Downsizing Scaling Relations

Details Downsizing Scaling Relations Downsizing Scaling Relations

2005-09-27

arxiv.org/abs/astro-ph/0509792v1

Astronomy and Astrophysics

Astrophysics

2 pages, 2 figures, to appear in proceedings of the XXIst IAP Colloquium "Mass Profiles and Shapes of Cosmological Structures"

Scientific paper

10.1051/eas:20060101

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 ~4Gyr in all environments.

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