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2003MNRAS.341L..55T - Mon. Not. R. Astron. Soc., 341, L55-L58 (2003/June-1)
Discovery of an overdensity of faint red galaxies in the vicinity of the z=1.786 radio galaxy 3C294.
TOFT S., PEDERSEN K., EBELING H. and HJORTH J.
Abstract (from CDS):
We report the discovery of an overdensity of faint red galaxies in the vicinity of the z=1.786 radio galaxy 3C294. The overdensity, discovered in a 84-min Ks -band ISAAC/VLT image is significant at the 2.4σ level (compared to the local field density), and overlaps with the extended X-ray emission around 3C294 detected with the Chandra X-ray Observatory. The near-infrared colours of the galaxies making up the overdensity show a large scatter and the galaxies do not follow a red sequence in the colour magnitude diagram. If the galaxies are in a cluster at z=1.786 they must be dominated by young stellar populations with different star-formation histories.
Abstract Copyright: 2003 RAS
Journal keyword(s): galaxies: clusters: individual: 3C294 - galaxies: evolution - galaxies: formation - galaxies: high-redshift - cosmology: observations - X-rays: galaxies: clusters
Nomenclature: Table 1, Fig.1: [TPE2003] XN (Nos X1-X3).
Simbad objects: 4
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