Light and Motion in the Local Volume
Astrophysics
2009-11-10 v1
Abstract
Using high-quality data on 149 galaxies within 10 megaparsecs (Mpc), I find no correlation between luminosity and peculiar velocity at all. There is no unequivocal sign on scales of 1-2 Mpc of the expected gravitational effect of the brightest galaxies, in particular infall toward groups; or of infall toward the Supergalactic Plane on any scale. Either dark matter is not distributed in the same way as luminous matter in this region, or peculiar velocities are not due to fluctuations in mass. The sensitivity of peculiar velocity studies to the background model is highlighted.
Keywords
Cite
@article{arxiv.astro-ph/0412090,
title = {Light and Motion in the Local Volume},
author = {Alan B. Whiting},
journal= {arXiv preprint arXiv:astro-ph/0412090},
year = {2009}
}
Comments
47 pages, 12 figures, several long tables. Accepted by the Astrophysical Journal