Influence on the ξ_min microturbulence broadening term in the spectral synthesis for the Hζ line. In red the 1D fit with v_turb > 0, in dash-dotted green the model with v_turb = 0 and a lower log ɡ with standard ξ = 10 km s⁻¹, in blue the models with v_turb = 0 and a lower log ɡ changing the ξ_min with 0, 20 and 50 km s⁻¹. The influence of ξ_min does not explain the effect on the v_turb > 0 for the depth of the lines.