Effect of color superconductivity on the mass and radius of a quark star

  title={Effect of color superconductivity on the mass and radius of a quark star},
  author={Stefan R{\"u}ster and Dirk H. Rischke},
  journal={Physical Review D},
We compare quark stars made of color-superconducting quark matter to normal-conducting quark stars. We focus on the most simple color-superconducting system, a two-flavor color superconductor, and employ the Nambu\char21{}Jona-Lasinio (NJL) model to compute the gap parameter and the equation of state. By varying the strength of the four-fermion coupling of the NJL model, we study the mass and the radius of the quark star as a function of the value of the gap parameter. If the coupling constant… 

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