Equation of state of neutron star matter, and the nuclear symmetry energy

Journal Article · Wed Jun 15 00:00:00 EDT 2011 · Physical Review. C, Nuclear Physics

DOI:https://doi.org/10.1103/PHYSREVC.83.065809· OSTI ID:21502831

Loan, Doan Thi; Tan, Ngo Hai; Khoa, Dao T ^[1]; Margueron, Jerome ^[2]

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1. Institute for Nuclear Science and Technique, VAEC, 179 Hoang Quoc Viet Road, Nghia Do, Hanoi (Viet Nam)
2. Institut de Physique Nucleaire, IN2P3-CNRS/Universite Paris-Sud, F-91406 Orsay (France)

The nuclear mean-field potentials obtained in the Hartree-Fock method with different choices of the in-medium nucleon-nucleon (NN) interaction have been used to study the equation of state (EOS) of the neutron star (NS) matter. The EOS of the uniform NS core has been calculated for the npe{mu} composition in the {beta} equilibrium at zero temperature, using version Sly4 of the Skyrme interaction as well as two density-dependent versions of the finite-range M3Y interaction (CDM3Yn and M3Y-Pn), and versions D1S and D1N of the Gogny interaction. Although the considered effective NN interactions were proven to be quite realistic in numerous nuclear structure and/or reaction studies, they give quite different behaviors of the symmetry energy of nuclear matter at supranuclear densities that lead to the soft and stiff scenarios discussed recently in the literature. Different EOS's of the NS core and the EOS of the NS crust given by the compressible liquid drop model have been used as input of the Tolman-Oppenheimer-Volkov equations to study how the nuclear symmetry energy affects the model prediction of different NS properties, like the cooling process as well as the gravitational mass, radius, and moment of inertia.

• OSTI ID: 21502831
• Journal Information: Physical Review. C, Nuclear Physics, Vol. 83, Issue 6; Other Information: DOI: 10.1103/PhysRevC.83.065809; (c) 2011 American Institute of Physics; ISSN 0556-2813
• Country of Publication: United States
• Language: English

Related Subjects

73 NUCLEAR PHYSICS AND RADIATION PHYSICS
EQUATIONS OF STATE
FORECASTING
HARTREE-FOCK METHOD
LIQUID DROP MODEL
MASS
MEAN-FIELD THEORY
MOMENT OF INERTIA
NEUTRON STARS
NUCLEAR MATTER
NUCLEAR STRUCTURE
NUCLEON-NUCLEON INTERACTIONS
NUCLEONS
SKYRME POTENTIAL
SYMMETRY
APPROXIMATIONS
BARYON-BARYON INTERACTIONS
BARYONS
CALCULATION METHODS
ELEMENTARY PARTICLES
EQUATIONS
FERMIONS
HADRON-HADRON INTERACTIONS
HADRONS
INTERACTIONS
MATHEMATICAL MODELS
MATTER
NUCLEAR MODELS
NUCLEON-NUCLEON POTENTIAL
PARTICLE INTERACTIONS
POTENTIALS
STARS