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 journalArticlepeer-review

22 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

ASJC Scopus subject areas

  • Physics and Astronomy (miscellaneous)

Fingerprint

Dive into the research topics of 'Nonuniform matter in neutron star crusts studied by the variational method with thomas-fermi calculations'. Together they form a unique fingerprint.

Cite this