Electrically charged strange stars with an interacting quark matter equation of state

Abstract

The properties of electrically charged strange quark stars predicted by an interacting quark matter equation of state (EOS) based on cold and dense perturbative quantum chromodynamics (pQCD) are investigated. The stability of charged strange stars is analyzed considering that there is an electric charge distribution inside the star proportional to the third power of the radial coordinate. A comparison with the predictions derived using the MIT bag model is also presented. We show that the presence of a net electric charge inside strange stars implies in configurations with a larger maximum mass in comparison to their neutral counterparts. Moreover, we demonstrate that the pQCD EOS implies in larger values for the maximum mass of charged strange stars, with very heavy charged stars being stable systems against radial oscillations. For the considered electric charge distribution, the pQCD EOS implies unstable configurations for large values of the renormalization scale as well as for large values of the proportionality constant $\beta$, in contrast to the MIT bag model predictions.