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Fig. 5

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Summary of the variations in [Fe/H] as a function of the Δcol variation along the RG1 region on the PCM from 30 pairs of FG stars with similar atmospheric parameters. The plotted values are the absolute differences in [Fe/H] and Δcol between the two stars in each pair. Pairs formed with stars in NGC 3201 are plotted as filled blue circles.

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