New axes for the fundamental plane
Astrophysics of Galaxies
2015-11-17 v2
Abstract
We argue that the stellar velocity dispersion observed in an elliptical galaxy is a good proxy for the halo velocity dispersion. As dark matter halos are almost completely characterized by a single scale parameter, the stellar velocity dispersion tells us the virial radius of the halo and the mass contained within. This permits non-dimensionalizing of the stellar mass and effective radius axes of the stellar mass fundamental plane by the virial radius and halo mass, respectively.
Cite
@article{arxiv.1508.02358,
title = {New axes for the fundamental plane},
author = {Paul L. Schechter},
journal= {arXiv preprint arXiv:1508.02358},
year = {2015}
}
Comments
4 pages. Contribution to IAU Symposium 317 "The General Assembly of Halos" edited by A. Bragaglia, M. Arnaboldi, M. Rejkuba & D. Romano. Four typos corrected