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Fig. 4

image

Histograms of the extracted surface rotation periods, Prot, for the full sample (grey), hot (red), dwarf (blue), and subgiant stars (green) as defined in Fig. 3. For comparison with our sample of dwarfs, the solar rotational rate (25.4 days) is represented in black in the central panel at an arbitrary Y axis of 5. In the left and right panels, the Sun is plotted in grey as guidance for the eyes only.

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