Top: asymmetry measure of the velocity v_asym and velocity dispersion σ_asym fields for the whole sample observed at low-z when applying the unweighted (left) or the weighted (right) methods. Different colors distinguish the different morphological types: the solid dark blue dots are the morphologically classified isolated disks, the wide pairs are in open blue dots, the post-coalescence mergers are in solid dark green dots, and the close-pairs are in open green dots. Middle: probability distribution functions (PDFs) of the respective planes normalized to the number of objects in each bin. Bottom: distribution of the total number of well classified galaxies at low-z as a function of the total kinematic asymmetry K_tot in the unweighted (left) and weighted (right) planes. In all the panels we represent the following lines: the red dashed line(s) represents the “optimal” frontier, which gives us the K_tot value for which the maximum index I is derived; the solid black line indicates the value derived according to Eq. (5) , while the two dashed black lines represent the statistical frontiers ( MAD).