Peak temperature for the different gas tracers observed with ALMA. The size of the synthesized beam is shown in the bottom left corner of each panel. The color bars are in units of kelvin. The white contours in the first panel (black contours in the other panels) correspond to the 20%, 40%, 70%, and 90% of the CO(2–1) peak temperature. Top left panel: headlight cloud as identified by CPROPS (black ellipse). Offset positions are from the galactic center.