Open Access

Fig. A.1


28SiO channel maps observed with a spectral resolution of 7.3 km s−1. The clean beam of 3.8′′ × 2.8′′ is shown in the bottom left corner of the maps, and the primary beam of 56′′ is reported as a dashed white circle in the bottom left panel. The contours are 10, 20, and 40, 60 and 120, and 250 and 350σ (rms = 0.9 mJy beam−1) in the three panels.

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