The X-ray properties of weak-lensing-selected galaxy clusters

Giles, P.A.; Maughan, B.J.; Hamana, T.; Miyazaki, S.; Birkinshaw, M.; Ellis, R.S.; Massey, R.

doi:10.1093/mnras/stu2679

The X-ray properties of weak-lensing-selected galaxy clusters

Giles, P.A.; Maughan, B.J.; Hamana, T.; Miyazaki, S.; Birkinshaw, M.; Ellis, R.S.; Massey, R.

Authors

P.A. Giles

B.J. Maughan

T. Hamana

S. Miyazaki

M. Birkinshaw

R.S. Ellis

Professor Richard Massey r.j.massey@durham.ac.uk
Professor

Abstract

We present the results of an X-ray follow-up campaign targeting 10 weak-lensing (WL)-selected galaxy clusters from a Subaru WL survey. Archival Chandra data exist for two of the clusters, and we obtain dedicated observations of the remaining eight. The WL clusters appear to fit the same scaling relation between X-ray luminosity and temperature as X-ray-selected clusters. However, when we consider the luminosity–mass relation, the WL-selected clusters appear underluminous by a factor 2.1 ± 0.5 (or, alternatively, more massive by 1.7 ± 0.3), compared to X-ray-selected clusters with X-ray-based mass estimates. By considering the effects of the centroid offset, Eddington bias, and triaxiallity, this difference can be reconciled. We use X-ray imaging data to quantify the dynamical state of the clusters and found that one of the clusters appears dynamically relaxed, and two of the clusters host a cool core, consistent with Sunyaev–Zel'dovich-effect-selected clusters. This fraction is much lower than observed in X-ray-selected cluster samples.

Citation

Giles, P., Maughan, B., Hamana, T., Miyazaki, S., Birkinshaw, M., Ellis, R., & Massey, R. (2015). The X-ray properties of weak-lensing-selected galaxy clusters. Monthly Notices of the Royal Astronomical Society, 447(4), 3044-3059. https://doi.org/10.1093/mnras/stu2679

Journal Article Type	Article
Acceptance Date	Dec 12, 2014
Publication Date	Mar 11, 2015
Deposit Date	Feb 10, 2016
Publicly Available Date	Feb 18, 2016
Journal	Monthly Notices of the Royal Astronomical Society
Print ISSN	0035-8711
Electronic ISSN	1365-2966
Publisher	Royal Astronomical Society
Peer Reviewed	Peer Reviewed
Volume	447
Issue	4
Pages	3044-3059
DOI	https://doi.org/10.1093/mnras/stu2679
Keywords	Galaxies: clusters: general, Cosmology: observations, X-rays: galaxies: clusters.

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This article has been accepted for publication in Monthly notices of the Royal Astronomical Society ©: 2015 The Authors Published by Oxford University Press on behalf of the Royal Astronomical Society. All rights reserved.