2020/06/30 by V. P. Gonçalves, V. P. Goncalves, Lucas Lazzari +1
Earth and Planetary Sciences · Physics and Astronomy · #Astrophysics #Cold Atom Physics and Bose-Einstein Condensates #Computer science #Equation of state #High-pressure geophysics and materials #Nuclear physics #Particle physics #Physics #Pulsars and Gravitational Waves Research #Quantum electrodynamics #Quantum mechanics #Quark #Quark star #Stars #State (computer science) #Strange matter #Strange quark #astro-ph.HE #hep-ph
paper · pdf · doi:10.1103/physrevd.102.034031
published as Phys. Rev. D 102, 034031 (2020) · 9 pages, 4 figures. Improved version to be published in Physical Review D
openalex created_date 2020/06/05 · arxiv created 2020/08/17 · openalex publication_date 2020/08/27 · arxiv updated 2020/09/02 · openalex updated_date 2026/08/06
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 strange stars is analyzed considering different models for the electric charge distribution inside the star as well as for distinct values for the total electric charge. 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 is implied in a larger maximum mass in comparison to their neutral counterparts. Moreover, we demonstrate that the pQCD EoS implies larger values for the maximum mass of charged strange stars, with very heavy charged stars being stable systems against radial oscillations. For an electric charge distribution given by q(r)=\ensuremathβr3, the pQCD EoS implies unstable configurations for large values of the renormalization scale as well as for large values of \ensuremathβ, in contrast to the MIT bag model predictions.