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Fig. 8

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Shear flow traced by H I, CH, 12CO and 13CO. Note the two different dynamical regimes (exchanging at 0.6 pc) picked by CH and 12CO observations, and the CH which traces better the less dense and fainter gas in the lower part of the cloud, where 12CO is virtually absent, at least at the W(CO) ≥1 K km s−1 level.
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