Fig. 15.
Channel maps where an unresolved emission void is detected about 0.3″ to the west of the AGB star (indicated by the yellow star). Left: CO channel at 0.5 km s−1, contour levels [3, 9, 24, 48, 96] ×σrms. Right: SiO channel at 0.6 km s−1, contour levels [46, 51, 90] ×σrms. The contour levels have been chosen to highlight the feature.
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