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Simulations, Data Analysis and Algorithms

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Figure 9 | Computational Astrophysics and Cosmology

Figure 9

From: On the reliability of N-body simulations

Figure 9

Direct comparison of Brutus and Hermite results per individual simulation. The results are shown only for the \(N=3\) equal mass Plummer data set and for a Hermite time-step parameter \(\eta=2^{-5}\). Each dot in a panel represents a different initial realisation. The value on the ordinate is the value obtained using Hermite and the value on the abscissa the value obtained by Brutus. We compare the escaper velocity (top left), direction of the escaper: polar angle (top middle) and azimuthal angle (top right) (with respect to the plane of the binary and pericentre direction), dissolution time (bottom left), binary semimajor axis (bottom middle) and binary eccentricity (bottom right). The diagonal represents accurate Hermite solutions. The scatter around it represents solutions where Hermite and Brutus have diverged.

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