The Activity Cycles and Surface Differential Rotation of Single Dwarfs

I present an updated overview of activity cycles in cool stars. Long-term study of magnetic proxies such as Ca II HK emission and photometry are the primary tools for investigating stellar activity cycles. I focus on cycle data from these sources, specifically for single dwarf stars. These restrictions reduce two areas of uncertainty: structural changes due to evolution and the effects of binarity. I explore the relationships between cycle period, cycle amplitude and various stellar properties, including rotation and surface differential rotation (SDR). Cycle period relationships are somewhat ambiguous; similar restrictions on the data set for SDR, however, reveal interesting trends. Speculations on what the results might imply for the dynamo are wildly tossed about.