Suspected magnetic cycles on dKe-dMe stars
Magnetic activity is a common property of low main-sequence stars. According to the age and structure stars are distinguished into inаctive, active and high active stars. Indicators of activity in different layers of the atmosphere give clear evidences that dKe-stars are the most active among the dwarfs. Some stars demonstrate long cycles, 60–80 years, but such cycles may be supposed suspected ones or considered as long trends, since series of observations have a comparable length. Short cycles operate on a scale similar to the average 11-year solar cycle or shorter. Common feature for the Sun and some stars are multiperiodic variations of cyclic lengths and power. The question arises what cycle is a basic one and modulates activity of star. The progress in studying stellar magnetic activity and responsible processes can be provided with further systematic observations of different group of stars.
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