Figure 10

The fraction of accurate Hermite simulations as a function of Hermite time-step parameter η . The different curves represent the different data sets: equal mass Plummer (black bullets), Plummer with different masses (red triangles), equal mass cold Plummer (blue squares) and cold Plummer with different masses (green stars). As η decreases, the accurate fraction increases. However, for \(\eta< 2^{-7}\), the fraction starts to saturate, more so for the cold data sets. At this point the effect of round-off error becomes important.