Variations in a Universal Density Profile
Cosmology and Nongalactic Astrophysics
2013-09-12 v1
Abstract
Using a newly-developed modeling technique, we present orbit-based dynamical models of the Carina, Draco, Fornax, Sculptor, and Sextans dwarf spheroidal (dSph) galaxies. These models calculate the dark matter profiles non-parametrically without requiring any assumptions to be made about their profile shapes. By lifting this restriction we discover a host of dark matter profiles in the dSphs that are different from the typical profiles suggested by both theorists and observers. However, when we scale these profiles appropriately and plot them on a common axis they appear to follow an approximate r^-1 power law with considerable scatter.
Keywords
Cite
@article{arxiv.1309.2637,
title = {Variations in a Universal Density Profile},
author = {John R. Jardel and Karl Gebhardt},
journal= {arXiv preprint arXiv:1309.2637},
year = {2013}
}
Comments
5 pages, 2 figures, accepted to ApJL