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Title: A NEW EQUATION OF STATE FOR NEUTRON STAR MATTER WITH NUCLEI IN THE CRUST AND HYPERONS IN THE CORE

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 Ξ{sup –} appears in neutron stars. The resultant maximum mass of neutron stars is 1.95 M{sub ☉}, which is consistent with the constraint from the recently observed massive pulsar, PSR J1614-2230.
Authors:
 [1] ; ;  [2]
  1. Department of Physics, Soongsil University, Seoul 156-743 (Korea, Republic of)
  2. Department of Physics, Faculty of Science and Technology, Tokyo University of Science, 2641 Yamazaki, Noda, Chiba 278-8510 (Japan)
Publication Date:
OSTI Identifier:
22270698
Resource Type:
Journal Article
Resource Relation:
Journal Name: Astrophysical Journal; Journal Volume: 777; Journal Issue: 1; Other Information: Country of input: International Atomic Energy Agency (IAEA)
Country of Publication:
United States
Language:
English
Subject:
73 NUCLEAR PHYSICS AND RADIATION PHYSICS; 79 ASTROPHYSICS, COSMOLOGY AND ASTRONOMY; BARYON OCTETS; CHIRALITY; COUPLING CONSTANTS; EQUATIONS OF STATE; HARTREE-FOCK METHOD; HYPERNUCLEI; LIMITING VALUES; MESONS; NEUTRON STARS; NUCLEAR MATTER; PULSARS; QUARKS; RELATIVISTIC RANGE; THOMAS-FERMI MODEL; XI BARYONS