Left: total magnetic energy (normalized to the initial value) vs. time for simulations with B _p = B _6.5 and different values of resistivity: η ₀/ M _☉ = 0.02 (dashed red), 0.06 (long-dashed purple), 0.10 (blue), and 0.14 (black). In the insert, we have also η ₀/ M _☉ = 0.12 (dotted black). Right: ratio of toroidal and poloidal magnetic energies vs. time for the same collection of simulations.