Preferred model C of ESO 137−001. Upper panel: Hα is shown in color; X-ray in dark gray contours; CO in white contours; and stellar content in black contours. Lower panel: Hα velocity field. See Fig. 5 for the description of the contours and colors. The corresponding time evolution can be found online (observations_modelC.gif). The time evolution of the mass surface densities of the different gas phases can be found online (gasphases_modelC.gif).