Weak-lensing Analysis of X-Ray-selected XXL Galaxy Groups and Clusters with Subaru HSC Data
Journal
Date Issued
2020
Author(s)
Umetsu, Keiichi
•
•
Lieu, Maggie
•
Miyatake, Hironao
•
Medezinski, Elinor
•
Nishizawa, Atsushi J.
•
Giles, Paul
•
•
McCarthy, Ian G.
•
Kilbinger, Martin
•
Birkinshaw, Mark
•
•
Okabe, Nobuhiro
•
Chiu, I. -Non
•
Coupon, Jean
•
Eckert, Dominique
•
Fujita, Yutaka
•
Higuchi, Yuichi
•
Koulouridis, Elias
•
Maughan, Ben
•
Miyazaki, Satoshi
•
Oguri, Masamune
•
Pacaud, Florian
•
Pierre, Marguerite
•
Rapetti, David
•
Smith, Graham P.
Abstract
We present a weak-lensing analysis of X-ray galaxy groups and clusters selected from the XMM-XXL survey using the first-year data from the Hyper Suprime-Cam (HSC) Subaru Strategic Program. Our joint weak-lensing and X-ray analysis focuses on 136 spectroscopically confirmed X-ray-selected systems at 0.031 ≤ z ≤ 1.033 detected in the 25 deg2 XXL-N region, which largely overlaps with the HSC-XMM field. With high-quality HSC weak-lensing data, we characterize the mass distributions of individual clusters and establish the concentration-mass (c-M) relation for the XXL sample, by accounting for selection bias and statistical effects and marginalizing over the remaining mass calibration uncertainty. We find the mass-trend parameter of the c-M relation to be $\beta =-0.07\pm 0.28$ and the normalization to be ${c}_{200}=4.8\pm 1.0\,(\mathrm{stat})\pm 0.8\,(\mathrm{syst})$ at ${M}_{200}={10}^{14}\,{h}^{-1}\,{M}_{\odot }$ and z = 0.3. We find no statistical evidence for redshift evolution. Our weak-lensing results are in excellent agreement with dark-matter-only c-M relations calibrated for recent ΛCDM cosmologies. The level of intrinsic scatter in c200 is constrained as $\sigma (\mathrm{ln}{c}_{200})\lt 24 \% $ ( $99.7 \% $ CL), which is smaller than predicted for the full population of ΛCDM halos. This is likely caused in part by the X-ray selection bias in terms of the cool-core or relaxation state. We determine the temperature-mass (TX-M500) relation for a subset of 105 XXL clusters that have both measured HSC lensing masses and X-ray temperatures. The resulting TX-M500 relation is consistent with the self-similar prediction. Our TX-M500 relation agrees with the XXL DR1 results at group scales but has a slightly steeper mass trend, implying a smaller mass scale in the cluster regime. The overall offset in the TX-M500 relation is at the ∼1.5σ level, corresponding to a mean mass offset of $34 \% \pm 20 \% $ . We also provide bias-corrected, weak-lensing-calibrated M200 and M500 mass estimates of individual XXL clusters based on their measured X-ray temperatures.
Volume
890
Issue
2
Start page
148
Issn Identifier
0004-637X
Ads BibCode
2020ApJ...890..148U
Rights
open.access
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