Understanding the Equilibrium Structure of CDM Halos

Details Understanding the Equilibrium Structure of CDM Halos Understanding the Equilibrium Structure of CDM Halos

2005-10-05

arxiv.org/abs/astro-ph/0510146v1

Astronomy and Astrophysics

Astrophysics

To appear in the proceedings of 21st IAP colloquium, "Mass Profiles and Shapes of Comological Structures"

Scientific paper

10.1051/eas:2006036

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.

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