Neutron stars in relativistic mean field theory with isovector scalar meson

摘要

We study the equation of state(EOS) of β-stable dense matter and models of neutron stars in the relativistic mean field(RMF) theory with the isovector scalar mean field corresponding to the δ-meson[ao(980)]. A range of values of theδ-meson coupling compatible with the Bonn potentials is explored. parameters of the model in the isovector sector are constrained to fit the nuclear symmetry energy, Es≈30 MeV. We find that the quantity most sensitive to the δ-meson coupling is the proton fraction of neutron star matter.