Good and Proper: Self-similarity of N-body Simulations with Proper Force Softening
Lehman H. Garrison; Michael Joyce; Daniel J. Eisenstein · 2021 · arXiv
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Abstract (excerpt)
Analysis of self-similarity in scale-free $N$-body simulations reveals the spatial and temporal scales for which statistics measured in cosmological simulations are converged to the physical continuum limit. We examine how the range of scales in which the two-point correlation function is converged depends on the force softening length and whether it is held constant in comoving or proper coordinates. We find that a proper softening that reaches roughly 1/30th of the inter-particle spacing by the end of the simulation resolves the same spatial and temporal scales as a comoving softening of the
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Metadata source: arXiv