2D numerical study for magnetic field dependence of neutrino-driven core-collapse supernova models

J. Matsumoto, T. Takiwaki, K. Kotake, Y. Asahina, H. R. Takahashi

Research output: Contribution to journalArticlepeer-review

4 Citations (Scopus)

Abstract

We study the effects of the magnetic field on the dynamics of non-rotating stellar cores by performing 2D, magnetohydrodynamic (MHD) simulations. To this end, we have updated our neutrino-radiation-hydrodynamics supernova code to include MHD employing a divergence cleaning method with both careful treatments of finite volume and area reconstructions. By changing the initial strength of the magnetic field, the evolution of 15.0, 18.4, and 27.0 M☉ pre-supernova progenitors is investigated. An intriguing finding in our study is that the neutrino-driven explosion occurs regardless of the strength of the initial magnetic field. For the 2D models presented in this work, the neutrino heating is the main driver for the explosion, whereas the magnetic field secondary contributes to the pre-explosion dynamics. Our results show that the strong magnetic field weakens the growth of the neutrino-driven turbulence in the small scale compared to the weak magnetic field. This results in the slower increase of the turbulent kinetic energy in the post-shock region, leading to the slightly delayed onset of the shock revival for models with the stronger initial magnetic field.

Original languageEnglish
Pages (from-to)4174-4194
Number of pages21
JournalMonthly Notices of the Royal Astronomical Society
Volume499
Issue number3
DOIs
Publication statusPublished - 2020 Dec 1
Externally publishedYes

Keywords

  • Stars: magnetic field
  • Stars: massive
  • Supernovae: general

ASJC Scopus subject areas

  • Astronomy and Astrophysics
  • Space and Planetary Science

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