Scaling relations of the colour-detected cluster RzCS 052 at z=1.016 and of some other high redshift clusters

Abstract

We report on the discovery of the z=1.016 cluster RzCS 052 using a modified red sequence method, followup spectroscopy and X-ray imaging. This cluster has a velocity dispersion of 710+-150 km/s, a virial mass of 4.0e14 Msol (based on 21 spectroscopically confirmed members) and an X-ray luminosity of (0.68+- 0.47)e44 ergs/s in the [1-4] keV band. This optically selected cluster appears to be of richness class 3 and to follow the known L_X-sigma_v relation for high redshift X-ray selected clusters. Using these data, we find that the halo occupation number for this cluster is only marginally consistent with what expected assuming a self-similar evolution of cluster scaling relations, suggesting perhaps a break of them at z~1. We also rule out a strong galaxy merging activity between z=1 and today. Finally, we present a Bayesian approach to measuring cluster velocity dispersions and X-ray luminosities in the presence of a background: we critically reanalyze recent claims for X-ray underluminous clusters using these techniques and find that the clusters can be accommodated within the existing L_X -sigma_v relation.

MNRAS, in press

References in corpus (12)

• A kinematical approach to dark energy studies
• On the efficiency and reliability of cluster mass estimates based on member galaxies
• RASS-SDSS Galaxy Cluster Survey. V. The X-ray-Underluminous Abell Clusters
• The Build-up of the Red Sequence in the galaxy cluster MS1054-0321 at z=0.831
• XMM-LSS discovery of a z=1.22 galaxy cluster
• The XMM-LSS Survey: A well controlled X-ray cluster sample over the D1 CFHTLS area
• The Virial Mass Function of Nearby SDSS Galaxy Clusters
• Near-Infrared Properties of Moderate-Redshift Galaxy Clusters: Halo Occupation Number, Mass-to-Light Ratios and Omega_m
• The buildup of stellar mass and the 3.6 micron luminosity function in clusters from z=1.25 to z=0.2
• The X-ray properties of optically-selected z>0.6 clusters in the ESO Distant Cluster Survey
• AEGIS: Chandra Observation of DEEP2 Galaxy Groups and Clusters
• A possible dearth of hot gas in galaxy groups at intermediate redshift

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• Variegate galaxy cluster gas content: Mean fraction, scatter, selection effects and covariance with X-ray luminosity
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