Fig. 10.

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Normalized Ca II H&K emission () as a function of Prot. ‘D’ and ‘P’ rotators are omitted from the plot. The relation from Astudillo-Defru et al. (2017a) is overplotted in grey. To illustrate the offset with that relation for our fully convective stars in the unsaturated regime, we also show the best-fit power law for 18 ‘S’ rotators with M⋆ ≤ 0.35 M⊙ and Prot > 40 d in dashed red lines.
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