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Fig. 8
H−W2 vs. J−W2 diagram for the 314 RCGs in four areas of the APOGEE survey listed in Table 4. We plot only the stars with the magnitude errors ≤0.03 mag. The group of 13 dots at H−W2 = 0.07, J−W2 = 0.56 are dereddened RCGs of clusters M67 and NGC 2506, defining the intrinsic position of RCGs.
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