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Date and Time of the Query: 2019-04-25 T06:48:46 PDT
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For refcode 2011MNRAS.418.1441L:
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Copyright by Royal Astronomical Society. 2011MNRAS.418.1441L Sunyaev-Zel'dovich observations of a statistically complete sample of galaxy clusters with OCRA-p Lancaster, Katy; Birkinshaw, Mark; Gawronski, Marcin P.; Battye, Richard; Browne, Ian; Davis, Richard; Giles, Paul; Feiler, Roman; Kus, Andrzej; Lew, Bartosz; Lowe, Stuart; Maughan, Ben; Alareedh, Abdulaziz; Pazderska, Bogna; Pazderski, Eugeniusz; Peel, Mike; Roukema, Boudewijn F.; Wilkinson, Peter Abstract. We present 30-GHz Sunyaev-Zel'dovich (SZ) observations of a statistically complete sample of galaxy clusters with the One Centimetre Receiver Array-prototype (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 Comptonization parameter y_0_ exceeding 1.9 x 10^-4^, and 13 are detected at significance >=3sigma. 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 per cent. 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. Key words: methods: observational, galaxies: clusters: general, cosmology: observations
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