Weak lensing Analysis of X-ray-selected XXL Galaxy Groups and Clusters with Subaru HSC Data

Keiichi Umetsu, Mauro Sereno, Maggie Lieu, Hironao Miyatake, Elinor Medezinski, Atsushi J. Nishizawa, Paul Giles, Fabio Gastaldello, Ian G. McCarthy, Martin Kilbinger, Mark Birkinshaw, Stefano Ettori, Nobuhiro Okabe, I-Non Chiu, Jean Coupon, Dominique Eckert, Yutaka Fujita, Yuichi Higuchi, Elias Koulouridis, Ben MaughanSatoshi Miyazaki, Masamune Oguri, Florian Pacaud, Marguerite Pierre, David Rapetti, Graham P. Smith

Research output: Contribution to journalArticle (Academic Journal)

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 25sqdeg XXL-N region. We characterize the mass distributions of individual XXL clusters and establish their concentration-mass (c-M) relation down to group scales, 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 c200 = 4.8 \pm 1.0 (stat) \pm 0.8 (syst) at M200=10^{14}Msun/h 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 LCDM cosmologies. The level of intrinsic scatter in c200 is constrained as \sigma(\ln[c200]) <24% (99.7% CL), which is smaller than predicted for the full population of LCDM halos. This is likely caused by the X-ray selection bias in terms of the 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 1.5\sigma level, corresponding to a mean mass offset of (34\pm 20)%. We also provide bias-corrected, weak-lensing-calibrated M500 mass estimates of individual XXL clusters based on their measured X-ray temperatures.
Original languageEnglish
JournalAstrophysical Journal
Publication statusAccepted/In press - 23 Sep 2019

Bibliographical note

Submitted to ApJ; 32 pages, 20 figures

Keywords

  • astro-ph.CO
  • astro-ph.GA

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    Umetsu, K., Sereno, M., Lieu, M., Miyatake, H., Medezinski, E., Nishizawa, A. J., Giles, P., Gastaldello, F., McCarthy, I. G., Kilbinger, M., Birkinshaw, M., Ettori, S., Okabe, N., Chiu, I-N., Coupon, J., Eckert, D., Fujita, Y., Higuchi, Y., Koulouridis, E., ... Smith, G. P. (Accepted/In press). Weak lensing Analysis of X-ray-selected XXL Galaxy Groups and Clusters with Subaru HSC Data. Astrophysical Journal. https://arxiv.org/abs/1909.10524