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Published July 10, 2015 | Submitted + Published
Journal Article Open

Galaxy Cluster Pressure Profiles, as Determined by Sunyaev Zeldovich Effect Observations with MUSTANG and Bolocam I: Joint Analysis Technique


We present a technique to constrain galaxy cluster pressure profiles by jointly fitting Sunyaev-Zeldovich effect (SZE) data obtained with MUSTANG and Bolocam for the clusters Abell 1835 and MACS0647. Bolocam and MUSTANG probe different angular scales and are thus highly complementary. We find that the addition of the high-resolution MUSTANG data can improve constraints on pressure profile parameters relative to those derived solely from Bolocam. In Abell 1835 and MACS0647, we find gNFW inner slopes of γ=0.36^(+0.33)_(-0.21) and γ=0.38^(+0.20)_(0.25), respectively, when α and β are constrained to 0.86 and 4.67, respectively. The fitted SZE pressure profiles are in good agreement with X-ray derived pressure profiles.

Additional Information

© 2015 The American Astronomical Society. Received 2014 December 22; accepted 2015 April 28; published 2015 July 7. We thank the anonymous referee whose suggestions have improved this manuscript. Support for C.R. was provided through the Reber Fellowship. Support for C.R., P.K., and A.Y. was provided by the Student Observing Support (SOS) program. Support for T.M. is 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. Additional funding has been provided by NSF/AST-1309032. 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 AGBT09A052, AGBT09C059, AGBT11A009, and AGBT11B001 with the assistance of GBT operators Dave Curry, Greg Monk, Dave Rose, Barry Sharp, and Donna Stricklin. The Bolocam observations presented here were obtained from 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.

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Published - 0004-637X_807_2_121.pdf

Submitted - 1501.00187v2.pdf


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