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Spectra of the hot plasma power of solar flares according to the experimental data of <Emphasis Type="Italic">CORONAS-F</Emphasis>/SPIRIT
Authors:S A Bogachev  S V Kuzin  A A Pertsov  M S Zykov
Institution:1.Lebedev Physical Institute,Russian Academy of Sciences,Moscow,Russia
Abstract:Results of the search and investigations of the periodic processes in the high-temperature plasma of solar flares are presented. Such plasma with a temperature of more than 5 million K is formed mainly in the corona and is observed on the images of the Sun as sources of soft X rays (SX). In the paper, data from the Russian SPIRIT experiment on the satellite CORONAS-F, that occurred from August 2001 to December 2005, are used. A unique duration and temporal resolution of the observation of the Sun in the SX range were used during the experiment. As a consequence of the processing of these data, especially, several thousand images of the NOAA active regions 9825 and 9830 obtained from February 19 to 22, 2009, stable oscillations with a period of 5–20 min in radiation from flares were successfully discovered and the connection between the type of flare and its power spectrum was established. An interpretation of the obtained results is presented.
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