Effects of the and ϕ Mesons on the Properties of Massive Protoneutron Stars
Effects of the and ϕ Mesons on the Properties of Massive Protoneutron Stars
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DOI：
10.3847/1538-4357/aa880c
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发表时间：
2017-09
期刊：
影响因子：
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通讯作者：
Xueling Mu;H. Jia;Xia Zhou;Hui Wang
中科院分区：
文献类型：
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作者：
Xueling Mu;H. Jia;Xia Zhou;Hui Wang
本文在相对论平均场理论框架下研究了大质量中子星和质子中子星的性质。在一定的耦合参数条件下，考虑到超子和介子的影响，得到了一个两个太阳质量的冷中子星星。通过外推该耦合参数模型，研究了不同演化阶段的大质量质子中子星中，质子和介子的相互作用。通过两种不同的方法确定耦合常数，并研究了它们对状态方程、质量、半径和温度的影响。在中子星星的不同演化阶段，奇异介子的作用是不同的。给出了与PSR J 0348 +0432质量相当的质子中子星星的性质。
The properties of massive neutron stars and protoneutron stars are studied in this work in the framework of relativistic mean-field theory. For certain choices of coupling parameters, a two-solar mass cold neutron star is obtained in the presence of hyperons, taking into account the influence of and ϕ mesons. The model for the coupling parameters is then extrapolated to study the effects of and ϕ mesons on the properties of massive protoneutron stars in different evolutionary stages. The coupling constants are determined by two different methods, and their corresponding influence on the equation of state, mass, radius, and temperature is studied. The effect of the strange mesons is different at different evolution stages of the neutron star. The properties of a protoneutron star corresponding to the mass of PSR J0348+0432 are also presented.