First and second columns: Moment maps of LAsMA ¹²CO (3–2) and ¹³CO (3–2) emission. The radius of the entire region is 0.1° (~6.28 pc). The big red circle marks the region with a 0.05° (~3.14 pc) radius, and the small red circle shows the region with a 0.01° (~0.63 pc) radius. Third and fourth columns: moment maps of ALMA 7 m+12 m HCO⁺ J = 1–0 and H¹³CO⁺ J = 1–0 emission. The radius of the entire region is 0.01° (~0.63 pc). Red contours in panels c and d show the 3 mm continuum emission. Black contours in the second row show ATLASGAL 870 µm continuum emission. Dashed black lines in panels b1 and d1 show the paths of the PV diagrams in Fig. 4. Ellipses in panel d represent the dendrogram structures identified in Sect. 3.3.