Fig. A.1
Top panel: continuum emission image of Sgr B2 at 4 GHz. The dashed line indicates the trajectory along which we get the intensity profile. Bottom panels: intensity profiles of the twelve channel maps. The uv limit of the twelve images has been set to 0.6–50 kλ and the images have been convolved to a circular beam of 4′′. The dashed line indicates the zero intensity level.
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