Fig. A.1
Locus of the binary components in several equivalent width diagnostic plots. These plots are the Na 22076 μm + Ca 2.2634 μm versus CO(4–2) + CO(2–0) (upper right), Al 2.1169 μm versus Mg 2.1066 μm (upper left), Mg 2.2814/Ca 2.2634 μm versus Mg 2.1066/Al 2.1169 μm (lower left), and Si 2.1885/Ti 21903 μm versus Mg 2.1066/Al 2.1169 μm (lower right). The ONC binary components (in black) are labeled, as well as the spectral type of the dwarf (red), giant (turquoise), and intermediate-gravity (blue) spectral type templates.
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