| Issue |
EAS Publications Series
Volume 20, 2006
Mass Profiles and Shapes of Cosmological Structures
|
|
|---|---|---|
| Page(s) | 131 - 134 | |
| DOI | https://doi.org/10.1051/eas:2006059 | |
| Published online | 19 May 2006 | |
Mass Profiles and Shapes of Cosmological Structures
G.A. Mamon, F. Combes, C. Deffayet and B. Fort (eds)
EAS Publications Series, 20 (2006) 131-134
G.A. Mamon, F. Combes, C. Deffayet and B. Fort (eds)
EAS Publications Series, 20 (2006) 131-134
Mass-to-light ratios of ellipticals in ΛCDM
1
INAF-Observatory of Capodimonte, Naples, Italy
2
Planetary Nebula Spectrograph team: see
http://www.astro.rug.nl/~pns/pns_team.html#coll
We use the mass-to-light gradients in early-type galaxies to infer the global dark matter fraction, fd = Md/M*, for these systems. We discuss implications about the total star formation efficiency in dark-matter halos and show that the the trend of fd with mass produces virial mass-to-light ratios which are consistent 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.
© EAS, EDP Sciences, 2006