ChMs for stars in the central field (left panels) and in the outer field (right panels). The binaries selected in Figs. 3a, 6a, 7a, and 8a are represented with large magenta triangles. The remaining candidate binaries are plotted with black circles. The dashed red lines separate the bulk of single 1P and 2P stars, which are located below and above the lines, respectively. The pink points show simulated 1P binaries.