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Planck all-sky y-map and interpretation

Abstract : We have constructed all-sky Compton parameters maps (y-maps) of the thermal Sunyaev-Zeldovich (tSZ) effect by applying specifically tailoredcomponent separation algorithms to the 30 to 857 GHz frequency channel maps from the Planck satellite survey. These reconstructed y-maps are delivered as part of the Planck 2015 release. The y-maps are characterized in terms of noise properties and residual foreground contamination, mainly thermal dust emission at large angular scales and CIB and extragalactic point sources at small angular scales. Specific masks are defined to minimize foreground residuals and systematics. Using these masks, we compute the y-map angular power spectrum and higher order statistics.From these we conclude that the y-map is dominated by tSZ signal in the multipole range, 20 < ` < 600. We compare the measured tSZ powerspectrum and higher order statistics to various physically motivated models and discuss the implications of our results in terms of cluster physics and cosmology.
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http://hal.in2p3.fr/in2p3-01132488
Contributor : Emmanuelle Vernay <>
Submitted on : Tuesday, March 17, 2015 - 1:11:40 PM
Last modification on : Thursday, November 19, 2020 - 12:59:05 PM

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  • HAL Id : in2p3-01132488, version 1

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J.F. Macias Perez. Planck all-sky y-map and interpretation. Snowcluster 2015 – The Physics of Galaxy Cluster, Mar 2015, Snowbird, United States. ⟨in2p3-01132488⟩

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