{
  "id": "2007.04775",
  "version": "v1",
  "published": "2020-07-09T13:20:17.000Z",
  "updated": "2020-07-09T13:20:17.000Z",
  "title": "The Role of Magnetic Fields in Neutrino-Driven Supernovae",
  "authors": [
    "Bernhard Müller",
    "Vishnu Varma"
  ],
  "comment": "6 pages, 3 figures, submitted to MNRAS Letters",
  "categories": [
    "astro-ph.HE",
    "astro-ph.SR"
  ],
  "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.",
  "revisions": [
    {
      "version": "v1",
      "updated": "2020-07-09T13:20:17.000Z"
    }
  ],
  "analyses": {
    "keywords": [
      "magnetic fields",
      "neutrino-driven supernovae",
      "3d neutrino magnetohydrodynamics simulation",
      "beneficial subsidiary role",
      "modest global anisotropy"
    ],
    "note": {
      "typesetting": "TeX",
      "pages": 6,
      "language": "en",
      "license": "arXiv",
      "status": "editable"
    }
  }
}