Fig. 15
The reddening-free color of (J−H)−1.77(H−KS) vs. KS−0.78(J−H) magnitude. The stars with spectra are marked with red filled dots, gray dots are all stars in the selected regions, the blue triangles represent the stars from the comparison filed. The solid line is a separation line between early OB stars and late-type main sequence stars and red clump giants (see the text).
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