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Fig. 1


Stereogram plots showing the offset between blue and red shifted emission of 30SiO (left), CO (middle), and SO (right). North is up, west is right. The blue and red contours are constructed from 49% of the blue and red wings of the molecular lines, respectively. The black dashed contours are constructed using the remaining 2% of the velocity channels, centred on the vlsr. Offset is measured with respect to the peak continuum brightness position. The contours in the top (bottom) panels are evenly spaced between 3 and 51 (15 and 51) times the rms noise value outside the line (~ 3.5 × 10−3 Jy beam−1). The black contours in the bottom panels have been omitted.

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