The Orbital Structure of Dark Matter Halos with Gas
Astrophysics
2009-10-31 v1
Abstract
With the success of the Chandra and XMM missions and the maturation of gravitational lensing techniques, powerful constraints on the orbital structure of cluster dark matter halos are possible. I show that the X-ray emissivity and mass of a galaxy cluster uniquely specify the anisotropy and velocity dispersion profiles of its dark matter halo. I consider hydrostatic as well as cooling flow scenarios, and apply the formalism to the lensing cluster CL0024+16 and the cooling flow cluster Abell 2199. In both cases, the model predicts a parameter-free velocity dispersion profile that is consistent with independent optical redshift surveys of the clusters.
Keywords
Cite
@article{arxiv.astro-ph/0008157,
title = {The Orbital Structure of Dark Matter Halos with Gas},
author = {Andisheh Mahdavi},
journal= {arXiv preprint arXiv:astro-ph/0008157},
year = {2009}
}
Comments
17 pages, 12 figures; to appear in the Astrophysical Journal