INFLUENCE OF NUCLEAR SYMMETRY ENERGY ON PROPERTIES OF NEUTRON STAR OUTER CORE MATTER
Journal Title: International Journal of Applied and Natural Sciences - Year 2019, Vol 8, Issue 3
Abstract
Based on the mean-field approximation of relativistic σ-ω-ρ model with the nonlinear self-interaction of σ meson and density-dependent coupling constants respectively, the nuclear symmetry energy S, its slope L and curvature K as well as the proton fraction xp and the pressure P of the matter in the outer core of neutron star are studied. It is found that greater S in high-density region and L at saturation density produce greater proton fraction and pressure of neutron star outer core matter. And the density threshold of proton super fluidity and the direct URCA process, which are model dependent, decrease as the nuclear symmetry energy increases.
Authors and Affiliations
Jun-Jie Guo, Wei Chen
Keywords
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