The assembly of massive galaxies from NIR observations of the Hubble Deep Field South
Preprint
- 17 July 2003
Abstract
We use a deep K(AB)2, the fraction of passively fading galaxies is at most 25%, although they can contribute up to about 40% of the stellar mass density. On the other hand, star--forming galaxies at z>2 form stars with an average specific rate at least <\dot M/M_*> ~4 x10^{-10} yr$^{-1}$, 3 times higher than the z<~1 value. This implies that UV bright star--forming galaxies are substancial contributors to the rise of the stellar mass density with cosmic time. Although these results are globally consistent with $\Lambda$--CDM scenarios, the present rendition of semi analytic models fails to match the stellar mass density produced by more massive galaxies present at z>2.Keywords
All Related Versions
- Version 1, 2003-07-17, ArXiv
- Published version: The Astrophysical Journal, 594 (1), L9.
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