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Fig. 17.

image

Left: position of stars in the sample presented in Sect. 2 in the colour-colour ([F770W]−[F1800W], [F770W]−[F1130W]) plane. The symbols for the stars and the evolutionary tracks are the same as in Fig. 16. Right: zoom of the same plane shown in the left panel, to outline the bifurcation between stars of different metallicity.

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