Fig. 4
SiO (5–4) emission (contours) in channel maps of 2.6 km s-1 width, overlaid on the 4.5 μm emission from Spitzer/IRAC. SiO contours start at 3σ (σ = 0.188 Jy beam-1) and are then separated by steps of 1σ up to a value of 8σ. The central velocity of each channel map is indicated in the upper left corner, while the ellipse in the lower right corner shows the synthesized beam.
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