Distribution of stars showing rotational modulation in the Prot–Δν space. Open grey dots correspond to the 151 stars discarded according to the crowding criterion. Filled magenta dots are the 19 stars removed according to the Tcrit criterion. Blue dots represent stars for which a reliable rotation period has been derived (361 stars). The grey line indicates the critical period Tcrit and the red line marks a rotational velocity of 80% of the critical value. The open square symbols indicate RGB stars with depressed dipolar modes following Stello et al. (2016b), while star symbols indicate stars with normal dipolar modes.
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