Fig. 5

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First-order moment maps of the HCO+ (4−3) emission line (upper panel) and C18O(2–l) emission line (lower panel). The black contours represent the ATLASGAL 870 µm emission, as presented in Fig. 1. Black labels and arrows in the upper panel indicate the identified molecular clumps. Color tonalities represent different LSR radial velocities.
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