EAS Publications Series
Volume 20, 2006Mass Profiles and Shapes of Cosmological Structures
|Page(s)||5 - 10|
|Published online||19 May 2006|
G.A. Mamon, F. Combes, C. Deffayet and B. Fort (eds)
EAS Publications Series, 20 (2006) 5-10
Understanding the Equilibrium Structure of CDM Halos
Department of Astronomy,
1 University Station, C1400, Austin, TX 78712, USA
2 Canadian Institute for Theoretical Astrophysics, University of Toronto, 60 St. George Street, Toronto, ON M5S 3H8, Canada
3 Département de Physique, de Génie Physique et d'Optique, Université Laval, Québec, QC G1K 7P4, Canada
N-body simulations find a universal structure for the halos which result from the nonlinear growth of Gaussian-random-noise density fluctuations in the CDM universe. This talk summarized our attempts to derive and explain this universal structure by analytical approximation and simplified models. As an example, we show here that a 1D spherical infall model involving a fluid approximation derived from the Boltzmann equation can explain not only the halo density profile but its phase-space density profile, as well.
© EAS, EDP Sciences, 2006
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