Capture in 5:4 resonance in three different configurations. The first has Σ₀ = 400 g cm⁻² and viscosity corresponding to α = 0.001, the second Σ₀ = 500 g cm⁻² and constantkinematic viscosity ν = 10⁻⁵, and the third Σ₀ = 1000 g cm⁻² and ν = 10⁻⁵. The bottom curve shows capture in 6:5 resonance with Σ₀ = 400 g cm⁻² and viscosity equal to α = 0.001. In this last case, however, the planets start on close orbits, just exterior to the 4:3 MMR.