IRAM PdBI maps of the CO(2 − 1) blue (left panel) and red (right panel) broad wings. The size of the map is 10 × 10 arcsec. Contours correspond to 3σ (1σ = 0.6 mJy beam^-1). The synthesized beam size is shown at the bottom of the maps. The cross indicates the peak of the radio (VLBI) emission. A tapering with uv taper =50 m has been applied to both the maps; the tapering cuts the visibilities with uv radius  <50 m, so the maps appear more detailed and the synthesized beam is slightly smaller than in the original maps. Note that the peaks of the wing maps appear to be slightly offset from the peak of the radio VLBI but are well within the beam.