Abstract
We present the results of a search for galaxy clusters in the Subaru-XMM
Deep Field (SXDF). We reach a depth for a total cluster flux in the
0.5-2 keV band of 2 × 10-15 erg cm-2
s-1 over one of the widest XMM-Newton contiguous raster
surveys, covering an area of 1.3deg2. Cluster candidates are
identified through a wavelet detection of extended X-ray emission. The
red-sequence technique allows us to identify 57 cluster candidates. We
report on the progress with the cluster spectroscopic follow-up and
derive their properties based on the X-ray luminosity and cluster
scaling relations. In addition, three sources are identified as X-ray
counterparts of radio lobes, and in three further sources, an X-ray
counterpart of the radio lobes provides a significant fraction of the
total flux of the source. In the area covered by near-infrared data, our
identification success rate achieves 86 per cent. We detect a number of
radio galaxies within our groups, and for a luminosity-limited sample of
radio galaxies we compute halo occupation statistics using a marked
cluster mass function. We compare the cluster detection statistics in
the SXDF with that in the literature and provide the modelling using the
concordance cosmology combined with current knowledge of the X-ray
cluster properties. The joint cluster log(N) - log(S) is overpredicted
by the model, and an agreement can be achieved through a reduction of
the concordance σ8 value by 5 per cent. Having
considered the dn/dz and the X-ray luminosity function of clusters, we
conclude that to pin down the origin of disagreement a much wider
(50deg2) survey is needed.
Original language | English |
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Pages (from-to) | 2063-2076 |
Journal | Monthly Notices of the Royal Astronomical Society |
Volume | 403 |
DOIs | |
Publication status | Published - 1 Apr 2010 |