The fractal distribution of haloes

Details The fractal distribution of haloes The fractal distribution of haloes

2005-05-30

arxiv.org/abs/astro-ph/0505607v1

Europhys.Lett.71:332,2005

Astronomy and Astrophysics

Astrophysics

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

Scientific paper

10.1209/epl/i2005-10082-6

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.

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