Mass-period (surface) distribution of some models randomly chosen in the grids described in Sect. 5.3. The criterion considered for the stability of the dipole is the ratio Ro_sh, Hp/Ro_conv, mid with the threshold expressed in Eq. (7). Circles and stars are respectively PMS and MS models. Red (resp. green) markers are models that lost (resp. kept) their dipole between their formation and their present age. Each panel corresponds to a grid with a given additional turbulent viscosity, ν_add.