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arXiv · 2007.04775

A 3D Simulation of a Neutrino-Driven Supernova Explosion Aided By Convection and Magnetic Fields

Bernhard Müller·Vishnu Varma
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Abstract

We study the impact of a small-scale dynamo in core-collapse supernovae using a 3D neutrino magnetohydrodynamics simulation of a $15 M_\odot$ progenitor. The weak seed field is amplified exponentially in the gain region once neutrino-driven convection develops, and remains dominated by small-scale structures. About $250\, \mathrm{ms}$ after bounce, the field energy in the gain region reaches $\mathord{\sim} 50\%$ of kinetic equipartition. This supports the development of a neutrino-driven explosion with modest global anisotropy, which does not occur in a corresponding model without magnetic fields. Our results suggest that magnetic fields may play a beneficial subsidiary role in neutrino-driven supernovae even without rapid progenitor rotation. Further investigation into the nature of magnetohydrodynamic turbulence in the supernova core is required.

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Bernhard Müller, Vishnu Varma. 2020-08-09. A 3D Simulation of a Neutrino-Driven Supernova Explosion Aided By Convection and Magnetic Fields. https://doi.org/10.1093/mnrasl%2Fslaa137

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