The Renormalized Equation of State and Quark Star

By means of the EOS of QCD at zero temperature and finite quark chemical potential we proposed Phys. Rev. D 78 (2008) 054001 in the framework of rainbow-ladder approximation of Dyson–Schwinger approach, we investigate the structure of quark star and its property. It is found that the mass-radius relation in our model is very different from that of usual quark star models, but similar to neutron star models. The obtained mass of quark star is about 1.75M_ʘ ∼ 2.2M_ʘ. The obtained radius of quark star is 22∼26 km, which is obviously larger than the results in other models. The reason for this discrepancy is analyzed.