Distribution Functions of Dark Matter Halos
ORAL
Abstract
The spherical NFW profile provides a good approximation to the density distributions of dark matter halos. In dynamical equilibrium, this density profile should correspond to a stationary distribution function of dark matter in phase space. We derive this distribution function and show that it is a good match to those obtained from N-body simulations. Additionally, we demonstrate a simple scaling relationship between R(E), the inversion of the potential energy, and the distribution function, and we show how this scaling can be used to well approximate the distribution function.
*This work was supported in part by the US Department of Energy under grant DE-FG02-87ER40328.
–
Publication: The research presented presented here is being prepared for a pair of papers, to be submitted in the next few weeks.
Presenters
-
Axel Gross
- University of Minnesota