/ 0 60 90 52 v 1 1 9 Se p 20 06 Nuclear symmetry energy effects on neutron stars properties
نویسندگان
چکیده
We construct a class of nuclear equations of state based on a schematic potential model, that originates from the work of Prakash et. al. [1], which reproduce the results of most microscopic calculations. The equations of state are used as input for solving the Tolman-Oppenheimer-Volkov equations for corresponding neutron stars. The potential part contribution of the symmetry energy to the total energy is parameterized in a generalized form both for low and high values of the baryon density. Special attention is devoted to the construction of the symmetry energy in order to reproduce the results of most microscopic calculations of dense nuclear matter. The obtained nuclear equations of state are applied for the systematic study of the global properties of a neutron star (masses, radii and composition). The calculated masses and radii of the neutron stars are plotted as a function of the potential part parameters of the symmetry energy. A linear relation between these parameters, the radius and the maximum mass of the neutron star is obtained. In addition, a linear relation between the radius and the derivative of the symmetry energy near the saturation density is found. We also address on the problem of the existence of correlation between the pressure near the saturation density and the radius.
منابع مشابه
/ 0 60 90 52 v 2 2 A pr 2 00 7 Nuclear symmetry energy effects on neutron stars properties
We construct a class of nuclear equations of state based on a schematic potential model, that originates from the work of Prakash et. al. [1], which reproduce the results of most microscopic calculations. The equations of state are used as input for solving the Tolman-Oppenheimer-Volkov equations for corresponding neutron stars. The potential part contribution of the symmetry energy to the tota...
متن کامل/ 0 60 90 44 v 1 1 7 Se p 20 06 Thermodynamic properties of nuclear matterat finite temperature
Thermodynamic quantities in symmetric nuclear matter are calculated in a self-consistent T−matrix approximation at zero and finite temperatures. The internal energy is calculated from the Galitskii-Koltun’s sum rule and from the summation of the diagrams for the interaction energy. The pressure and the entropy at finite temperature are obtained from the generating functional form of the thermod...
متن کامل- th / 0 60 90 79 v 1 2 9 Se p 20 06 1 FEW BODY RESERCH - SUMMARY
Few-body research history, achievements, current development and challenges are presented .
متن کامل0 60 90 33 v 1 1 3 Se p 20 06 Hadronization in cold nuclear matter ⋆
I review a recently proposed scaling analysis of hadron suppression in Deeply Inelastic Scattering on nuclear targets measured at the HERMES experiment. The analysis can distinguish 2 competing explanations for the observed suppression, namely, quark radiative energy loss with long hadron formation times, and prehadron nuclear absorption with hadronization starting inside the nucleus. Experimen...
متن کامل