Bulk Properties of Hybrid Stars with the Color-Flavor Locked Quark Matter Core
WANG Hong-Yan1,2**, LIU Guang-Zhou1, WU Yao-Rui1**, XU Yan3, ZHU Ming-Feng1, BAO Tmurbagan4, ZHAO En-Guang5
1College of Physics and College of Computer Science and Technology, Jilin University, Changchun 130012 2College of Physics, Beihua University, Jilin 132013 3Changchun Observatory, National Astronomical Observatories, Chinese Academy of Sciences, Changchun 130117 4Institute for Numerical Calculations, College of Physics and Electronic Information Inner Mongolia University for the Nationalities, Tongliao 028043 5Institute of Theoretical Physics, Chinese Academy of Sciences, Beijing 100190
Abstract：We investigate the influence of the energy gap ( Δ) of the color-flavor locked (CFL) quark phase on the bulk properties of hybrid stars. The relativistic mean field model is used for hadronic matter and the MIT bag model for CFL quark matter. In our calculation results, we find that with the increase of the CFL energy gap there exists a transition behavior, which goes from the hadron star range through the transition range into the CFL quark star range. The observation data of PRS J1614-2230 are in the hadron star range (with Δ<40 MeV). We also find that with hyperons the equation of state (EOS) for the hybrid star matter with the CFL quark matter core has a small change, which can be disregarded.
2013, Vol. 30 
