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Title: Sunyaev-Zel'dovich Effect and X-ray Scaling Relations from Weak-Lensing Mass Calibration of 32 SPT Selected Galaxy Clusters

Journal Article · · Monthly Notices of the Royal Astronomical Society
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Uncertainty in mass-observable scaling relations is currently the limiting factor for galaxy-cluster-based cosmology. Weak gravitational lensing can provide direct mass calibration and reduce the mass uncertainty. We present new ground-based weak lensing observations of 19 South Pole Telescope (SPT) selected clusters at redshifts 0.29 <= z <= 0.61 and combine them with previously reported space-based observations of 13 galaxy clusters at redshifts 0.576 <= z <= 1.132 to constrain the cluster mass scaling relations with the Sunyaev-Zel'dovich effect (SZE), the cluster gas mass M-gas and Y-X, the product of M-gas and X-ray temperature. We extend a previously used framework for the analysis of scaling relations and cosmological constraints obtained from SPT-selected clusters to make use of weak lensing information. We introduce a new approach to estimate the effective average redshift distribution of background galaxies and quantify a number of systematic errors affecting the weak lensing modelling. These errors include a calibration of the bias incurred by fitting a Navarro-Frenk-White profile to the reduced shear using N-body simulations. We blind the analysis to avoid confirmation bias. We are able to limit the systematic uncertainties to 5.6% in cluster mass (68% confidence). Our constraints on the mass-X-ray observable scaling relation parameters are consistent with those obtained by earlier studies and our constraints for the mass-SZE scaling relation are consistent with the simulation-based prior used in the most recent SPT-SZ cosmology analysis. We can now replace the external mass calibration priors used in previous SPT-SZ cosmology studies with a direct, internal calibration obtained for the same clusters.

Research Organization:
Argonne National Laboratory (ANL), Argonne, IL (United States)
Sponsoring Organization:
USDOE Office of Science - Office of High Energy Physics; National Aeronautics and Space Administration (NASA); National Science Foundation (NSF)
DOE Contract Number:
AC02-06CH11357
OSTI ID:
1530574
Journal Information:
Monthly Notices of the Royal Astronomical Society, Vol. 483, Issue 3
Country of Publication:
United States
Language:
English

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Covariance matrices for galaxy cluster weak lensing: from virial regime to uncorrelated large-scale structure journal September 2019
Dark Energy Survey Year 1 results: validation of weak lensing cluster member contamination estimates from P(z) decomposition journal August 2019
Mass calibration of the CODEX cluster sample using SPIDERS spectroscopy – I. The richness–mass relation journal March 2019
Weak lensing measurements of the APEX-SZ galaxy cluster sample journal June 2019
Weak-lensing Mass Calibration of ACTPol Sunyaev–Zel’dovich Clusters with the Hyper Suprime-Cam Survey journal April 2019
The Aemulus Project. II. Emulating the Halo Mass Function journal February 2019
Cluster Cosmology Constraints from the 2500 deg 2 SPT-SZ Survey: Inclusion of Weak Gravitational Lensing Data from Magellan and the Hubble Space Telescope journal June 2019
The redshift evolution of X-ray and Sunyaev–Zel’dovich scaling relations in the fable simulations journal August 2019
Using X-Ray Morphological Parameters to Strengthen Galaxy Cluster Mass Estimates via Machine Learning journal October 2019
Dark Energy Survey Year 1 results: the effect of intracluster light on photometric redshifts for weak gravitational lensing journal July 2019
The redshift evolution of X-ray and Sunyaev-Zel'dovich scaling relations in the FABLE simulations text January 2019
Dark Energy Survey Year 1 results: Validation of weak lensing cluster member contamination estimates from P(z) decomposition text January 2018
The redshift evolution of X-ray and Sunyaev-Zel'dovich scaling relations in the FABLE simulations text January 2019
Covariance matrices for galaxy cluster weak lensing: from virial regime to uncorrelated large-scale structure text January 2019
Weak lensing measurements of the APEX-SZ galaxy cluster sample text January 2019

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Related Subjects

cosmology: observations
galaxies: clusters: general
gravitational lensing: weak