The connection between starspots and superflares: a case study of two stars

How do the characteristics of starspots influence triggering stellar flares? Here we investigate activity two K-type stars, similar in every way from mass to rotation periods and planetary systems. Both stars exhibit about a hundred spots, however, Kepler-411 produced 65 superflares, while Kepler-210 presented none. The spots both were characterized using transit mapping technique, which yields intensity, temperature, radius starspots. average was $(17\pm7) \times 10^3$ km $(58 \pm 23) km, intensity ratio with respect photosphere $(0.35\pm0.24)$ $I_{c}$ $(0.64\pm0.15)$ $I_{c}$, temperature $(3800 700)$ K $(4180 240)$ for Kepler-210, respectively. Therefore, on star no are mostly larger, less dark, warmer than those flaring star, Kepler-411. This may indicate magnetic fields smaller magnitude complexity when compared Thus, starspot area appears not be main culprit superflares triggering. Perhaps active regions is more important.