Spottedness and Flare Activity of Solar-Type Stars with Exoplanets

Abstract

Based on lists of objects from the archives of the LAMOST survey telescope and the TESS, Kepler, and K2 space missions, the manifestations of the spot activity of solar-type stars with exoplanets with pronounced flare activity have been studied. Diagrams (spottedness parameter S-flare energy) and (spottedness parameter S-rotation period \({{P}_{{{\text{rot}}}}}\)) have been considered. As in the case of solar-type stars with superflares and other active stars, among the considered objects, the most active ones rotate faster, they are younger and the area of spots on their surface is bigger. The difference is that the spottedness of most stars with planetary systems does not reach the maximal values of the spottedness parameter for stars with superflares. Of the six objects with the light curves available in the TESS mission archive, the TIC 410214986 (DS Tuc) solar-type star with pronounced photospheric and chromospheric activity, which is a member of the Tucana–Horologium group with an age of ~45 mln years, attracts special attention.