(Modulus of the) 15.9th percentile velocity of LoSVD of the ionised gas as traced by the [OIII] (top panel) and Hα (middle panel) emission lines, and of the stars (bottom panel). For a Gaussian velocity distribution, the 15.9th percentile velocity corresponds to −1 standard deviation (−σ) from the mean velocity. Similarly to Fig. 14, we report for each plot the Spearman rank correlation coefficient ρ along with its associated two-sided p-value.