The problem, however, is that red dwarfs can produce significant X-ray emission, and often have large flares of radiation and eruptions of particles in so - called coronal mass ejections (CMEs). (sciencedaily.com)
Previously, such large flares had not been observed in Sol - type main sequence stars, although they are common in a group of dim main - sequence, reddish M dwarfs known as flare stars. (solstation.com)
Finding high - energy electrons that aren't associated with large flares suggests that the solar corona is, at least partly, heated by nanoflares. (sciencedaily.com)