Velocity-coherent skeletons (left) and spines (right) identified using the automated tool CRISPY applied to the C¹⁸O(1–0) datacube. A skeleton is defined as a ridge that has been gridded onto an image and a spine as a skeleton with all its branches removed. The greyscale image in each panel corresponds to the intensity map of C¹⁸O(1–0) integrated over −11 to −4 km s⁻¹ with S/N ratio >5. The continuously changing velocity centroids along the filaments are marked in different colours and the values are mentioned in the left panels. The triangle and +’ mark the positions of the 70 μm and 160 μm continuum sources, respectively.