Strange quark star and the parameter space of the quasi-particle model |
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Authors: | Wen-Hua Cai Qing-Wu Wang |
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Affiliation: | College of physics, Sichuan University, Chengdu 610064, China |
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Abstract: | 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 ${rm{J}}0740+6620$ 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 ${{rm{Lambda }}}_{1.4}={190}_{-120}^{+390}$ and support a maximum mass above $1.97,{M}_{odot }$. 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. |
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Keywords: | strange quark compact star tidal deformability quasi-particle model neutron star |
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