Simulating the Complexity of the Dark Matter Sheet I: Numerical Algorithms

21 May 2020 Stücker Jens Hahn Oliver Angulo Raul E. White Simon D. M.

At early times dark matter has a thermal velocity dispersion of unknown amplitude which, for warm dark matter models, can influence the formation of nonlinear structure on observable scales. We propose a new scheme to simulate cosmologies with a small-scale suppression of perturbations that combines two previous methods in a way that avoids the numerical artefacts which have so far prevented either from producing fully reliable results... (read more)

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