Fig. 8
V − I and B − V diagram of NGC 6530 members presented in this work. Solid line is the locus of photospheric colors from Kenyon & Hartmann (1995) reddened by using the mean cluster reddening E(B − V) = 0.35 (Sung et al. 2000) and the Munari & Carraro (1996) reddening law for R = 5.0 (see Sect. 3.5). The reddening vector assuming E(B − V) = 1 is also drawn. Empty circles indicate objects with evident excess in the optical colors.
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