The sigma_c-V_c correlation in high and low surface brightness galaxies
Abstract
We investigate the relation between the central velocity dispersion, sigma_0, and the circular velocity, V_c, in galaxies. In addition to previously available data, we consider an observationally homogeneus sample of 52 high surface brightness and 11 low surface brightness spiral galaxies. We performed a straight line regression analysis in a linear scale, finding a good fit, also for low sigma_0 galaxies, always rejected in the previous studies. Low surface brightness galaxies seem to behave differently, showing either higher values of V_c or lower values of sigma_0 with respect to their high surface brightness counterparts.
Keywords
Cite
@article{arxiv.astro-ph/0311023,
title = {The sigma_c-V_c correlation in high and low surface brightness galaxies},
author = {A. Pizzella and E. Dalla Bonta' and E. M. Corsini and L. Coccato and F. Bertola},
journal= {arXiv preprint arXiv:astro-ph/0311023},
year = {2007}
}
Comments
2 pages, 2 figures, to appear in Proc. IAU Symp. 220, "Dark Matter in Galaxies" eds. S. Ryder, D.J. Pisano, M. Walker, & K. Freeman (San Francisco: ASP)