Romero, Charles E. and Mason, Brian S. and Sayers, Jack and Mroczkowski, Tony and Sarazin, Craig and Donahue, Megan and Baldi, Alessandro and Clarke, Tracy E. and Young, Alexander H. and Sievers, Jonathan and Dicker, Simon R. and Reese, Erik D. and Czakon, Nicole and Devlin, Mark and Korngut, Phillip M. and Golwala, Sunil (2017) Galaxy Cluster Pressure Profiles as Determined by Sunyaev Zel’dovich Effect Observations with MUSTANG and Bolocam. II. Joint Analysis of 14 Clusters. Astrophysical Journal, 838 (2). Art. No. 86. ISSN 1538-4357. https://resolver.caltech.edu/CaltechAUTHORS:20170329-124336693
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Abstract
We present pressure profiles of galaxy clusters determined from high-resolution Sunyaev–Zel'dovich (SZ) effect observations of 14 clusters, which span the redshift range of 0.25 < z < 0.89. The procedure simultaneously fits spherical cluster models to MUSTANG and Bolocam data. In this analysis, we adopt the generalized NFW parameterization of pressure profiles to produce our models. Our constraints on ensemble-average pressure profile parameters, in this study γ, C_(500), and P_0, are consistent with those in previous studies, but for individual clusters we find discrepancies with the X-ray derived pressure profiles from the ACCEPT2 database. We investigate potential sources of these discrepancies, especially cluster geometry, electron temperature of the intracluster medium, and substructure. We find that the ensemble mean profile for all clusters in our sample is described by the parameters [γ, C_(500), P_0] = [0.3^(+0.1)_(-0.1), 1.3^(+0.1)_(-0.1), 8.6^(+2.4)_(-2.4)], cool core clusters are described by [γ, C_(500), P_0] = [0.6^(+0.1)_(-0.1), 0.9^(+0.1)_(-0.1), 3.6^+(1.5)_(-1.5)], and disturbed clusters are described by [γ, C_(500), P_0] = [0.0^(+0.1)_(-0.0), 1.5^(+0.1)_(-0.2), 13.8^(+1.6)_(-1.6)]. Of the 14 clusters, 4 have clear substructure in our SZ observations, while an additional 2 clusters exhibit potential substructure.
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| Alternate Title: | Galaxy Cluster Pressure Profiles as Determined by Sunyaev Zel'dovich Effect Observations with MUSTANG and Bolocam II: Joint Analysis of Fourteen Clusters | ||||||||||||||||||||||||||||||
| Additional Information: | © 2017 The American Astronomical Society. Received 2016 August 5; revised 2017 February 23; accepted 2017 February 28; published 2017 March 29. While at NRAO and UVA, support for C.R. was provided through the Grote Reber Fellowship administered by AUI/NRAO. Support for C.R., P.K., and A.Y. was provided by the Student Observing Support (SOS) program. Support for T.M. was partially provided by the National Research Council Research Associateship Award at the U.S. Naval Research Laboratory. Basic research in radio astronomy at NRL is supported by 6.1 Base funding. J.S. was partially supported by a Norris Foundation CCAT Postdoctoral Fellowship and by NSF/AST-1313447. The National Radio Astronomy Observatory is a facility of the National Science Foundation, which is operated under cooperative agreement with Associated Universities, Inc. The GBT observations used in this paper were taken under NRAO proposal IDs GBT/08A-056, GBT/09A-052, GBT/09C-020, GBT/09C-035, GBT/09C-059, GBT/10A-056, GBT/10C-017, GBT/10C-026, GBT/10C-031, GBT/10C-042, GBT/11A-001, and GBT/11B-009 and VLA/12A-340. We thank the GBT operators Dave Curry, Greg Monk, Dave Rose, Barry Sharp, and Donna Stricklin for their assistance. The Bolocam observations presented here were obtained form the Caltech Submillimeter Observatory, which, when the data used in this analysis were taken, was operated by the California Institute of Technology under cooperative agreement with the National Science Foundation. Bolocam was constructed and commissioned using funds from NSF/AST-9618798, NSF/AST-0098737, NSF/AST-9980846, NSF/AST-0229008, and NSF/AST-0206158. Bolocam observations were partially supported by the Gordon and Betty Moore Foundation, the Jet Propulsion Laboratory Research and Technology Development Program, as well as the National Science Council of Taiwan grant NSC100-2112-M-001-008-MY3. Access to ACCEPT2 data was possible due to the gracious assistance of Rachael Salmon. We thank the anonymous referee for helpful comments. | ||||||||||||||||||||||||||||||
| Group: | Astronomy Department | ||||||||||||||||||||||||||||||
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| Subject Keywords: | galaxies: clusters: general – galaxies: clusters: intracluster medium | ||||||||||||||||||||||||||||||
| Issue or Number: | 2 | ||||||||||||||||||||||||||||||
| Record Number: | CaltechAUTHORS:20170329-124336693 | ||||||||||||||||||||||||||||||
| Persistent URL: | https://resolver.caltech.edu/CaltechAUTHORS:20170329-124336693 | ||||||||||||||||||||||||||||||
| Official Citation: | Charles E. Romero et al 2017 ApJ 838 86 | ||||||||||||||||||||||||||||||
| Usage Policy: | No commercial reproduction, distribution, display or performance rights in this work are provided. | ||||||||||||||||||||||||||||||
| ID Code: | 75512 | ||||||||||||||||||||||||||||||
| Collection: | CaltechAUTHORS | ||||||||||||||||||||||||||||||
| Deposited By: | Tony Diaz | ||||||||||||||||||||||||||||||
| Deposited On: | 29 Mar 2017 20:45 | ||||||||||||||||||||||||||||||
| Last Modified: | 21 Dec 2020 22:47 |
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