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Fig. 4.
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Loci of binaries. CMD of NGC 1718 zoomed around the upper MS. The colored continuous lines are the fiducial lines of binary systems with different mass ratios, as indicated in the inset. The dashed lines represent the locus of binaries with primary masses of 1.19, 1.01, and 0.86 solar masses and mass ratios between 0 and 1.
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