Minimum period Pmin versus relative differential rotation α. The colors represent different temperature bins, the dotted black lines marks our detection limits. The dashed blue area shows theoretical predictions from Küker & Rüdiger (2011) for models with 0.3 M⊙ (bottom) to 1.1 M⊙ (top). We find that α increases with rotation period for stars cooler than 6700 K. The black lines show linear fits to our measurements, discarding stars hotter than 6700 K (dash-dotted line) and using all data points (dashed line), respectively.
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