Speaker
Description
We discuss the properties of the static neutron stars and strangeness-mixed stars, based on the equations of state derived from a pion mean-field approach. The model parameters are fixed according to the phenomenological observation related to the pion-nucleus scattering and the bulk properties of nuclear matter near the saturation point. We examine the energy and pressure behavior inside a neutron star. We show that in the framework of the present approach the central densities in various neutron stars vary within the range of 3 to 4 normal nuclear matter densities. The mass-radius relations are also obtained and discussed. The slope parameter dependence of the radii of the neutron stars with their fixed masses are discussed. We also study the strangeness-mixed stars or the hyperon stars using the same sets of parameters. As the strangeness content of strange matter increases, the binding energy per nucleon is saturated and the corresponding equation of state becomes softer.