From left to right: CO(2–1) and 1.3 mm continuum maps obtained with ALMA, complemented by HST/NICMOS image when available. The CO(2–1) and 1.3 mm emission is > 5σ. The color bar is normalized to the maximum value of each ALMA map: in order to derive the real maximum value, a factor scale, shown in the top-right of each panel, has to be applied. The cross symbol in the three panels represents the stellar peak emission identified using the HST/NICMOS image. The beam size and the physical scale in kpc are also shown in the left panel. In all panels, north is up and east to the left.