Abstract
The non-thermal emission in the magnetospheres of presupernova collapsing stars with initial dipole magnetic fields and a certain initial energy distribution of the charged particles in a magnetosphere is considered. The analysis of particle dynamics and its emission in the stellar magnetosphere under collapse show that the collapsing stars can be the powerful sources of a non-thermal radiation produced by the interaction of charged particles with the magnetic field. The radiation flux grows with decreasing stellar radius. This flux can be observed in the form of a radiation burst with duration equal to the stellar collapse time. The radiation flux depends on the distance to the stars, the particle spectrum and the magnetic field in the magnetosphere. The radiation flux is calculated for various collapsing stars with initial dipole magnetic fields and an initial power series, relativistic Maxwell and Boltzmann particle energy distribution in the magnetosphere. This radiation can be observed by means of modern astronomical instruments.
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