Properties of the outer crust of neutron stars from Hartree-Fock-Bogoliubov mass models

Journal Article · Wed Jun 15 04:00:00 EDT 2011 · Physical Review. C, Nuclear Physics

DOI:https://doi.org/10.1103/PHYSREVC.83.065810· OSTI ID:21502832

Pearson, J M ^[1]; Goriely, S; Chamel, N ^[2]

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1. Departement de Physique, Universite de Montreal, Montreal, Quebec, H3C 3J7 (Canada)
2. Institut d'Astronomie et d'Astrophysique, Code Postal 226, Universite Libre de Bruxelles, B-1050 Brussels (Belgium)

We have calculated the zero-temperature properties of the outer crust of neutron stars for four nuclear-mass models based on the Hartree-Fock-Bogoliubov method: the three most recent Skyrme-force models (HFB-19, HFB-20, and HFB-21) and the Gogny-force model D1M. While the equation of state is substantially the same for the four models, the nuclidic composition varies considerably from one model to another. We solve the Tolman-Oppenheimer-Volkoff equations by integrating inward from the surface and thereby determine the abundance of each nuclide in the outer crust of a typical neutron star of mass 1.5M{sub {center_dot}} and radius 13 km. Although the total mass of the outer crust is slightly model dependent, its thickness is essentially the same for all four models.

• OSTI ID: 21502832
• Journal Information: Physical Review. C, Nuclear Physics, Journal Name: Physical Review. C, Nuclear Physics Journal Issue: 6 Vol. 83; ISSN 0556-2813; ISSN PRVCAN
• Country of Publication: United States
• Language: English

Related Subjects

73 NUCLEAR PHYSICS AND RADIATION PHYSICS
79 ASTRONOMY AND ASTROPHYSICS
ABUNDANCE
COMPUTERIZED SIMULATION
DIMENSIONS
EQUATIONS
EQUATIONS OF STATE
HARTREE-FOCK-BOGOLYUBOV THEORY
MASS
NEUTRON STARS
NUCLEON-NUCLEON POTENTIAL
POTENTIALS
SIMULATION
SKYRME POTENTIAL
STARS
SURFACES
THICKNESS