Where Does Dark Matter Become Important in Elliptical Galaxies?
Astrophysics
2007-05-23 v1
Abstract
Recent results from gravitational lensing are combined with new modeling of the stellar velocity distributions in nearby galaxies to probe the connection between the luminous and the dark matter in elliptical galaxies. From analysing a small number of luminous ellipticals the following picture appears to emerge: (1) the best fitting total mass distribution (luminous and dark) leads to a flat rotation curve (v2=RdPhi/dR) from 0.3 to >= 3 effective radii; (2) half the total mass inside the effective radius (~3kpc) may already be dark, and (3) ellipticals reside in much denser halos than spiral galaxies of the same stellar mass.
Cite
@article{arxiv.astro-ph/9611040,
title = {Where Does Dark Matter Become Important in Elliptical Galaxies?},
author = {H. -W. Rix},
journal= {arXiv preprint arXiv:astro-ph/9611040},
year = {2007}
}
Comments
Postscript file (6 pages including 3 figures). Contribution to the DM1996 Workshop, Sesto, Italy