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Fig. 2.

image

Left: NIR color-magnitude diagram of our targets. With dots, we show the objects with accurate photometry (Cutri et al. 2003; Walborn et al. 2013) and, with arrows, we show the positions of objects based on a J >  19 lower limit. Errors on the data points were omitted for clarity but are typically ∼0.05 mag. In blue, we show the MYSOs confirmed in this work and, in black, the unconfirmed MYSO candidates. The green, red, and yellow dots indicate a MS, M-type giant, and WR star, respectively. The magenta dots are other LMC MYSOs (Ward et al. 2016; Reiter et al. 2019) and the cyan dots are SMC MYSOs (Ward et al. 2017; Rubio et al. 2018). The gray stars, squares, and diamonds are the MYSOs of Ramírez-Tannus et al. (2017), Bik et al. (2006), and Cooper et al. (2013) projected at a distance of 50 kpc, respectively. The ZAMS is shown as a black line, and the gray line indicates the position of O V stars of Martins & Plez (2006). The dashed black and gray lines are the reddening lines of an O3 V star for a RV of 3.1 and 5.0, respectively, where the crosses from left to right represent a visual extinction AV of 5, 10, 15, 20, 25, and 30 mag. We note that almost all our MYSO candidates are located above the reddening lines, implying a strong NIR excess. Right: NIR color-color diagram of our targets. The colors and symbols are the same as in the left plot. Most of our targets show evidence of a NIR excess due to their position at the right of the reddening lines.

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