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Fig. 2.

image

Hertzsprung–Russel diagrams for stars inside the seven boxes as shown in Fig. 1. The dashed line is an isochrone for [M/H] = 0 and 8 Gyr, the solid line shows an isochrone for [M/H] = + 0.2 and 8 Gyr. The Colour bar shows the number of stars in each bin.

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