Bias effect of the disk velocity on Hα modeling. One VEGA measurement and observed Hα profile (BeSOS, as in Fig. 12) are shown in black lines. Our best-fit kinematic (dashed red) and HDUST (dashed blue) models are shown in Hα visibility and line profile. They are compared to HDUST models with a higher mass of 10.8 M_⊙ with: Σ₀ = 0.12 g cm⁻² (dashed orchid) and Σ₀ = 0.28 g cm⁻² (dashed green). See text for discussion.