A new equation of state for neutron star matter with nuclei in the crust and hyperons in the core

Abstract

The equation of state for neutron stars in a wide-density range at zero temperature is constructed. The chiral quark-meson coupling model within relativistic Hartree-Fock approximation is adopted for uniform nuclear matter. The coupling constants are determined so as to reproduce the experimental data of atomic nuclei and hypernuclei. In the crust region, nuclei are taken into account within the Thomas-Fermi calculation. All octet baryons are considered in the core region, while only ${\Xi }^{-}$ appears in neutron stars. The resultant maximum mass of neutron stars is $1.95M_{\odot }$, which is consistent with the constraint from the recently observed massive pulsar, PSR J1614-2230.

27 pages, 10 figures, 3 tables, accepted for publication in ApJ. EOS tables are available at http://asphwww.ph.noda.tus.ac.jp/myn/

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