NOAO >   Observing Info >   Approved Programs >   2009A-0149

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Proposal Information for 2009A-0149


PI: John Stott, Liverpool John Moores University, jps@astro.livjm.ac.uk
Address: Astrophysics Research Institute , Liverpool John Moores University , Twelve Quays House , Egerton Wharf, Birkenhead, CH41 1LD, UK, United Kingdom

CoI: Chris Collins, Liverpool John Moores University
CoI: Adam Stanford, Lawrence Livermore National Laboratory
CoI: Alastair Edge, University of Durham
CoI: Matt Hilton, University of KwaZulu-Natal
CoI: Kathy Romer, University of Sussex
CoI: Mark Swinbank, University of Durham
CoI: Chris Miller, Cerro Tololo Interamerican Observatory
CoI: Bob Mann, Royal Observatory Edinburgh and ATC
CoI: Ed Lloyd-Davies, University of Sussex
CoI: Bob Nichol, University of Portsmouth
CoI: Andrew Liddle, University of Sussex

Title: The XCS/DXS search for the highest redshift galaxy clusters

Abstract: We select the highest redshift galaxy clusters by combining X-ray and near-infrared observations from the XMM Cluster Survey and UKIDSS Deep eXtragalactic Survey respectively (DXS). Having access to both of these rich datasets provides us with a unique opportunity to select galaxy clusters in the redshift range 1<z<2. This proposal builds on our recent successful follow-up of UKIDSS near-infrared selected and XCS X-ray selected clusters. The former yielding 11 0.8<z<1.3 clusters including the discovery of a massive supercluster at z=0.9 while the latter discovered the most distant X-ray cluster (XMMXCSJ2215, z=1.46). By combining our near-infrared and X-ray selection we will discover the highest redshift galaxy clusters yet known, significantly increasing the number of clusters above z=1 and pushing out beyond z=1.5. This will provide ourselves and others with the tools to test hierarchical build up of the most massive structures in the Universe and the evolution of their component galaxies.


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