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Title: MAGNETOROTATIONAL CORE-COLLAPSE SUPERNOVAE IN THREE DIMENSIONS

We present results of new three-dimensional (3D) general-relativistic magnetohydrodynamic simulations of rapidly rotating strongly magnetized core collapse. These simulations are the first of their kind and include a microphysical finite-temperature equation of state and a leakage scheme that captures the overall energetics and lepton number exchange due to postbounce neutrino emission. Our results show that the 3D dynamics of magnetorotational core-collapse supernovae are fundamentally different from what was anticipated on the basis of previous simulations in axisymmetry (2D). A strong bipolar jet that develops in a simulation constrained to 2D is crippled by a spiral instability and fizzles in full 3D. While multiple (magneto-)hydrodynamic instabilities may be present, our analysis suggests that the jet is disrupted by an m = 1 kink instability of the ultra-strong toroidal field near the rotation axis. Instead of an axially symmetric jet, a completely new, previously unreported flow structure develops. Highly magnetized spiral plasma funnels expelled from the core push out the shock in polar regions, creating wide secularly expanding lobes. We observe no runaway explosion by the end of the full 3D simulation 185 ms after bounce. At this time, the lobes have reached maximum radii of ∼900 km.
Authors:
; ; ; ; ; ; ;  [1] ;  [2]
  1. TAPIR, Mailcode 350-17, California Institute of Technology, Pasadena, CA 91125 (United States)
  2. Perimeter Institute for Theoretical Physics, Waterloo, ON (Canada)
Publication Date:
OSTI Identifier:
22365899
Resource Type:
Journal Article
Resource Relation:
Journal Name: Astrophysical Journal Letters; Journal Volume: 785; Journal Issue: 2; Other Information: Country of input: International Atomic Energy Agency (IAEA)
Country of Publication:
United States
Language:
English
Subject:
79 ASTROPHYSICS, COSMOLOGY AND ASTRONOMY; AXIAL SYMMETRY; CAPTURE; COMPUTERIZED SIMULATION; COSMIC GAMMA BURSTS; COSMIC NEUTRINOS; EQUATIONS OF STATE; GRAVITATIONAL COLLAPSE; JETS; KINK INSTABILITY; LEPTON NUMBER; MAGNETOHYDRODYNAMICS; PLASMA; POLAR REGIONS; RELATIVISTIC RANGE; ROTATION; SUPERNOVAE; THREE-DIMENSIONAL CALCULATIONS