Physics – Nuclear Physics – Nuclear Theory
Scientific paper
2009-09-30
Nucl.Phys.A834:664c-666c,2010
Physics
Nuclear Physics
Nuclear Theory
3 pages, 2 figures, contribution to the 10th International Conference on Nucleus-Nucleus Collisions (NN2009), Beijing, China,
Scientific paper
10.1016/j.nuclphysa.2010.01.118
We show that the widely used parabolic approximation to the Equation of State (EOS) of asymmetric nuclear matter leads systematically to significantly higher core-crust transition densities and pressures. Using an EOS for neutron-rich nuclear matter constrained by the isospin diffusion data from heavy-ion reactions in the same sub-saturation density range as the neutron star crust, the density and pressure at the inner edge separating the liquid core from the solid crust of neutron stars are determined to be 0.040 fm$^{-3}$ $\leq \rho_{t}\leq 0.065$ fm$^{-3}$ and 0.01 MeV/fm$^{3}$ $\leq P_{t}\leq 0.26$ MeV/fm$^{3}$, respectively. Implications of these constraints on the Vela pulsar are discussed.
Chen Lie-Wen
Li Bao-An
Ma Hong-Ru
Xu Jun
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