Output of the unsupervised GMM clustering algorithm on the [C II] data of RCW 79. Top: Cluster locations in RCW 79, representing zones with similar [C II] spectral line profiles, identified with the GMM. The contours indicate the total [C II] integrated intensity, starting at 25 K km s⁻¹ with increments of 25 K km s⁻¹, revealing that the regions identified based on the normalized [C II] spectral morphology with the GMM are clearly correlated to spatial features identified in the intensity map of the region. Bottom: Corresponding average spectra for each cluster identified by the GMM calculations on RCW 79.