CDM in LSB Galaxies: Toward the Optimal Halo Profile
Astrophysics
2007-05-23 v1
Abstract
Low Surface Brightness (LSB) galaxies are dominated by dark matter. High-resolution rotation curves suggest that their total mass-density distributions are dominated by constant density cores rather than the steep and cuspy distributions found in Cold Dark Matter (CDM) simulations. The data are best described by a model with a soft core with an inner power-law mass-density slope alpha = 0.2 +/- 0.2. However no single universal halo profile provides an adequate description of the data. The observed mass profiles appear to be inconsistent with LambdaCDM.
Cite
@article{arxiv.astro-ph/0311117,
title = {CDM in LSB Galaxies: Toward the Optimal Halo Profile},
author = {W. J. G. de Blok},
journal= {arXiv preprint arXiv:astro-ph/0311117},
year = {2007}
}
Comments
Proceedings IAU 220 "Dark Matter in Galaxies", Eds. S. Ryder et al