Effect of small scale density perturbations on the formation of dark matter halo profiles

Abstract

With help of a set of toy N-body models of dark halo formation we study the impact of small scale initial perturbations on the inner density profiles of haloes. We find a significant flattening of the inner slope $\alpha =\frac{d\log \rho }{d\log r}$ to $\alpha =-0.5$ in some range of scales and amplitudes of the perturbations (while in the case of absence of these perturbations the NFW profile with $\alpha =-1$ is reproduced). This effect may be responsible for the formation of cuspless galactic haloes.

5 pages, 2 figures, accepted for publication in MNRAS Letters

References in corpus (5)

• The Core-Cusp Problem
• A Universal Mass Profile for Dwarf Spheroidal Galaxies?
• HI holes and high-velocity clouds in the spiral galaxy NGC 6946
• Dark Matter Halo Profiles in Scale-Free Cosmologies
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Cited by in corpus (3)

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