Studied region of RCW 122. Left panel: composite images in red, green, and blue colors show emission at 8.0, 4.5, and 3.6 µm (Spitɀer/IRAC), respectively. Green contours represent the 870 µm dust continuum emission from the ATLASGAL survey, with levels of 0.6 (~8 r ms), 1.2, 2.3, 4.8, 8, and 15 Jy beam⁻¹. White arrows and labels indicate the position of ATLASGAL clumps identified by Contreras et al. (2013) and the HC₃N spots reported by Sollins & Megeath (2004) (see text). Right panel: SuperCosmos Hα emission image (blue color) superimposed on the VLASS radio continuum image at 3 GHz (red color). As presented in the left panel, the green contours represent the 870 µm emission.