(J× [J−Ks]) color−magnitude diagram of the stars in the direction of the RCW 41 region. Small dots show all the stars observed in the target field. The squares represent the NIR-excess sources identified on the basis of the NIR CC diagram, whereas the polygon are the sources that are using NIR plus IRAC bands. The thin solid lines are the PMS isochrones of Pisa models (see Bell et al. 2014 for a detailed description) for stars of solar metallicity and ages of 1, 3, 5, and 7 Myr from right to left, corrected for a distance 1.3 kpc and average reddening AV = 8.5 mag. The reddening vectors corresponding to the 0.01, 0.1, 0.2, 0.5, 1, 2, and 4 M⊙ of the 1 Myr isochrone are drawn in dotted slanting lines.
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