Column density Σ over radius r for prograde infall without an inclination angle in run 1 (green colors) and retrograde infall without an inclination angle in run 2 (orange colors) at t = 50 kyr (dashed lines), t = 100 kyr (dotted lines), and t = 150 kyr (solid lines).The darkness of the line colors indicates the evolution in time from 50 kyr (lightest color) to the final time (darkest color) at t = 150 kyr. The black dashed line corresponds to a theoretical column density profile for Σ₀ = 170 g cm⁻² and p = 1.5 which extends to 2000 AU.