Position of the high-frequency inflection point (P_HFIP) plotted against rotation period. Only sample B is shown here. Rotation periods are taken from Reinhold & Gizon (2015) (left panel) and McQuillan et al. (2014) (right panel). Colours represent the stellar effective temperature, T_eff. The Sun is represented by the solar symbol ⊙. Dashed lines in both panels indicate a linear fit constrained to go through the origin of the coordinate system. A logarithmic visualization is available in the appendix, see Fig. A.1.