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CLASH: Weak-lensing Shear-and-magnification Analysis of 20 Galaxy Clusters

Umetsu, Keiichi and Medezinski, Elinor and Nonino, Mario and Merten, Julian and Postman, Marc and Meneghetti, Massimo and Donahue, Megan and Czakon, Nicole and Molino, Alberto and Seitz, Stella and Gruen, Daniel and Lemze, Doron and Balestra, Italo and Benítez, Narciso and Biviano, Andrea and Broadhurst, Tom and Ford, Holland and Grillo, Claudio and Koekemoer, Anton and Melchior, Peter and Mercurio, Amata and Moustakas, John and Rosati, Piero and Zitrin, Adi (2014) CLASH: Weak-lensing Shear-and-magnification Analysis of 20 Galaxy Clusters. Astrophysical Journal, 795 (2). Art. No. 163. ISSN 0004-637X. http://resolver.caltech.edu/CaltechAUTHORS:20141202-083947177

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Abstract

We present a joint shear-and-magnification weak-lensing analysis of a sample of 16 X-ray-regular and 4 high-magnification galaxy clusters at 0.19 ≾ z ≾ 0.69 selected from the Cluster Lensing And Supernova survey with Hubble (CLASH). Our analysis uses wide-field multi-color imaging, taken primarily with Suprime-Cam on the Subaru Telescope. From a stacked-shear-only analysis of the X-ray-selected subsample, we detect the ensemble-averaged lensing signal with a total signal-to-noise ratio of ≃ 25 in the radial range of 200-3500 kpc h^(–1), providing integrated constraints on the halo profile shape and concentration-mass relation. The stacked tangential-shear signal is well described by a family of standard density profiles predicted for dark-matter-dominated halos in gravitational equilibrium, namely, the Navarro-Frenk-White (NFW), truncated variants of NFW, and Einasto models. For the NFW model, we measure a mean concentration of c_(200c)=4.01^(+0.35)_(-0.32) at an effective halo mass of M_(200c)=1.34^(+0.10)_(-0.09) x 10^(15)M_☉. We show that this is in excellent agreement with Λ cold dark matter (ΛCDM) predictions when the CLASH X-ray selection function and projection effects are taken into account. The best-fit Einasto shape parameter is ɑ_E=0.191^(+0.071)_(-0.068), which is consistent with the NFW-equivalent Einasto parameter of ~0.18. We reconstruct projected mass density profiles of all CLASH clusters from a joint likelihood analysis of shear-and-magnification data and measure cluster masses at several characteristic radii assuming an NFW density profile. We also derive an ensemble-averaged total projected mass profile of the X-ray-selected subsample by stacking their individual mass profiles. The stacked total mass profile, constrained by the shear+magnification data, is shown to be consistent with our shear-based halo-model predictions, including the effects of surrounding large-scale structure as a two-halo term, establishing further consistency in the context of the ΛCDM model.


Item Type:Article
Related URLs:
URLURL TypeDescription
http://iopscience.iop.org/0004-637X/795/2/163PublisherArticle
http://dx.doi.org/10.1088/0004-637X/795/2/163DOIArticle
http://arxiv.org/abs/1404.1375arXivDiscussion Paper
ORCID:
AuthorORCID
Umetsu, Keiichi0000-0002-7196-4822
Postman, Marc0000-0002-9365-7989
Meneghetti, Massimo0000-0003-1225-7084
Donahue, Megan0000-0002-2808-0853
Gruen, Daniel0000-0003-3270-7644
Koekemoer, Anton0000-0002-6610-2048
Melchior, Peter0000-0002-8873-5065
Zitrin, Adi0000-0002-0350-4488
Additional Information:© 2014 American Astronomical Society. Received 2014 April 9; accepted 2014 August 11; published 2014 October 28. We thank the anonymous referee for the careful reading of the manuscript and constructive suggestions. We acknowledge fruitful discussions with Nobuhiro Okabe, Masamune Oguri, Mauro Sereno, Jean Coupon, and Hitoshi Hanami. We thank Ole Host for providing very helpful comments on the manuscript. We are grateful to all members of the CLASH team who enabled us to carry out the work. We acknowledge the Subaru Support Astronomers, plus Justice Bruursema, Kai-Yang Lin, and Hiroaki Nishioka, for assistance with our Subaru observations. We thank Nick Kaiser and Masamune Oguri for making their imcat and glafic packages publicly available. This work is partially supported by the Academia Sinica Career Development Award and by the Ministry of Science and Technology of Taiwan through grants NSC100-2112-M-001-008-MY3 and MOST 103-2112-M-001-030-MY3. J.M. acknowledges support from the Jet Propulsion Laboratory, California Institute of Technology, under a contract with the National Aeronautics and Space Administration. D.G. and S.S. were supported by SFB-Transregio 33 “The Dark Universe” by the Deutsche Forschungsgemeinschaft (DFG) and the DFG cluster of excellence “Origin and Structure of the Universe.” Support for A.Z. was provided by NASA through Hubble Fellowship grant #HST-HF-51334.01-A awarded by STScI. The Dark Cosmology Centre is funded by the Danish National Research Foundation.
Funders:
Funding AgencyGrant Number
Academia SinicaUNSPECIFIED
National Science Council (Taipei)NSC100-2112-M-001-008-MY3
Ministry of Science and Technology (Taipei)MOST 103-2112-M-001-030-MY3
NASA/JPL/CaltechUNSPECIFIED
Deutsche Forschungsgemeinschaft (DFG)SFB/Transregio 33
NASA Hubble FellowshipHST-HF-51334.01-A
Danish National Research FoundationUNSPECIFIED
Subject Keywords:cosmology: observations; dark matter; galaxies: clusters: general; gravitational lensing: weak
Record Number:CaltechAUTHORS:20141202-083947177
Persistent URL:http://resolver.caltech.edu/CaltechAUTHORS:20141202-083947177
Official Citation:CLASH: Weak-lensing Shear-and-magnification Analysis of 20 Galaxy Clusters Keiichi Umetsu et al. 2014 ApJ 795 163
Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:52258
Collection:CaltechAUTHORS
Deposited By: Ruth Sustaita
Deposited On:02 Dec 2014 21:13
Last Modified:27 Mar 2019 20:11

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