Abstract
The possibility of evaluating the energy spectra of precipitating electrons which form rayed auroral structures has been substantiated. The data of triangulation observations by equipment recording radiation in a wide range of wavelengths (380–580 nm) have been used. A technique for calculating the height profiles of deposition energy from the height profiles of the volume emission rate recorded by the receiving equipment. The energy spectra of precipitating electron fluxes responsible for the formation of rayed structures in auroras have been reconstructed. It is shown that the energy spectra of the precipitating electron flux can be approximated by the sum of two electron fluxes having a power-law energy spectrum and a Maxwellian energy distribution. It has been suggested that radiant structures in auroras are formed due to the discharge of electrons into the ionosphere, which have a power-law energy distribution.
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Dashkevich, Z.V., Ivanov, V.E. & Kozelov, B.V. Studying Rayed Structures in Auroras by Triangulation Methods: 2. Energy Spectra of Precipitating Electrons. Cosmic Res 59, 307–311 (2021). https://doi.org/10.1134/S0010952521050038
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DOI: https://doi.org/10.1134/S0010952521050038