The evolution of the cluster environments of radio sources at z 1.8

P Best, M Lehnert, H Rottgering, G Miley

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Abstract

An analysis of the cluster environments around distant radio galaxies is presented, in particular the results from new NTT deep optical-IR imaging of the fields of radio sources at z similar to 1.6. A net overdensity of K-band galaxies is found, together with a sharp peak in the angular cross-correlation amplitude, centred on the radio galaxies. This excess clustering is associated predominantly with red galaxies, with colours consistent with being old ellipticals at the radio source redshift. A large excess of such red galaxies is seen, particularly within 100 kpc of the radio source. These comprise amongst the most distant red sequences of cluster ellipticals yet discovered, that is, the highest redshift 'normal' clusters.

Original languageEnglish
Title of host publicationTRACING COSMIC EVOLUTION WITH GALAXY CLUSTERS, PROCEEDINGS
EditorsS Borgani, M Mezzetti, R Valdarnini
Place of PublicationSAN FRANCISCO
PublisherASTRONOMICAL SOC PACIFIC
Pages19-22
Number of pages4
ISBN (Print)1-58381-108-7
Publication statusPublished - 2002
EventWorkshop on Tracing Cosmic Evolution with Galaxy Clusters - SESTO PUSTERIA
Duration: 3 Jul 20016 Jul 2001

Conference

ConferenceWorkshop on Tracing Cosmic Evolution with Galaxy Clusters
CitySESTO PUSTERIA
Period3/07/016/07/01

Keywords

  • GALAXIES

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