G.A. Mamon, F. Combes, C. Deffayet and B. Fort (eds)
EAS Publications Series, 20 (2006) 303-304
Downsizing Scaling Relations
Institut für Astrophysik, Friedrich-Hund-Platz 1, 37077 Göttingen, Germany
Faber–Jackson and Tully–Fisher scaling relations for elliptical and spiral galaxy samples up to z = 1 provide evidence for a differential behaviour of galaxy evolution with mass. In compliance with the downsizing scenario, the stellar populations of less massive galaxies display a stronger evolution than the more massive ones. For spirals, this may be attributed to a suppressed star formation efficiency in small dark matter halos. For ellipticals, star formation must have been negligible at least during the past ~4 Gyr in all environments.
© EAS, EDP Sciences, 2006