ar X iv : a st ro - p h / 03 10 14 2 v 1 6 O ct 2 00 3 Magnetorotational mechanism of supernova type

Results of 2D simulations of the magnetorotational mechanism of su-pernova type II are presented. Amplification of toroidal magnetic field of the star due to differential rotation of the star leads to the transformation of the rotational (gravitational) energy to the energy of the supernova explosion. In our simulation the energy of the explosion is 1.12 · 10 51 erg. The explosion ejects about 0.11M⊙. 1 Magnetorotational mechanism The magnotorotational supernova (MRS) explosion model was suggested in [1]. The idea of MRS consists of getting explosion energy from the rotational (gravitational) energy of the collapsed magnetized massive star. 1D numerical simulation of the MRS mechanism has been made in [2],[3]. We have made 2D numerical simulation of the MRS using specially developed implicit conservative Lagrangian scheme on triangular grid with grid reconstruction. Our results show that MRS leads to the energy output of the 1.12 · 10 51 erg and ejection of 0.11M⊙. Core collapse of a star leads to formation of the rapidly (almost rigidly) rotating neutron core and differentially rotating vast envelope. The explosion energy for the supernova is taking form the rotational (gravitational) energy of the magnetized star. The magnetic field plays the role of the " transmission belt " for the rotational (gravitational) energy to the energy of the supernova explosion. Toroidal component of the magnetic field is amplifying with time due to the differential rotation of the star. When force produced by magnetic pressure substantially changes the local balance of forces a compression MHD wave appears and goes through the star's envelope outwards. Moving along steeply decreasing density profile this wave transforms to the MHD shock which produces supernova explosion.