Figure 7From: A fast multipole method for stellar dynamics Acceleration errors for naive FMM. Similar to Figure 3, but for N= 10 7 particles and accelerations obtained by FMM using expansion order p=8 and multipole-acceptance criterion ρ z , A + ρ s , B <r θ crit (equation (5)) with θ crit =0.4. Bins are 0.01 dex wide.Back to article page