Fig. 3
Dereddened B−V vs. V−Ks (top) and V−Ks vs. [Fe/H] (bottom) for binaries (red squares), maybe binaries (blue triangles) and single stars (black X). A separation (dashed line) between single stars and binaries is shown for V−Ks0 = 1.08. CS 22874−042 is shown as an asterisc and CD −48 2445 is indicated by a larger, filled triangle.
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