Document Mass Profiles and Shapes of Cosmological Structures
G.A. Mamon, F. Combes, C. Deffayet and B. Fort (eds)
EAS Publications Series, 20 (2006) 5-10
DOI: 10.1051/eas:2006036
Understanding the Equilibrium Structure of CDM Halos
P.R. Shapiro1, K. Ahn1, M. Alvarez1, I.T. Iliev2 and H. Martel31 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
Abstract
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