Correlations between physical parameters of NH₃ fragments. Panels a and b plot nonthermal velocity dispersions including or excluding the bulk motions versus kinetic temperature. The red and gray lines show the fitted result of the linear regression and the thermal velocity dispersion. There are positive correlations in both of them. Panels c and d plot nonthermal velocity dispersions including or excluding the bulk motions versus deconvolved radius. The gray line shows Larson’s law.