒子的出现及其作用,讨论了由超核实验数据分析得来的各种不同超子耦合对中子星性质的影响,发现∑的一个强排斥势会抑制其在中子星物质中的出现.对于不同的超子耦合,计算得到中子星最大质量为1.8-1.9M(?),半径为1 5km左右,与观测结果相符.更多还原

【Abstract】 Hot neutron stars are studied in the framework of the relativistic mean field theory of interacting nucleons, hyperons, and mesons. We discuss different hyperon couplings from analysis of various experimental data on hypernuclei, and find that small amount of the sigma baryons appear in hot neutron star matter, when it experiences a strong repulsive potential. There is the change in maximum mass of the neutron stars, but the change is insignificant against the different hyperon couplings. The calculated maximum massof the neutron star is 1.82-1.90M■, radium about 15km, which lies within the range of the observational results.更多还原