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| Paper: |
Magnetorotational Explosions of Core-collapse Supernovae |
| Volume: |
474, Numerical Modeling of Space Plasma Flows (ASTRONUM2012) |
| Page: |
47 |
| Authors: |
Bisnovatyi-Kogan, G. S.; Moiseenko, S. G.; Ardeljan, N. V. |
| Abstract: |
Core-collapse supernovae are accompanied by formation of neutron
stars. The gravitation energy is transformed into the energy of
the explosion, observed as SN II, SN Ib,c type supernovae.
We present results of 2-D MHD simulations, where the energy source is
rotation, and magnetic field serves as a “transition belt” for
the transformation of the rotation energy into the energy of explosion.
The toroidal part of the magnetic energy initially grows linearly with time
due to differential rotation.
When the twisted toroidal component strongly exceeds the poloidal field,
magneto-rotational instability develops,
leading to a drastic acceleration in the growth of magnetic energy.
Finally, a fast MHD shock is formed that produces a supernova
explosion. A mildly collimated jet is produced for a dipole-like initial field. |
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