Regime diagram for dynamo simulations as a function of supercriticality and density stratification for two different aspect ratios: η = 0.2 (upper panel) and η = 0.6 (lower panel). Red circles correspond to dipolar dynamos, blue squares to multipolar dynamos, and black crosses are decaying dynamos. The size of the symbols depends on the value of the modified Elsasser number (Eq. (13)). The grey-shaded area highlights the dipolar region, while the dashed lines correspond to the critical Ro_ℓc values that mark the limit between dipolar and multipolar dynamos (see the vertical lines in Fig. 1).