Fig. 2: Generation of mean electromagnetic field.
From: A large-scale magnetic field produced by a solar-like dynamo in binary neutron star mergers

Mean and total electromagnetic energy in the region where the magnetorotational instability is active with ρ ≤ 1014.5 g cm−3 as a function of the post-merger time. The blue, green, cyan and purple curves denote the mean poloidal, mean toroidal, total poloidal and total toroidal components, respectively, in the high-resolution simulation. The dashed curves are for the simulation with Δxfinest = 200 m.