Lensing Measurements of Sz-discovered Clusters in the Southern Cosmology Survey
نویسندگان
چکیده
We present the first lensing mass measurements of Sunyaev-Zel’dovich (SZ) selected clusters. Using optical imaging from the Southern Cosmology Survey (SCS), we present weak lensing masses for three clusters selected by their SZ emission in the South Pole Telescope survey (SPT). Curiously, we find one additional 2.5σ peak in the lensing maps which seems to coincide with a low significance peak in the published SZ maps. We also study 38 optically-selected clusters in ≃ 8 square degrees of the SCS survey. We fit Navarro, Frenk and White (NFW) profiles, and find that the SZ clusters have amongst the largest masses, as high as 5×10M⊙. Using the best fit masses for all the clusters, we analytically calculate the expected SZ integrated Y parameter for comparison with the SPT observations. Subject headings: gravitational lensing — cosmology: observations — galaxies: clusters: general
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First lensing measurements of SZ-detected clusters
We present the first lensing mass measurements of Sunyaev-Zel’dovich (SZ) selected clusters. Using optical imaging from the Southern Cosmology Survey (SCS), we present weak lensing masses for three clusters selected by their SZ emission in the South Pole Telescope survey (SPT). We confirm that the SZ selection procedure is successful in detecting mass concentrations. We also study 38 optically-...
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