Astronomy and Astrophysics – Astrophysics
Scientific paper
1998-06-04
Astronomy and Astrophysics
Astrophysics
54 pages, Latex, 25 figures, to appear in "The Astrophysical Journal" October 20, 1998, Vol. 506 #2
Scientific paper
10.1086/306287
We have investigated the properties of a complete K-band selected sample of 35 elliptical and S0 galaxies brighter than K=20.15 in the Hubble Deep Field, as representative of the field galaxy population. This sample has been derived from deep K-band image by the KPNO-IRIM camera, by applying a rigorous morphological classification scheme based on quantitative analyses of the surface brightness profiles. The broad-band spectra of the sample galaxies allow us to date their dominant stellar populations. The majority of bright early-types in this field are found at redshifts z<1.3 to display colors indicative of a fairly wide range of ages (typically 1.5 to 3 Gyrs). We find that the major episodes of star-formation building up typical M_star galaxies have taken place during a wide redshift interval 1
Arnouts Stephane
Bressan Alberto
Danese Lugi
Fasano Giancarmine
Franceschini Alberto
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