Physics – Nuclear Physics – Nuclear Theory
Scientific paper
1995-09-07
Astrophysical Journal 469 1996 794-807
Physics
Nuclear Physics
Nuclear Theory
Revtex, 16 pages, 6 figures included
Scientific paper
10.1086/177827
In this work we calculate the total mass, radius, moment of inertia, and surface gravitational redshift for neutron stars using various equations of state (EOS). Modern meson-exchange potential models are used to evaluate the $G$-matrix for asymmetric nuclear matter. We calculate both a non-relativistic and a relativistic EOS. Of importance here is the fact that relativistic Brueckner-Hartree-Fock calculations for symmetric nuclear matter fit the empirical data, which are not reproduced by non-relativistic calculations. Relativistic effects are known to be important at high densities, giving an increased repulsion. This leads to a stiffer EOS compared to the EOS derived with a non-relativistic approach. Both the non-relativistic and the relativistic EOS yield moments of inertia and redshifts in agreement with the accepted values. The relativistic EOS yields, however, too large mass and radius. The implications are discussed.
Bao Gang
Engvik L.
Hjorth-Jensen Morten
Oestaard E.
Osnes E.
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