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Fig. 2

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pEW(Paβ) shown as a function of Teff. Grey dots represent median(pEW(Paβ)) for each star, the coloured circles represent the mean of these median(pEW(Paβ)) measurements for each Teff interval as introduced in the main text. The colours are chosen as in Figs. 3 and 5 to simplify comparison.

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