Energy Ranking Preservation in a N-Body Cosmological Simulation
arXiv:astro-ph/0604544 · doi:10.1111/j.1365-2966.2006.10479.x
Abstract
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.
arXiv comment8 pages, 3 figures, accepted for publication in the MNRAS
References in corpus (31)
- First Year Wilkinson Microwave Anisotropy Probe (WMAP) Observations: Determination of Cosmological Parameters
- A Universal Density Profile from Hierarchical Clustering
- Simulating the joint evolution of quasars, galaxies and their large-scale distribution
- The Inner Structure of LambdaCDM Halos III: Universality and Asymptotic Slopes
- Dynamical insight into dark-matter haloes
- On the origin of cold dark matter halo density profiles
- Chaos and Mixing in Triaxial Stellar Systems
- An estimate of Ω_m without priors
- Semi-analytical dark matter halos and the Jeans equation
- The distribution of pairwise peculiar velocities in the nonlinear regime
- Small Deviations from the R^1/4 Law, the Fundamental Plane, and Phase Densities of Elliptical Galaxies
- Dynamics of pairwise motions
- Inconsistency in theories of violent-relaxation
- A family of models of partially relaxed stellar systems II. Comparison with the products of collisionless collapse
- Relaxing and Virializing a Dark Matter Halo
- Galaxy Pairwise Velocity Distributions on Non-Linear Scales
- Transient chaos and resonant phase mixing in violent relaxation
- "Fundamental-Plane"-Like Relations From Collisionless Stellar Dynamics: A Comparison of Mergers and Collapses
- A numerical comparison of theories of violent relaxation
- A Note on the Statistical Mechanics of Violent Relaxation of Phase Space Elements of Different Densities
- Violent Relaxation, Phase Mixing, and Gravitational Landau Damping
- A family of models of partially relaxed stellar systems I. Dynamical properties
- Secondary Infall: Theory {\it Versus} Simulations
- Evolution of the Pairwise Peculiar Velocity Distribution Function in Lagrangian Perturbation Theory
- Nonlinear Gravitational Clustering: dreams of a paradigm
- The Pairwise Velocity Distribution Function of Galaxies in the LCRS, 2dF, and SDSS Redshift Surveys
- The Dynamical Evolution of Substructure
- A new test for the stable clustering hypothesis
- The approach to equilibrium in N-body gravitational systems
- Mean-pairwise peculiar velocity in cosmological N-body simulations: time-variation, scale-dependence and stable condition
- Gravitational Mesoscopic Constraints in Cosmological Dark Matter Halos