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Date and Time of the Query: 2019-04-19 T06:13:37 PDT
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For refcode 2012ApJ...760...67R:
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2012ApJ...760...67R The Y_SZ_-Y_X_ Scaling Relation as Determined from Planck and Chandra Rozo, Eduardo; Vikhlinin, Alexey; More, Surhud Abstract. Sunyaev-Zeldovich (SZ) clusters surveys, such as Planck, the South Pole Telescope, and the Atacama Cosmology Telescope, will soon be publishing several hundred SZ-selected systems. The key ingredient required to transport the mass calibration from current X-ray-selected cluster samples to these SZ systems is the Y_SZ_-Y_X_ scaling relation. We constrain the amplitude, slope, and scatter of the Y_SZ_-Y_X_ scaling relation using SZ data from Planck and X-ray data from Chandra. We find a best-fit amplitude of ln (D ^2^_ A_ Y_SZ_/CY_X_) = --0.202 +/- 0.024 at the pivot point CY_X_ = 8 x 10^--5^ Mpc^2^. This corresponds to a Y_SZ_/Y_X_ ratio of 0.82 +/- 0.024, in good agreement with X-ray expectations after including the effects of gas clumping. The slope of the relation is {alpha} = 0.916 +/- 0.032, consistent with unity at ~2.3sigma. We are unable to detect intrinsic scatter, and find no evidence that the scaling relation depends on cluster dynamical state. Key words: galaxies: clusters: general
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