Influence of magnetorotational instability on neutrino heating: A new mechanism for weakly magnetized core-collapse supernovae

Hidetomo Sawai, Shoichi Yamada

研究成果: Article査読

21 被引用数 (Scopus)

抄録

We investigated the impact of magnetorotational instability (MRI) on the dynamics of weakly magnetized, rapidly rotating core-collapse supernovae by conducting high-resolution axisymmetric MHD simulations with simplified neutrino transfer. We found that an initially sub-magnetar-class magnetic field is drastically amplified by MRI and substantially affects the dynamics thereafter. Although the magnetic pressure is not strong enough to eject matter, the amplified magnetic field efficiently transfers angular momentum from small to large radii and from higher to lower latitudes, which causes the expansion of the heating region due to the extra centrifugal force. This then enhances the efficiency of neutrino heating and eventually leads to neutrino-driven explosion. This is a new scenario of core-collapse supernovae that has never been demonstrated by past numerical simulations.

本文言語English
論文番号L10
ジャーナルAstrophysical Journal Letters
784
1
DOI
出版ステータスPublished - 2014 3月 20

ASJC Scopus subject areas

  • 天文学と天体物理学
  • 宇宙惑星科学

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