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

Giles, P. A. and Maughan, B. J. and Hamana, T. and Miyazaki, S. and Birkinshaw, M. and Ellis, R. S. and Massey, R. (2015) The X-ray properties of weak-lensing-selected galaxy clusters. Monthly Notices of the Royal Astronomical Society, 447 (4). pp. 3044-3059. ISSN 0035-8711.

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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.

Item Type:Article
Related URLs:
URLURL TypeDescription DOIArticle
Miyazaki, S.0000-0001-9818-1513
Ellis, R. S.0000-0001-7782-7071
Additional Information:© 2015 The Authors. Published by Oxford University Press on behalf of the Royal Astronomical Society. Accepted 2014 December 12. Received 2014 November 12; in original form 2013 December 9. First published online January 14, 2015. We thank Massimo Meneghetti for providing data in electronic format of his simulated clusters. PAG also acknowledges support from the UK Science and Technology Facilities Council.
Funding AgencyGrant Number
Science and Technology Facilities Council (STFC)UNSPECIFIED
Subject Keywords:galaxies: clusters: general; cosmology: observations; X-rays: galaxies: clusters
Issue or Number:4
Record Number:CaltechAUTHORS:20150403-082135140
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Official Citation:P. A. Giles, B. J. Maughan, T. Hamana, S. Miyazaki, M. Birkinshaw, R. S. Ellis, and R. Massey The X-ray properties of weak-lensing-selected galaxy clusters MNRAS (March 11, 2015) Vol. 447 3044-3059 doi:10.1093/mnras/stu2679 First published online January 14, 2015
Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:56327
Deposited By: Tony Diaz
Deposited On:03 Apr 2015 19:48
Last Modified:09 Mar 2020 13:19

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