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Fig. A.1
Spectral types (SpT) and masses of O stars in W49A, as determined in Wu et al. (2016). Symbols and data are as in Fig. 1. Both 1.6 GHz continuum emission (left panel; THOR; Wang et al. 2018) and GLIMPSE Spitzer IRAC 8.0 μm emission (right panel; Benjamin et al. 2003; Churchwell et al. 2009) are shown in color-scale.
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