"Magnetic
explosions and physics of Gamma-Ray Bursts
M. Lyutikov (McGill Univ., MIT, CITA)
Abstract:
I will review the
dynamical role of magnetic fields in extracting the energy of a
relativistic rotating progenitor (like black hole ili super-massive
neutron star), in collimating the outflow and in producing the observed
high energy emission. In particular, I will concentrate on the dynamics of
relativistic explosions in the wind zone assuming that most energy is
released by the GRB progenitor in a form
of toroidal magnetic fields (relativistic magnetic bubble). Dissipative
current instabilities developing at large distances near the axes of the
flow result in particle acceleration and high energy emission.