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**Kiiveri, K.; Gruen, D.; Finoguenov, A.; Erben, T.; Waerbeke, L. van; Rykoff, E.; Miller, L.; Hagstotz, S.; Dupke, R.; Henry, J. Patrick; Kneib, J.-P.; Gozaliasl, G.; Kirkpatrick, C. C.; Cibirka, N.; Clerc, N.; Costanzi, M.; Cypriano, E. S.; Rozo, E.; Shan, H.; Spinelli, P.; Valiviita, J. and Weller, Jochen ORCID: https://orcid.org/0000-0002-8282-2010 (2021): CODEX weak lensing mass catalogue and implications on the mass-richness relation. In: Monthly Notices of the Royal Astronomical Society, Vol. 502, No. 1: pp. 1494-1526**

**Full text not available from 'Open Access LMU'.**

## Abstract

The COnstrain Dark Energy with X-ray clusters (CODEX) sample contains the largest flux limited sample of X-ray clusters at 0.35 < z < 0.65. It was selected from ROSAT data in the 10 000 square degrees of overlap with BOSS, mapping a total number of 2770 high-z galaxy clusters. We present here the full results of the CFHT CODEX programme on cluster mass measurement, including a reanalysis of CFHTLS Wide data, with 25 individual lensing-constrained cluster masses. We employ LENSFIT shape measurement and perform a conservative colour-space selection and weighting of background galaxies. Using the combination of shape noise and an analytic covariance for intrinsic variations of cluster profiles at fixed mass due to large-scale structure, miscentring, and variations in concentration and ellipticity, we determine the likelihood of the observed shear signal as a function of true mass for each cluster. We combine 25 individual cluster mass likelihoods in a Bayesian hierarchical scheme with the inclusion of optical and X-ray selection functions to derive constraints on the slope alpha, normalization beta, and scatter sigma(ln lambda vertical bar mu) of our richness-mass scaling relation model in log-space: < In lambda vertical bar mu > = alpha mu + beta, with mu = ln (M-200c/M-piv), and M-piv = 10(14.81)M(circle dot). We find a slope alpha = 0.49(-0.15)(+0.20) , normalization exp(beta) = 84.0(-14.8)(+9.2) , and sigma(ln lambda vertical bar mu) = 0.17(-0.09)(+0.13) using CFHT richness estimates. In comparison to other weak lensing richness-mass relations, we find the normalization of the richness statistically agreeing with the normalization of other scaling relations from a broad redshift range (0.0 < z < 0.65) and with different cluster selection (X-ray, Sunyaev-Zeldovich, and optical).

Item Type: | Journal article |
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Faculties: | Physics > Astronomy and astrophysics, cosmology |

Subjects: | 500 Science > 530 Physics |

ISSN: | 0035-8711 |

Language: | English |

Item ID: | 99538 |

Date Deposited: | 05. Jun 2023, 15:31 |

Last Modified: | 10. May 2024, 08:36 |