Illustration of the α-and the ω-dynamo mechanisms acting in the simulation. Top row: field lines rising, rotating in opposite directions above and below the disk, and reconnecting to create poloidal field from the toroidal component (α-dynamo). Bottom row: field lines winding up by differential rotation to create toroidal field from the poloidal (ω-dynamo). The box size in this illustration is 24 kpc.