Results of the clustering algorithms for the Gaussian components of N₂H⁺ and HC₃N. The black circles in the bottom left corners represent the beam size of the respective data. The scale bar in the top left corner represents a length of 10 000 au. The semitransparent black lines show the spines of the fibers in NH₃ (Chen et al. 2020b). Left: cluster groups for N₂H⁺, labeled in red and blue and representing the more redshifted and blueshifted groups, respectively. Right: cluster groups for HC₃N, labeled 0 to 6.