The cluster environments of the z~1 3CR radio galaxies

Details The cluster environments of the z~1 3CR radio galaxies The cluster environments of the z~1 3CR radio galaxies

2000-07-19

arxiv.org/abs/astro-ph/0007285v1

Mon.Not.Roy.Astron.Soc. 317 (2000) 720

Astronomy and Astrophysics

Astrophysics

18 pages LaTeX, including 10 figures. Accepted for publication in MNRAS

Scientific paper

10.1046/j.1365-8711.2000.03712.x

An analysis of the environments around a sample of 28 3CR radio galaxies with redshifts 0.6 < z < 1.8 is presented, based primarily upon K--band images down to K ~ 20 taken using the UK Infrared Telescope (UKIRT). A net overdensity of K-band galaxies is found in the fields of the radio galaxies, with the mean excess counts being comparable to that expected for clusters of Abell Class 0 richness. A sharp peak is found in the angular cross-correlation amplitude centred on the radio galaxies, which, for reasonable assumptions about the luminosity function of the galaxies, corresponds to a spatial cross-correlation amplitude between those determined for low redshift Abell Class 0 and Abell Class 1 clusters.

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