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Discovery of the generation of high-energy electrons in a weak flare
Sub-second pulses were recorded for the first time at RATAN-600 with
a temporal resolution of 7 ms in the range from 3.5 to 8 GHz, which
is confirmed by independent observations on the Siberian Solar
spectropolarimeter in the 4-8 GHz range. These pulses emerge in
the impulsive phase of the flare and are superimposed on the flares
of longer duration. A comparison of the temporal profiles and spectra
for the microwave and hard x-ray emission (λα HESSI and FERMI data),
as well as the simulations of gyrosynchrotron emission, show that
the nature of these sub-second oscillations in weak flares is
determined by a common population of electrons and a common
high-temperature source of emission with the temperature greater than 30 MK.
In collaboration with the Institute of Solar-Terrestrial Physics
of the Siberian branch of RAS
(Contact - V.M.Bogod)
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