First row: time evolution of the radial vertical dispersion profiles, σz(r), for the gSb, gSa, and gS0 models. Different colors and line styles correspond to the times indicated in the first row, rightmost panel. The bars’ corotation (CR) and outer 2:1 Lindblad resonance (OLR) are shown by the dotted and solid vertical lines, respectively, with colors corresponding to the different times. Second row: same but for the radial velocity dispersion, σr(r). Third row: same but for the ratio σz/σr. The slope in σz/σr outside the bar shows that the radial profile flattens more with time than the vertical one, while its overall decrease means that the disc heats more radially than vertically.
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