Ratio between core and envelope rotation rates obtained with GENEC and the formalism of Fuller et al. (2019) with α = 0.6 (blue line). The filled blue circle corresponds to the observed core-envelope contrasts for KIC 5955122. For visual comparison, the stars of D14 have been added to this plot (gray symbols). However, we note that evaluating the transport efficiency for these stars requires a dedicated modeling taking into account their masses and chemical compositions (see Fig. 3 of Eggenberger et al. 2019a).