The fractal distribution of haloes

Abstract

We examine the proposal that a model of the large-scale matter distribution consisting of randomly placed haloes with power-law profile, as opposed to a fractal model, can account for the observed power-law galaxy-galaxy correlations. We conclude that such model, which can actually be considered as a degenerate multifractal model, is not realistic but suggests a new picture of multifractal models, namely, as sets of fractal distributions of haloes. We analyse, according to this picture, the properties of the matter distribution produced in cosmological N-body simulations, with affirmative results; namely, haloes of similar mass have a fractal distribution with a given dimension, which grows as the mass diminishes.

arXiv comment7 pages, 1 figure (3 EPS files), accepted in Europhysics Letters

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• Halo Models of Large Scale Structure
• An analytic model for the spatial clustering of dark matter haloes
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• Generalized statistical models of voids and hierarchical structure in cosmology
• Scaling Laws in the Cosmic Structure and Renormalization Group
• Smooth halos in the cosmic web
• Scale Symmetry in the Universe
• Halo Models of Large Scale Structure and Reliability of Cosmological N-Body Simulations