Integrated intensity (panels A and B) and velocity centroid (panels C and D) maps of the C¹⁸O and ¹³CO (2 →1) lines. The red ellipse marks the position of the hub-ring. Panels E–G: PV diagrams clockwise along the hub-ring (starting at the point A of the ellipse) for the ¹³CO (2 →1), C¹⁸O (2 →1) and C¹⁸O (1 →0) lines. Panels H and J: PV diagrams along the major axis (from point A to point C). Finally, panels K and M: PV diagrams along the minor axis (from point B to point D). The green dots in panels E–G indicate the velocities associated with the most intense emission along the ellipse, tracing the sinusoidal pattern. The yellow stars in panels H–J show the position of the cluster along the major axis. Finally, the cyan lines in panels K–M mark the strongest velocity gradients along the minor axis.