有限温度下强超子-超子相互作用对中子星的影响

The Influence of the Strong Hyperon-hyperon Interaction on the Neutron Star at Finite Temperature

文章在相对论平均场的框架内研究了有限温度下强超子-超子(YY)相互作用对中子星物质的影响.结果表明,包含强YY相互作用后,(1)星体会被进一步的超子化;(2)星体最大质量变小而相应的半径变大.另一方面,随着温度的升高,YY项对中子星物质的主要影响迅速减弱.在高于约46MeV时,强YY项在中子星里的效果是可以忽略的.

In the framework of the relativistic mean field theory, the influence of the strong hyperon-hyperon （YY） interaction on the neutron star at finite temperature is studied. Results show that the inclusion of the strong YY interaction makes, （1） star matter is further hyperonized and （2） the maximum mass decreases while the corresponding radius increases. On the other hand, with the increase of temperature, the influence of the strong YY interaction is highly suppressed. When temperature is higher than 46MeV, the strong YY interaction has nearly no influence on neutron star matter.