Microturbulence as function of T_eff for the line 4934 Å. Left and centre panels shows quantities derived assuming 100 and 0% s-process contributions, respectively. A(Ba) = 1.15 ± 0.08 dex of the TO-1 star is assumed in both cases. Right panel shows quantities derived assuming the A(Ba) = 0.39 ± 0.08 dex and full r-process contribution of the TO-2 star. Black bars represent the microturbulence ranges required to fit observational lines with synthetic ones. Red dashes are the medians of the bars in the stages indicated on the top. The red and blue dotted lines are linear regressions of the red and blue dashes, respectively.