Sunyaev Zel'dovich observations of a statistically complete sample of galaxy clusters with OCRA-p

Abstract

We present 30 GHz Sunyaev Zel'dovich observations of a statistically complete sample of galaxy clusters with OCRA-p. The clusters are the 18 most X-ray luminous clusters at z > 0.2 in the ROSAT Brightest Cluster Sample. We correct for contaminant radio sources via supplementary observations with the Green Bank Telescope, also at 30 GHz, and remove a cluster that is contaminated by an unresolved X-ray source. All 17 remaining clusters have central SZ effects with Comptonisation parameter y_0 exceeding 1.9x10^-4, and 13 are detected at significance > 3 sigma. We use our data to examine scalings between y_0 and X-ray temperature, X-ray luminosity, and the X-ray mass proxy Y_X, and find good agreement with predictions from self-similar models of cluster formation, with an intrinsic scatter in y_0 of about 25%. We also comment on the success of the observations in the face of the contaminant source population, and the implications for upcoming cm-wave surveys.

14 pages, 2 figures, accepted by MNRAS

References in corpus (10)

• Galaxy clusters discovered with a Sunyaev-Zel'dovich effect survey
• Images, structural properties and metal abundances of galaxy clusters observed with Chandra ACIS-I at 0.1<z<1.3
• X-ray and Sunyaev-Zel'dovich Effect Measurements of the Gas Mass Fraction in Galaxy Clusters
• The Lx-Yx Relation: Using Galaxy Cluster X-Ray Luminosity as a Robust, Low Scatter Mass Proxy
• The Wilkinson Microwave Anisotropy Probe (WMAP) Source Catalog
• X-ray and Sunyaev-Zel'dovich scaling relations in galaxy clusters
• Radio Sources Toward Galaxy Clusters at 30 GHz
• 30 GHz flux density measurements of the Caltech-Jodrell flat-spectrum sources with OCRA-p
• Preliminary Sunyaev Zel'dovich Observations of Galaxy Clusters with OCRA-p
• Cosmological Constraints from a 31 GHz Sky Survey with the Sunyaev-Zel'dovich Array

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