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… 

Figures from this paper

Color superconductivity in a self-consistent NJL-type model
In this paper, the NJL-type model is used to investigate the color superconductivity. The four-fermion interactions of the NJL-type model are Fierz-transformed into two different classes, i.e., the
Properties of strange quark matter and strange quark stars
A Polyakov chiral $$\text {SU(3)}$$ SU(3) quark mean-field (PCQMF) model is applied to study the properties of strange quark matter (SQM) and strange quark star (SQS) in $$\beta $$ β
Phase space and quark mass effects in neutrino emissions in a color superconductor
We study the phase space for neutrino emissions with massive quarks in direct Urca processes in normal and color superconducting quark matter. We derive in QCD and the NJL model the Fermi momentum
The recent observation of the pulsar PSR J1614-2230 with a mass of 1.97 ± 0.04 M ☉ gives a strong constraint on the quark and nuclear matter equations of state (EoS). We explore the parameter ranges
Equation of state and hybrid star properties with the weakly interacting light U-boson in relativistic models
Abstract.It has been a puzzle whether quarks may exist in the interior of massive neutron stars, since the hadron-quark phase transition softens the equation of state (EOS) and reduce the neutron
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
Isoscalar-vector interaction and hybrid quark core in massive neutron stars
The hadron-quark phase transition in the core of massive neutron stars is studied with a newly constructed two-phase model. For nuclear matter, a nonlinear Walecka type model with general
Quark star matter at finite temperature in a quasiparticle model
We study the thermodynamic properties of asymmetric quark matter, large mass quark stars (QSs), and proto-quark stars (PQSs) within the quasiparticle model. Considering the effects of temperature