Contribution of each mode to the χ² values computed in Sect. 6.3. The symbols correspond to the splittings computed with the best-fit rotation profiles obtained using the RLS method with a smoothness condition on the whole profile (blue crosses), the RLS method with a smoothness condition in the radiative interior only and solid-body rotation in the convective envelope (red circles), or a two-zone model with an optimized depth of discontinuity (see Sect. 6.3.2, green diamonds).