Abstract
ABSTRACT Magnetars, the likely sources of fast radio bursts, produce both steady highly relativistic magnetized winds and occasional ejection events. We demonstrate that the requirement of conservation of the magnetic flux dominates the overall dynamics of magnetic explosions. This is missed in conventional hydrodynamic models of the ejections as expanding shell with parametrically added magnetic field, as well as one-dimensional models of magnetic disturbances. Magnetic explosions from magnetars come into force balance with the pre-flare wind close to the light cylinder. They are then advected quietly with the wind or propagate as electromagnetic disturbances. No powerful shock waves are generated in the wind.
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