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research article
Universal Properties of Dark Matter Halos
We discuss the universal relation between density and size of observed dark matter halos that was recently shown to hold on a wide range of scales, from dwarf galaxies to galaxy clusters. Predictions of cold dark matter (Lambda CDM) N-body simulations are consistent with this relation. We demonstrate that this property of Lambda CDM can be understood analytically in the secondary infall model. Qualitative understanding given by this model provides a new way to predict which deviations from Lambda CDM or large-scale modifications of gravity can affect universal behavior and, therefore, to constrain them observationally.
Type
research article
Web of Science ID
WOS:000277699600012
Authors
Publication date
2010
Published in
Volume
104
Article Number
191301
Peer reviewed
REVIEWED
EPFL units
Available on Infoscience
December 16, 2011
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