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Constraints on the Mass, Concentration, and Nonthermal Pressure Support of Six CLASH Clusters from a Joint Analysis of X-ray, SZ, and Lensing Data

Siegel, Seth R. and Sayers, Jack and Mahdavi, Andisheh and Donahue, Megan and Merten, Julian and Zitrin, Adi and Meneghetti, Massimo and Umetsu, Keiichi and Czakon, Nicole G. and Golwala, Sunil R. and Postman, Marc and Koch, Patrick M. and Koekemoer, Anton M. and Lin, Kai-Yang and Melchior, Peter and Molnar, Sandor M. and Moustakas, Leonidas and Mroczkowski, Tony K. and Pierpaoli, Elena and Shitanishi, Jennifer A. (2018) Constraints on the Mass, Concentration, and Nonthermal Pressure Support of Six CLASH Clusters from a Joint Analysis of X-ray, SZ, and Lensing Data. Astrophysical Journal, 861 (1). Art. No. 71. ISSN 1538-4357. doi:10.3847/1538-4357/aac5f8.

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We present a joint analysis of Chandra X-ray observations, Bolocam thermal Sunyaev–Zel'dovich (SZ) effect observations, Hubble Space Telescope (HST) strong-lensing data, and HST and Subaru Suprime-Cam weak-lensing data. The multiwavelength data set is used to constrain parametric models for the distribution of dark and baryonic matter in a sample of six massive galaxy clusters selected from the Cluster Lensing And Supernova survey with Hubble (CLASH). For five of the six clusters, the multiwavelength data set is well described by a relatively simple model that assumes spherical symmetry, hydrostatic equilibrium, and entirely thermal pressure support. The joint analysis yields considerably better constraints on the total mass and concentration of the clusters compared to analysis of any one data set individually. The resulting constraints are consistent with simulation-based predictions for the concentration–mass relation. The subsample of five galaxy clusters is used to place an upper limit on the fraction of pressure support in the intracluster medium (ICM) due to nonthermal processes, such as turbulence and bulk flow of the gas. We constrain the nonthermal pressure fraction at r_(500c) to be <0.11 at 95% confidence. This is in tension with state-of-the-art hydrodynamical simulations, which predict a nonthermal pressure fraction of ≈0.25 at r_(500c) for clusters of similar mass and redshift. This tension may be explained by the sample selection and/or our assumption of spherical symmetry.

Item Type:Article
Related URLs:
URLURL TypeDescription Paper
Siegel, Seth R.0000-0003-2631-6217
Sayers, Jack0000-0002-8213-3784
Mahdavi, Andisheh0000-0002-8111-3343
Donahue, Megan0000-0002-2808-0853
Zitrin, Adi0000-0002-0350-4488
Meneghetti, Massimo0000-0003-1225-7084
Umetsu, Keiichi0000-0002-7196-4822
Golwala, Sunil R.0000-0002-1098-7174
Postman, Marc0000-0002-9365-7989
Koch, Patrick M.0000-0003-2777-5861
Koekemoer, Anton M.0000-0002-6610-2048
Lin, Kai-Yang0000-0002-8698-7277
Melchior, Peter0000-0002-8873-5065
Molnar, Sandor M.0000-0002-4227-956X
Moustakas, Leonidas0000-0003-3030-2360
Mroczkowski, Tony K.0000-0003-3816-5372
Pierpaoli, Elena0000-0002-7957-8993
Additional Information:© 2018 The American Astronomical Society. Received 2016 December 18; revised 2018 May 13; accepted 2018 May 14; published 2018 July 5. We acknowledge the assistance of the day crew and Hilo staff of the Caltech Submillimeter Observatory, who provided invaluable assistance during commissioning and data-taking for the Bolocam data set; and Kathy Deniston, Barbara Wertz, and Diana Bisel, who provided effective administrative support at Caltech and in Hilo. This research made extensive use of high-performance computing resources at the Caltech Center for Advanced Computing Research and the SFSU Facility for Space and Terrestrial Advanced Research. S.R.S. was supported by NASA Earth and Space Science Fellowship NASA/NNX12AL62H and a generous donation from the Gordon and Betty Moore Foundation. J.S. was supported by NSF/AST1313447, NASA/NNX11AB07G, and the Norris Foundation CCAT Postdoctoral Fellowship. A.Z. is supported by NASA through Hubble Fellowship grant No. HST-HF2-51334.001-A awarded by STScI, which is operated by the Association of Universities for Research in Astronomy, Inc., under NASA contract NAS 5-26555. J.M. has received funding from the People Programme (Marie Curie Actions) of the European Unions Seventh Framework Programme (FP7/2007-2013) under REA grant agreement No. 627288. Facilities: Caltech Submillimeter Observatory - , Chandra - , Hubble Space Telescope - , Subaru - .
Group:Astronomy Department
Funding AgencyGrant Number
NASA Earth and Space Science FellowshipNNX12AL62H
Gordon and Betty Moore FoundationUNSPECIFIED
Kenneth T. and Eileen L. Norris FoundationUNSPECIFIED
NASA Hubble FellowshipHST-HF2- 51334.001-A
NASANAS 5-26555
Marie Curie Fellowship627288
Subject Keywords:galaxies: clusters: general – galaxies: clusters: individual (Abell 383, Abell 611, 1423.8+2404, MACS J1532.8+3021) – galaxies: clusters: intracluster medium
Issue or Number:1
Record Number:CaltechAUTHORS:20170601-094159097
Persistent URL:
Official Citation:Seth R. Siegel et al 2018 ApJ 861 71
Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:77886
Deposited By: Ruth Sustaita
Deposited On:01 Jun 2017 20:53
Last Modified:15 Nov 2021 17:34

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