Strange quark star and the parameter space of the quasi-particle model  

作　　者：Wen-Hua Cai Qing-Wu Wang 

机构地区：[1]College of physics,Sichuan University,Chengdu 610064,China

出　　处：《Communications in Theoretical Physics》2021年第10期125-131,共7页理论物理通讯（英文版）

基　　金：supported by the Cultivating Plan of Characteristic Direction of Science(2020SCUNL209)。

摘　　要：The properties of strange quark stars are studied within the quasi-particle model. Taking into account chemical equilibrium and charge neutrality, the equation of state(EOS) of(2+ 1)-flavor quark matter is obtained. We illustrate the parameter spaces with constraints from two aspects: one is based on the astronomical results of PSR J0740+ 6620 and GW 170 817,and the other is based on the constraints proposed from the theoretical study of a compact star that the EOS must ensure the tidal deformability Λ_(1.4)=190_(-120)^(+390) and support a maximum mass above 1.97M⊙. It is found that neither type of constraints can restrict the parameter space of the quasi-particle model in a reliable region and thus we conclude that the low mass compact star cannot be a strange quark star.

关 键 词：strange quark compact star tidal deformability quasi-particle model neutron star 

分 类 号：P145.6[天文地球—天体物理] O572.33[天文地球—天文学]