Anisotropic neutrino radiation in rotational core collapse

Kei Kotake, Shoichi Yamada, Katsuhiko Sato

    Research output: Contribution to journalArticle

    87 Citations (Scopus)

    Abstract

    We have done a series of two-dimensional hydrodynamic simulations of the rotational collapse of a supernova core and estimated the anisotropy of neutrino radiation from nonspherical neutrino spheres. We have employed a realistic equation of state and approximated electron captures and neutrino transport by the so-called leakage scheme. We have calculated heating rates outside the neutrino sphere, assuming that neutrinos are emitted isotropically from each point on the neutrino sphere. We have found that neutrinos heat matter near the rotational axis more strongly than those near the equatorial plane. This might induce a globally anisotropic explosion.

    Original languageEnglish
    Pages (from-to)304-316
    Number of pages13
    JournalAstrophysical Journal
    Volume595
    Issue number1 I
    DOIs
    Publication statusPublished - 2003 Sep 20

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    Keywords

    • Methods: numerical
    • Neutrinos
    • Stars: rotation
    • Supernovae: general

    ASJC Scopus subject areas

    • Space and Planetary Science

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