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Speaker |
Xue, She-Sheng |
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Co-autors |
H. Kleinert, Jorge. A. Rueda H., R. Ruffini |
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Talk Title |
The roles of gravitational, strong and electroweak interactions in Neutron Star |
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Abstract |
Applying both general relativity and non-linear $\sigma$-model of nuclear physics to massive Neutron Star cores over the nuclear density,we study the density distributions of baryons and leptons and electrostatic properties based on the global neutrality condition. Einstein-Maxwell equations and dynamical equation for massive $sigma$ field together with equilibrium conditions for Fermi-energies of particles, including the $\beta$-equilibrium establish a closed set of differential equations. Numerically solving these equations we show: (1) the size of massive cores is determined by gravity; (2) sharp density distribution on core’s surface is determined by the $\sigma$ field; (3) an overcritical electric field appears on surface due to the fact that electrons are blind to strong force. In addition, we calculate pressure , energy density and Equation of State and study the stiffness of cores and the relation between total mass and size of cores. |
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