Stellar Population Astrophysics (SPA) with the TNG - Measurement of the He I 10 830 Å line in the open cluster Stock 2

Open Access

Fig. 9

EW(He) of the main He 10 830 component versus $\log R_{HK}^{'}$ $\log R_{{\rm{HK}}}^\prime$ for Stock 2 RC stars. For comparison, dwarf stars from Smith (2016) are plotted in grey. The r values indicate the Pearson correlation coefficients of the linear fitting for the RC and dwarf stars.

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