The authors parameterize the photometric distortion waves in the short-period RS CVn system BH Vir by a dark, circular spot model for the active regions on the...
Long-term Variation of Solar Activity by a Dynamo Based on Magnetic Flux Tubes
We show that cyclic activity and Maunder-type grand minima can be explained by a dynamo driven by the instability of magnetic flux tubes in the overshoot layer...