Abstract
The active regions of FK Comae Berenices show a flip-flop behaviour, i.e the concentrated part of spot-activity shifts exactly to the other side of stellar surface, and then remains on the same longitude for a time interval from a few years to a decade. The activity shows excellent phase coherence with respect to these two active longitudes separated 180 degrees from each other. FK Comae may provide a physical example of a non-linear dynamo, which shows surprisingly simple observational changes in the pattern of the magnetically induced spot configurations.
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© 1991 Springer-Verlag
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Jetsu, L., Pelt, J., Tuominen, I., Nations, H. (1991). The spot activity of FK Comae Berenices. In: Tuominen, I., Moss, D., Rüdiger, G. (eds) The Sun and Cool Stars: activity, magnetism, dynamos. Lecture Notes in Physics, vol 380. Springer, Berlin, Heidelberg. https://doi.org/10.1007/3-540-53955-7_161
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DOI: https://doi.org/10.1007/3-540-53955-7_161
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