Fig. A.1
Emission of SO 55 − 44. Channel maps consist of velocity ranges of 1 km s−1 and the moment 0 map is integrated over a velocity range of 8 km s−1. The contours start at 3σ and follow a step of 3σ. The yellow stars show the position of the sources and the solid segment represents the extent of the circumbinary disc. The synthesised beam is represented in the right panel by a solid black ellipse.
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