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致密物质性质和适用于超新星及中子星研究的状态方程
Properties of Dense Matter and Equation of State for Supernovae and Neutron Stars
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摘要: 采用相对论平均场方法研究了致密物质的性质,构造了包括较宽温度、同位旋不对称度和密度范围的适用于超新星模拟研究的状态方程,均匀物质由相对论平均场理论描述,非均匀物质由托马斯-费米近似给出。讨论了包含超子自由度的中子星物质的状态方程。计算结果表明,包含超子可以有效地软化高密度区的状态方程,Λ超子的超流态有可能存在于大质量中子星内部。Abstract: The properties of dense matter are studied within the relativistic mean-field theory. The equation of state （EOS） of dense matter are constructed covering a wide range of temperature, proton fraction, and density for the use of supernova simulations. The relativistic mean-field theo- ry is employed to describe the uniform matter, while the Thomas-Fermi approximation is adopted to describe the non-uniform matter. The EOS of neutron star matter is discussed with the inclu- sion of hyperons. It is found that the EOS at high density can be significantly softened by the in- clusion of hyperons. The 1S0 superfluidity of A hyperons may exist in massive neutron stars.
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