Plasma number density in the composition asymmetric setup (no shear) shown in the middle of the reconnection process (top left panel; Φ_rec ∼ 0.15Φ₀) and toward the saturation stage (bottom left panel; Φ_rec ∼ 0.45Φ₀) for σ_d = 0.1, β = 10⁻³, and σ_j = 5 (run SD01B0001). White contours represent magnetic field lines. We provide in the top and bottom right panels a plot of different quantities for the slice shown by the dashed green line on the density maps. The blue curve represents the x component of the magnetic field, and the red curve represents the plasma mass density, ρ (in logarithmic scale). The box midplane is represented by the dashed black lines. For the time evolution, see the online animation.