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Fig. 7.


Color magnitude diagrams for five selected young stellar groups. Each row presents from left to right: CMD for the group region, for its corresponding comparison field and the resulting difference. Blue and red symbols indicate selected blue and red objects, respectively. The curves indicate the 107 yr and 109 yr isochrones for solar metallicity (Z = 0.0152) from Tang et al. (2014) displaced according the adopted distance and reddening for NGC 247. The amount of total (T), blue (B) and red (R) stars are also presented. The values W and r2 indicate the weight and external radius of the field (see text), respectively. In the right panels, gray histogram is from all objects remaining after subtraction and the blue histogram is only for the blue population. The linear fit for brightest objects (F606W <  26, dashed line) and the obtained slope value (Γ) is shown.

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