Equilibrium composition and neutrino emissivity of interacting quark matter in neutron stars

Abstract

view Abstract Citations (57) References (23) Co-Reads Similar Papers Volume Content Graphics Metrics Export Citation NASA/ADS Equilibrium composition and neutrino emissivity of interacting quark matter in neutron stars Duncan, R. C. ; Shapiro, S. L. ; Wasserman, I. Abstract It is shown that a detailed treatment of the equilibrium composition of a quark liquid is crucial to the accurate evaluation of its neutrino emissivity. It is demonstrated that when massive s-quarks are present in cold quark matter, the electron fraction vanishes above a finite baryon density. This results in a vanishing total emissivity at high densities, to lowest order in kT. The phase transition at which s-quarks first appear is also studied in detail. The dependences of the composition and emissivity of quark matter on the strange quark mass m(s) and QCD coupling constant (at neutron star densities) are calculated. If m(s) is small and strange quarks are at least marginally relativistic, the neutrino emissivity of quark matter may be appreciably lower than has been previously calculated. The implications of the results for neutron star cooling calculations are discussed. Publication: The Astrophysical Journal Pub Date: April 1983 DOI: 10.1086/160875 Bibcode: 1983ApJ...267..358D Keywords: Elementary Particle Interactions; Neutrinos; Neutron Stars; Quarks; Stellar Temperature; Supernova Remnants; Abundance; Baryons; Electron Capture; Particle Emission; Stellar Evolution; Weak Interactions (Field Theory); X Ray Sources; Astrophysics full text sources ADS |