Density plot of the correlation between [C II] integrated intensities and IRAC 8 µm (IC 1396A and E) or IRC 9 µm (IC 1396B and D) at 25″ resolution. The solid line is the relation derived in the Orion A region by Pabst et al. (2021), adapted to this study (see the main text). The dotted line indicates the slope of a linear relation (slope of unity in the log scale) with an arbitrary scaling (offset in the log scale).