Equation of state for nuclear matter in core-collapse supernovae by the variational method

H. Togashi, Y. Takehara, S. Yamamuro, K. Nakazato, H. Suzuki, K. Sumiyoshi, Masatoshi Takano

    Research output: Contribution to journalArticle

    Abstract

    We construct a new nuclear equation of state (EOS) for core-collapse supernova (SN) simulations using the variational many-body theory. For uniform nuclear matter, the EOS is constructed with the cluster variational method starting from the realistic nuclear Hamiltonian composed of the Argonne v18 two-body potential and the Urbana IX three-body potential. The masses and radii of neutron stars calculated with the obtained EOS at zero temperature are consistent with recent observational data. For non-uniform nuclear matter, we construct the EOS in the Thomas-Fermi approximation. In this approximation, we assume a functional form of the density distributions of protons, neutrons, and alpha-particles, and minimize the free energy density in a Wigner-Seitz cell with respect to the parameters included in the assumed density distribution functions. The phase diagram of hot nuclear matter at a typical temperature is reasonable as compared with that of the Shen EOS.

    Original languageEnglish
    Article number012058
    JournalJournal of Physics: Conference Series
    Volume569
    Issue number1
    DOIs
    Publication statusPublished - 2014

    Fingerprint

    supernovae
    equations of state
    density distribution
    approximation
    neutron stars
    alpha particles
    flux density
    distribution functions
    free energy
    phase diagrams
    neutrons
    radii
    temperature
    protons
    cells
    simulation

    ASJC Scopus subject areas

    • Physics and Astronomy(all)

    Cite this

    Equation of state for nuclear matter in core-collapse supernovae by the variational method. / Togashi, H.; Takehara, Y.; Yamamuro, S.; Nakazato, K.; Suzuki, H.; Sumiyoshi, K.; Takano, Masatoshi.

    In: Journal of Physics: Conference Series, Vol. 569, No. 1, 012058, 2014.

    Research output: Contribution to journalArticle

    Togashi, H. ; Takehara, Y. ; Yamamuro, S. ; Nakazato, K. ; Suzuki, H. ; Sumiyoshi, K. ; Takano, Masatoshi. / Equation of state for nuclear matter in core-collapse supernovae by the variational method. In: Journal of Physics: Conference Series. 2014 ; Vol. 569, No. 1.
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    AU - Yamamuro, S.

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    AU - Suzuki, H.

    AU - Sumiyoshi, K.

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