Properties of a relativistic equation of state for collapse-driven supernovae

K. Sumiyoshi, H. Suzuki, Shoichi Yamada, H. Toki

    研究成果: Article

    31 引用 (Scopus)

    抄録

    We study characteristics of the relativistic equation of state (EOS) for collapse-driven supernovae, which is derived by relativistic nuclear many body theory. Recently the relativistic EOS table has become available as a new complete set of physical EOS for numerical simulations of supernova explosion. We examine this EOS table by using general relativistic hydrodynamics of the gravitational collapse and bounce of supernova cores. In order to study dense matter in dynamical situation, we perform simplified calculations of core collapse and bounce by following adiabatic collapse with the fixed electron fraction for a series of progenitor models. This is intended to give us "approximate models" of prompt explosion. We investigate the profiles of thermodynamical quantities and the compositions during collapse and bounce. We also perform the calculations with the Lattimer-Swesty EOS to compare the properties of dense matter. As a measure of the stiffness of the EOS, we examine the explosion energy of the prompt explosion with electron capture totally suppressed. We study the derivative of the thermodynamical quantities obtained by the relativistic EOS to discuss the convective condition in neutron-rich environment, which may be important in the delayed explosion.

    元の言語English
    ページ(範囲)227-251
    ページ数25
    ジャーナルNuclear Physics A
    730
    発行部数1-2
    DOI
    出版物ステータスPublished - 2004 1 12

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    supernovae
    equations of state
    explosions
    gravitational collapse
    electron capture
    stiffness
    hydrodynamics
    neutrons
    profiles
    electrons
    simulation

    ASJC Scopus subject areas

    • Nuclear and High Energy Physics

    これを引用

    Properties of a relativistic equation of state for collapse-driven supernovae. / Sumiyoshi, K.; Suzuki, H.; Yamada, Shoichi; Toki, H.

    :: Nuclear Physics A, 巻 730, 番号 1-2, 12.01.2004, p. 227-251.

    研究成果: Article

    Sumiyoshi, K. ; Suzuki, H. ; Yamada, Shoichi ; Toki, H. / Properties of a relativistic equation of state for collapse-driven supernovae. :: Nuclear Physics A. 2004 ; 巻 730, 番号 1-2. pp. 227-251.
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