Nonuniform matter in neutron star crusts studied by the variational method with thomas-fermi calculations

Hiroaki Kanzawa, Masatoshi Takano, Kazuhiro Oyamatsu, Kohsuke Sumiyoshi

    Research output: Contribution to journalArticle

    20 Citations (Scopus)

    Abstract

    The equation of state (EOS) for neutron star (NS) crusts is studied in the Thomas-Fermi (TF) approximation using the EOS for uniform nuclear matter obtained by the variational method with the realistic nuclear Hamiltonian. The parameters associated with the nuclear three-body force, which are introduced to describe the saturation properties, are finely adjusted so that the TF calculations for isolated atomic nuclei reproduce the experimental data on masses and charge distributions satisfactorily. The resulting root-mean-square deviation of the masses from the experimental data for mass-measured nuclei is about 3 MeV. With the use of the nuclear EOS thus obtained, the nuclear species in the NS crust at zero temperature are determined. The predicted proton numbers of the nuclei in the NS crust are close to the gross behavior of the results obtained by Negele and Vautherin, while they are larger than those for the EOS obtained by Shen et al. owing to the difference in the symmetry energy. The density profile of NS is calculated with the constructed EOS.

    Original languageEnglish
    Pages (from-to)673-691
    Number of pages19
    JournalProgress of Theoretical Physics
    Volume122
    Issue number3
    DOIs
    Publication statusPublished - 2009 Sep

    Fingerprint

    neutron stars
    crusts
    equations of state
    nuclei
    mass distribution
    charge distribution
    deviation
    saturation
    protons
    symmetry
    profiles
    approximation
    temperature
    energy

    ASJC Scopus subject areas

    • Physics and Astronomy (miscellaneous)

    Cite this

    Nonuniform matter in neutron star crusts studied by the variational method with thomas-fermi calculations. / Kanzawa, Hiroaki; Takano, Masatoshi; Oyamatsu, Kazuhiro; Sumiyoshi, Kohsuke.

    In: Progress of Theoretical Physics, Vol. 122, No. 3, 09.2009, p. 673-691.

    Research output: Contribution to journalArticle

    Kanzawa, Hiroaki ; Takano, Masatoshi ; Oyamatsu, Kazuhiro ; Sumiyoshi, Kohsuke. / Nonuniform matter in neutron star crusts studied by the variational method with thomas-fermi calculations. In: Progress of Theoretical Physics. 2009 ; Vol. 122, No. 3. pp. 673-691.
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