Mass-to-light ratios of ellipticals in LCDM
Abstract
We use the mass-to-light gradients in early-type galaxies to infer the global dark matter fraction, f_d=M_d/M_*, for these systems. We discuss implications about the total star formation efficiency in dark-matter halos and show that the trend of with mass produces virial mass-to-light ratios which are consistent with semi-analitical models. Preliminary kurtosis analysis of the quasi-constant M/L galaxies in Romanowsky et al. seems at odd with Dekel et al. simulations.
Keywords
Cite
@article{arxiv.astro-ph/0510568,
title = {Mass-to-light ratios of ellipticals in LCDM},
author = {N. R. Napolitano and the PN. S team},
journal= {arXiv preprint arXiv:astro-ph/0510568},
year = {2009}
}
Comments
5 pages, 4 figures. To appear in Proceedings of XXIst IAP Colloquium, "Mass Profiles & Shapes of Cosmological Structures" (Paris, 4-9 July 2005), eds G. A. Mamon, F. Combes, C. Deffayet, B. Fort (Paris: EDP Sciences). Figure enlarged with respect the proceeding format, minor changes. Collaboration website at http://www.astro.rug.nl/~pns/pns_team.html