Magnetically assisted explosions of weakly magnetized stars

Hidetomo Sawai, Shoichi Yamada

    研究成果: Article

    抄録

    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.

    元の言語English
    ページ(範囲)125-130
    ページ数6
    ジャーナルProceedings of the International Astronomical Union
    12
    発行部数S331
    DOI
    出版物ステータスPublished - 2017 2 1

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

    ASJC Scopus subject areas

    • Astronomy and Astrophysics

    これを引用

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

    :: Proceedings of the International Astronomical Union, 巻 12, 番号 S331, 01.02.2017, p. 125-130.

    研究成果: Article

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    AU - Sawai, Hidetomo

    AU - Yamada, Shoichi

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    AB - 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.

    KW - Instabilities

    KW - Methods: Numerical

    KW - MHD

    KW - Supernovae: General

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