Generation of an asymmetric double-peak profile with B = 0 and atomic orientation (w₁ = 5%) following Eq. (9). The quantities represented in the vertical axis are labeled inside the figure but only their shapes are important here. The green curve is normalized to one, and the black curves are multiplied by the same constant, in order to plot everything together. The factors ϵ_V and η_V were calculated for the Na I D₂ line in a multilevel atom with HFS.