Complete equation of state for neutron stars using the relativistic Hartree-Fock approximation

Journal Article · Fri May 02 04:00:00 EDT 2014 · AIP Conference Proceedings

DOI:https://doi.org/10.1063/1.4874104· OSTI ID:22280496

Miyatsu, Tsuyoshi; Cheoun, Myung-Ki ^[1]; Yamamuro, Sachiko; Nakazato, Ken'ichiro ^[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 (TUS), Noda 278-8510 (Japan)

We construct the equation of state in a wide-density range for neutron stars within relativistic Hartree-Fock approximation. The properties of uniform and nonuniform nuclear matter are studied consistently. The tensor couplings of vector mesons to baryons due to exchange contributions (Fock terms) are included, and the change of baryon internal structure in matter is also taken into account using the quark-meson coupling model. The Thomas-Fermi calculation is adopted to describe nonuniform matter, where the lattice of nuclei and the neutron drip out of nuclei are considered. Even if hyperons exist in the core of a neutron star, we obtain the maximum neutron-star mass of 1.95M{sub ⊙}, which is consistent with the recently observed massive pulsar, PSR J1614-2230. In addition, the strange vector (φ) meson also plays a important role in supporting a massive neutron star.

• OSTI ID: 22280496
• Journal Information: AIP Conference Proceedings, Journal Name: AIP Conference Proceedings Journal Issue: 1 Vol. 1594; ISSN APCPCS; ISSN 0094-243X
• Country of Publication: United States
• Language: English

Related Subjects

79 ASTRONOMY AND ASTROPHYSICS
ASTROPHYSICS
COSMOLOGY
EQUATIONS OF STATE
HARTREE-FOCK METHOD
HYPERONS
NEUTRON STARS
NEUTRONS
NUCLEAR MATTER
NUCLEI
PULSARS
QUARKS
RELATIVISTIC RANGE
THOMAS-FERMI MODEL
VECTOR MESONS