Results for the 2D Sedov test at t = 0.1 taking X_a = P^k, where P is the pressure and k = 0.05 (black dashed line) compared to models S₁ (red) and S₂ (green). We show here the radial profiles of the density (left panel) and the equipartition condition (right panel). Solid black line is the analytic solution for the density profile. We note on the left panel that there is a small precursor bump in density for the calculation with X_a = P^k which, for models S₁ and S₂, is absent.