Bag model and quark star

Abstract

In this paper, incorporating the property of the vacuum negative pressure, namely, the bag constant, we presented a new model of the equation of state (EOS) of quark matter at finite chemical potential and zero temperature. By comparing our EOS with Fraga {\it et~al.}'s EOS and SQM1 model, one find that our EOS is softer than Fraga {\it et~al.}'s EOS and SQM1 model. The reason for this difference is analyzed. With these results we investigate the structure of quark star. A comparison between our model of quark star and other models is made. The obtained mass of quark star is $1.3\sim 1.66M_{\odot }$ and the radius is $9.5\sim 14Km$. One can see that our star's compactness is smaller than that of other two models.

11 pages, 4 figures

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• EXO 0748-676 Rules out Soft Equations of State for Neutron Star Matter
• Quark matter in compact stars?
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• Calculation of bulk viscosity of QCD at zero temperature and finite chemical potential
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• Influence of light quark loops on the Wigner phase with Dyson-Schwinger equations approach
• Kaon-meson coupling from SU(3) flavour symmetry and application to antikaon condensed dense matter in neutron star