Astronomy and Astrophysics – Astrophysics
Scientific paper
2006-04-26
Mon.Not.Roy.Astron.Soc.370:420-426,2006
Astronomy and Astrophysics
Astrophysics
8 pages, 3 figures, accepted for publication in the MNRAS
Scientific paper
10.1111/j.1365-2966.2006.10479.x
In this paper we present a study of the cosmic flow from the point of view of how clusterings at different dynamical regimes in an expanding universe evolve according to a `coarse-grained' partitioning of their ranked energy distribution. By analysing a Lambda-CDM cosmological simulation from the Virgo Project, we find that cosmic flows evolve in an orderly sense, when tracked from their coarse-grained energy cells, even when nonlinearities are already developed. We show that it is possible to characterize scaling laws for the Pairwise Velocity Distribution in terms of the energy cells, generally valid at the linear and nonlinear clustering regimes.
Dantas Christine C.
Ramos Fernando M.
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