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Fig. B.1

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Colour-period diagram of the stars from our sample (magenta stars) together with members of well-studied clusters: Pleiades cluster, M37 cluster, Praesepe cluster, NGC 6811 cluster, Ruprecht 147 cluster and NGC 6819 cluster. Lines represent the 100, 400, 650, and 2500 Myr curves compute from the empirical relation from Angus et al. (2019).

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