Magnetically assisted explosions of weakly magnetized stars

Hidetomo Sawai, Shoichi Yamada

    Research output: Contribution to journalArticle

    Abstract

    We carried out high resolution simulations of weakly-magnetized core-collapse supernovae in two-dimensional axisymmetry in order to see the influence of the magnetic field and rotation on the explosion. We found that the magnetic field amplified by magnetorotational instability (MRI) has a great positive impact on the explosion by enhancing the neutrino heating, provided that the progenitor has large angular momentum close to the highest value found in stellar evolution calculations. We also found that even for progenitors neither involving strong magnetic flux nor large angular momentum, the magnetic field is greatly amplified by the convection aand rotation, and this leads to the boost of the explosion again by enhancing the neutrino heating.

    Original languageEnglish
    Pages (from-to)125-130
    Number of pages6
    JournalProceedings of the International Astronomical Union
    Volume12
    Issue numberS331
    DOIs
    Publication statusPublished - 2017 Feb 1

    Fingerprint

    explosions
    explosion
    magnetic field
    stars
    angular momentum
    neutrinos
    magnetic fields
    heating
    stellar evolution
    acceleration (physics)
    supernovae
    magnetic flux
    convection
    high resolution
    symmetry
    simulation
    calculation

    Keywords

    • Instabilities
    • Methods: Numerical
    • MHD
    • Supernovae: General

    ASJC Scopus subject areas

    • Astronomy and Astrophysics

    Cite this

    Magnetically assisted explosions of weakly magnetized stars. / Sawai, Hidetomo; Yamada, Shoichi.

    In: Proceedings of the International Astronomical Union, Vol. 12, No. S331, 01.02.2017, p. 125-130.

    Research output: Contribution to journalArticle

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