Investigation of flare activity of the red dwarf star EV Lac based on original observations and using the data from ground-based and space surveys
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Abstract
The problem of energetics of flare activity of dwarf stars in the lower main sequence of the Hertzsprung-Russell diagram is relevant in the context of the detection of powerful flares (superflares) and the possibility of assessing such phenomena on the Sun in the past and future. A brief historical review of the EV Lac original researches is presented, and the modern databases containing information on photometric observations of the star are described. The main attention is paid to the observations of EV Lac made by the TESS observatory. Results of the analysis of flare activity of the star according to the data of the TESS project are presented. The most typical flares have been demonstrated. The dependence of flare activity of EV Lac on the phase of its axial rotation has been studied. The dependence of the number of flares on the phase and energy is illustrated. The segment of the phase of the EV Lac light curve, which contains flares with the highest energies, is indicated.
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