CoMaLit - II. The scaling relation between mass and Sunyaev-Zel'dovich signal for Planck selected galaxy clusters
Date Issued
2015
Author(s)
Description
MS thanks Stefano Andreon for highlighting discussions. LM and MS acknowledge financial contributions from contracts ASI/INAF n.I/023/12/0 ‘Attività relative alla fase B2/C per la missione Euclid’, PRIN MIUR 2010-2011 ‘The dark Universe and the cosmic evolution of baryons: from current surveys to Euclid’, and PRIN INAF 2012 ‘The Universe in the box: multiscale simulations of cosmic structure’. SE acknowledges the financial contribution from contracts ASI-INAF I/009/10/0 and PRIN-INAF 2012 ‘A unique data set to address the most compelling open questions about X-Ray Galaxy Clusters’.
Abstract
We discuss the scaling relation between mass and integrated Compton parameter of a sample of galaxy clusters from the all-sky Planck Sunyaev-Zel'dovich catalogue. Masses were measured with either weak lensing, caustics techniques, or assuming hydrostatic equilibrium. The retrieved Y500-M500 relation does not strongly depend on the calibration sample. We found a slope of 1.4-1.9, in agreement with self-similar predictions, with an intrinsic scatter of 20 ± 10 per cent. The absolute calibration of the relation cannot be ascertained due to systematic differences of ̃20-40 per cent in mass estimates reported by distinct groups. Due to the scatter, the slope of the conditional scaling relation, to be used in cosmological studies of number counts, is shallower, ̃1.1-1.6. The regression methods employed account for intrinsic scatter in the mass measurements too. We found that Planck mass estimates suffer from a mass-dependent bias.
Volume
450
Issue
4
Start page
3649
Issn Identifier
0035-8711
Ads BibCode
2015MNRAS.450.3649S
Rights
open.access
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77_CoMaLit - II. The scaling relation between mass and Sunyaev-Zel'dovich signal for Planck selected galaxy clusters_MNRAS-2015-Sereno-3649-64.pdf
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