论文标题
相对论均值场模型中的超声恒星
The hyperonic star in relativistic mean-field model
论文作者
论文摘要
由于引力波检测以及有关其质量和半径的精确测量，作为超新星残留物的中子恒星最近引起了人们的关注。在中子恒星的内核区域中，可以存在奇怪的自由度，例如超子，也可以称为超音速恒星。在这项工作中，将在相对论平均场（RMF）模型的框架中审查由核子和瘦素组成的中子恒星以及包括Hyperons在内的Hyperonic Star。市场中流行的非线性和密度依赖性RMF参数将被采用，以调查陌生性重子在Hyperonic恒星其质量，半径，潮汐变形性和其他特性中的作用。最后，还将讨论介子和超子之间耦合强度的幅度，当矢量耦合常数强时，它可以以当前的RMF参数集生成庞大的超声恒星。
The neutron star as a supernova remnant is attracting high attention recently due to the gravitation wave detection and precise measurements about its mass and radius. In the inner core region of the neutron star, the strangeness degrees of freedom, such as the hyperons, can be present, which is also named as a hyperonic star. In this work, the neutron star consisting of nucleons and leptons, and the hyperonic star including the hyperons will be reviewed in the framework of the relativistic mean-field (RMF) model. The popular non-linear and density-dependent RMF parametrizations in the market will be adopted to investigate the role of strangeness baryons in a hyperonic star on its mass, radius, tidal deformability, and other properties. Finally, the magnitudes of the coupling strengths between mesons and hyperons also will be discussed, which can generate the massive hyperonic star with present RMF parameter sets, when the vector coupling constants are strong.
