A quest for activity cycles in low mass stars

Krisztian Vida, vidakris@konkoly.hu, Konkoly Observatory Hungary

Abstract
Long-term photometric measurements in a sample of ultrashort-period (P~0.5 days or less) single and binary stars of different interior structures are analysed. A loose correlation exists between the rotational rate and cycle lengths of active stars, regardless of their evolutionary state and the corresponding physical parameters. The shortest cycles are expected on the fastest rotators, in the order of 1-2 years, which will be reported in this talk.