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Fig. C.2

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Channel maps between 7.81 and 12.61 km s−1 for the ALMA C18O (2 − 1) spectral cube. The white star represents the location of the protostar. The white dotted circle marks the extent of the primary beam. The white ellipse at the bottom left corners represents the beam size. The scalebar shows a 500 au length in the map.

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