Inner crust of neutron stars with mass-fitted Skyrme functionals
Abstract
The equation of state and composition of the inner crust of neutron stars at zero temperature are calculated, using the T = 0 version of the temperature-dependent extended Thomas-Fermi plus Strutinsky integral method, for each of a family of three functionals based on Skyrme-type forces BSk19, BSk20, and BSk21, which are characterized by different degrees of symmetry-energy stiffness, and also for the SLy4 functional. We also solve the Tolman-Oppenheimer-Volkoff equations to calculate the distribution of mass within the inner crust. Qualitatively similar results are found for all four functionals, and in particular the number of protons per Wigner-Seitz cell is in all cases equal to 40 throughout the inner crust.
- Publication:
-
Physical Review C
- Pub Date:
- June 2012
- DOI:
- 10.1103/PhysRevC.85.065803
- arXiv:
- arXiv:1206.0205
- Bibcode:
- 2012PhRvC..85f5803P
- Keywords:
-
- 26.60.Gj;
- 04.40.Dg;
- 21.10.Dr;
- 21.30.-x;
- Neutron star crust;
- Relativistic stars: structure stability and oscillations;
- Binding energies and masses;
- Nuclear forces;
- Nuclear Theory
- E-Print:
- 35 pages, 13 figures, accepted for publication in Physical Review C