CoMaLit -- VI. Intrinsic scatter in stacked relations. The weak lensing AMICO galaxy clusters in KiDS-DR3
arXiv:2006.16264 · doi:10.1093/mnras/staa1902
Abstract
Unbiased and precise mass calibration of galaxy clusters is crucial to fully exploit galaxy clusters as cosmological probes. Stacking of weak lensing signal allows us to measure observable-mass relations down to less massive halos halos without extrapolation. We propose a Bayesian inference method to constrain the intrinsic scatter of the mass proxy in stacked analyses. The scatter of the stacked data is rescaled with respect to the individual scatter based on the number of binned clusters. We apply this method to the galaxy clusters detected with the AMICO (Adaptive Matched Identifier of Clustered Objects) algorithm in the third data release of the Kilo-Degree Survey. The results confirm the optical richness as a low scatter mass proxy. Based on the optical richness and the calibrated weak lensing mass-richness relation, mass of individual objects down to ~10^13 solar masses can be estimated with a precision of ~20 per cent.
12 pages, 6 figures; in press on MNRAS
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Cited by in corpus (10)
- AMICO galaxy clusters in KiDS-DR3: cosmological constraints from counts and stacked weak-lensing
- How baryons can significantly bias cluster count cosmology
- Exploring the contamination of the DES-Y1 Cluster Sample with SPT-SZ selected clusters
- AMICO galaxy clusters in KiDS-DR3: cosmological constraints from large-scale stacked weak lensing profiles
- AMICO galaxy clusters in KiDS-DR3: Measurement of the halo bias and power spectrum normalization from a stacked weak lensing analysis
- The miniJPAS survey: clusters and galaxy groups detection with AMICO
- AMICO galaxy clusters in KiDS-DR3: Cosmological constraints from angular power spectrum and correlation function
- AMICO galaxy clusters in KiDS-1000: cosmological constraints and mass calibration from counts and weak lensing
- AMICO galaxy clusters in KiDS-DR3: constraints on CDM from extreme value statistics
- AMICO galaxy clusters in KiDS-1000: cosmological sample