Galaxy clusters at 0.6-z-1.4 in the UKIDSS ultra deep survey early data release
/ Authors
C. V. Breukelen, L. Clewley, D. Bonfield, Steve Rawlings, M. Jarvis, J. Barr, S. Foucaud, O. Almaini, M. Cirasuolo, G. Dalton
and 9 more authors
J. Dunlop, A. Edge, P. Hirst, R. McLure, M. Page, K. Sekiguchi, Chris Simpson, I. Smail, M. Watson
/ Abstract
We present the first cluster catalogue extracted from the UKIRT Infrared Deep Sky Survey Early Data Release. The catalogue is created using UKIDSS Ultra Deep Survey infrared J and K data combined with 3.6 µm and 4.5 µm Spitzer bands and optical BV Rizimaging from the Subaru Telescope over 0.5 square degrees in the Subaru XMM-Newton Deep Field. We have created a new cluster-detection algorithm, based on the Friends-Of-Friends and Voronoi Tessellation methods, which utilises probability distribution functions derived from a photometric redshift analysis. We employ mock catalogues to understand the selection effects and contamination associated with the algorithm. The cluster catalogue contains 13 clusters at redshifts 0.61 6 z 6 1.39 with luminosities 10L ∗ � Ltot � 50L ∗ , corresponding to masses 5 × 10 13 M⊙ � Mcluster � 3 × 10 14 M⊙ for M/M ⊙ L/L⊙ = 75h. The measured sky surface density of � 10 deg −2 for high-redshift (z = 0.5 1.5), massive (> 10 14 M⊙) clusters is precisely in line with theoretical predictions presented by Kneissl et al. (2001).
Journal: Monthly Notices of the Royal Astronomical Society: Letters