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Time-scales of stellar rotational variability and starspot diagnostics
2017
Monthly Notices of the Royal Astronomical Society: Letters
The difference in stability of starspot distribution on the global and hemispherical scales is studied in the rotational spot variability of 1998 main-sequence stars observed by Kepler mission. It is found that the largest patterns are much more stable than smaller ones for cool, slow rotators, whereas the difference is less pronounced for hotter stars and/or faster rotators. This distinction is interpreted in terms of two mechanisms: (1) the diffusive decay of longliving spots in activity
doi:10.1093/mnrasl/slx170
fatcat:tcye43ncivgrhlmrgly665rdfq