Velocity-integrated [C II] flux maps (central 8″ × 8″ regions) are shown in different velocity ranges, from the combined cubes obtained by stacking (a) the full sample, (b) the low-SFR, and (c) the high-SFR groups. Left and right panels: representative of the high-velocity tails of the [C II] emission ([ − 600 :   − 200] and [ + 200 :   + 600] km s⁻¹, respectively), while maps in the central panels trace the [C II] core ([ − 200 :   + 200] km s⁻¹). Significance levels of the black contours are reported below the panels of (a). The average synthesized beam is shown in the lower-left corners, while a reference size-scale of 15 kpc is reported at the bottom of each panel. The center of each panel is marked with a white cross.