Electrically charged compact stars with an interacting quark equation of state

Abstract

We investigate the properties of non-rotating, electrically charged strange quark stars in fourdimensional Einstein-Maxwell theory. For quark matter we adopt the well-motivated quantum chromodynamics (QCD) equation-of-state, while for the charge density we assume it is proportional to the mass density. The system of coupled structure equations are integrated numerically, and we compute the mass, the radius as well as the total electric charge of the stars. Moreover, we perform a detailed numerical study of the effect of electric charge using the interacting quark equation-of-state. We find that stars as heavy as two solar masses can be supported, and that the highest radius and highest mass of the stars increase with the charge density.

Stellar Structure and Stability of Charged Interacting Quark Stars and Their Scaling Behaviour

“…We shall investigate three benchmark models that are most widely used in the literature [17][18][19][20][21][22].…”

“…Considering the abundance of positively charged (up) quarks and the associated strong interaction effects, the possibility that charged quark stars exist remains an interesting open question. Indeed, there have been a number of studies on charged quark stars [18][19][20][21][22][23]. However, none of them unified pQCD corrections and color superconductivity effects.…”

Structural properties of charged compact stars with color-flavour-locked quarks matter

“…However, in the stellar configuration, charge can be as high as 10 20 Coulomb to bring in any change in the mass-radius relation [37]. The situation is even more extreme if strange stars were made of interacting quark EoS [38].…”