[43.05] Density Profiles of Dark Matter Halos

AAS 201st Meeting, January, 2003
Session 43. Forming and Probing Large Scale Structure
Poster, Tuesday, January 7, 2003, 9:20am-6:30pm, Exhibit Hall AB

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[43.05] Density Profiles of Dark Matter Halos

D. Reed (Univ. of Washington), L. Verde (Princeton), J. Stadel (Univ. of Zurich, Switzerland), T. Quinn, F. Governato (Univ. of Washington)

We analyze substructure of dark matter halos using high resolution LCDM cosmological simulations at unprecedented resolution. Two of our simulated halos have almost 10⁷ particles within the virial radius and a spatial resolution of 0.001 Rvir. Our halo sample includes a dozen clusters, two groups, and one Milky Way. In general, density profiles of dark matter halos are steeper than the Navarro, Frenk, & White (NFW) profile, with a scatter that ranges rougly from the NFW value of -1 to the Moore et al. value of -1.5. We show that the inner part of the density profile of each individual halo is rather stable over time and that its slope has been set at high redshift.

This work has been supported by a NASA Graduate Student Research Program Fellowship.

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