Anisotropic kinetic pressure in ideal MHD and application to entropy production in neutrino-driven wind in supernovae

Kazunori Kohri, Shoichi Yamada, Shigehiro Nagataki

    Research output: Contribution to journalArticle

    5 Citations (Scopus)

    Abstract

    We study the stress tensor of electron in strong magnetic fields which are greater than the critical value Bc≃4.4×1013 G. We claim that such a strong magnetic field induces the anisotropic kinetic pressure term of electron in magnetohydrodynamic equations and can generate entropy in collisional quantum plasmas. We discuss its consequence to the neutrino-driven wind in core-collapse supernovae and argue that it can produce large entropy per baryon, S∼400kB. This mechanism might successfully account for the production of the heavy nuclei with mass numbers A=80-250 through the r-process nucleosynthesis.

    Original languageEnglish
    Pages (from-to)433-441
    Number of pages9
    JournalAstroparticle Physics
    Volume21
    Issue number4
    DOIs
    Publication statusPublished - 2004 Jul

    Fingerprint

    supernovae
    neutrinos
    entropy
    kinetics
    stress tensors
    heavy nuclei
    nuclear fusion
    magnetic fields
    magnetohydrodynamics
    baryons
    electrons

    ASJC Scopus subject areas

    • Nuclear and High Energy Physics

    Cite this

    Anisotropic kinetic pressure in ideal MHD and application to entropy production in neutrino-driven wind in supernovae. / Kohri, Kazunori; Yamada, Shoichi; Nagataki, Shigehiro.

    In: Astroparticle Physics, Vol. 21, No. 4, 07.2004, p. 433-441.

    Research output: Contribution to journalArticle

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