Mean rotation periods ⟨ P1 ⟩ averaged over the quarters Q1–Q14 plotted against color (B−V)0. Previous measurements (Reinhold et al. 2013) only using Q3 data are shown in black, good measurements surviving the criteria described in Sect. 3.1 are shown in green. Red and blue dots show stars with periods very stable in time, which are discussed separately in Sect. 4.4. The dashed blue lines show isochrones from Barnes (2007), and the blue star marks the position of the Sun.
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