【57页精品】Post-Newtonian treatment of bar mode instability in rigidly rotating equilibrium configurations for polytropic stars

Abstract: We determine the onset point of secular instability for the nonaxisymmetricbar mode in rigidly rotating equilibrium configurations in the Post-Newtonianapproximation, in order to apply it to neutron stars. The treatment is based ona precedent Newtonian analytic energy variational method which we have extendedto the Post-Newtonian case. This method, based upon Lan..