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Title: SUNYAEV-ZEL'DOVICH-MEASURED PRESSURE PROFILES FROM THE BOLOCAM X-RAY/SZ GALAXY CLUSTER SAMPLE

Abstract

We describe Sunyaev-Zel'dovich (SZ) effect measurements and analysis of the intracluster medium (ICM) pressure profiles of a set of 45 massive galaxy clusters imaged using Bolocam at the Caltech Submillimeter Observatory. We deproject the average pressure profile of our sample into 13 logarithmically spaced radial bins between 0.07R{sub 500} and 3.5R{sub 500}, and we find that a generalized Navarro, Frenk, and White (gNFW) profile describes our data with sufficient goodness-of-fit and best-fit parameters (C{sub 500}, {alpha}, {beta}, {gamma}, P{sub 0} = 1.18, 0.86, 3.67, 0.67, 4.29). We use X-ray data to define cool-core and disturbed subsamples of clusters, and we constrain the average pressure profiles of each of these subsamples. We find that, given the precision of our data, the average pressure profiles of disturbed and cool-core clusters are consistent with one another at R {approx}> 0.15R{sub 500}, with cool-core systems showing indications of higher pressure at R {approx}< 0.15R{sub 500}. In addition, for the first time, we place simultaneous constraints on the mass scaling of cluster pressure profiles, their ensemble mean profile, and their radius-dependent intrinsic scatter between 0.1R{sub 500} and 2.0R{sub 500}. The scatter among profiles is minimized at radii between {approx_equal} 0.2R{sub 500} and {approx_equal} 0.5R{sub 500},more » with a value of {approx_equal} 20%. These results for the intrinsic scatter are largely consistent with previous analyses, most of which have relied heavily on X-ray derived pressures of clusters at significantly lower masses and redshifts compared to our sample. Therefore, our data provide further evidence that cluster pressure profiles are largely universal with scatter of {approx_equal} 20%-40% about the universal profile over a wide range of masses and redshifts.« less

Authors:
; ; ; ; ;  [1];  [2]; ; ;  [3]; ; ;  [4]; ;  [5];  [6]
  1. Division of Physics, Math, and Astronomy, California Institute of Technology, Pasadena, CA 91125 (United States)
  2. Kavli Institute for Cosmological Physics, University of Chicago, 5640 South Ellis Avenue, Chicago, IL 60637 (United States)
  3. University of Southern California, Los Angeles, CA 90089 (United States)
  4. Institute of Astronomy and Astrophysics, Academia Sinica, P.O. Box 23-141, Taipei 10617, Taiwan (China)
  5. H. H. Wills Physics Laboratory, University of Bristol, Tyndall Avenue, Bristol Bs8 ITL (United Kingdom)
  6. LeCosPA Center, National Taiwan University, Taipei 10617, Taiwan (China)
Publication Date:
OSTI Identifier:
22126682
Resource Type:
Journal Article
Journal Name:
Astrophysical Journal
Additional Journal Information:
Journal Volume: 768; Journal Issue: 2; Other Information: Country of input: International Atomic Energy Agency (IAEA); Journal ID: ISSN 0004-637X
Country of Publication:
United States
Language:
English
Subject:
79 ASTROPHYSICS, COSMOLOGY AND ASTRONOMY; ACCURACY; GALAXY CLUSTERS; LIMITING VALUES; MASS; RED SHIFT; SCALING; SPACE; X RADIATION

Citation Formats

Sayers, J., Czakon, N. G., Golwala, S. R., Downes, T. P., Mroczkowski, T., Siegel, S., Mantz, A., Ameglio, S., Pierpaoli, E., Shitanishi, J. A., Koch, P. M., Lin, K. -Y., Umetsu, K., Maughan, B. J., Van der Pyl, N., Molnar, S. M., and Moustakas, L., E-mail: jack@caltech.edu. SUNYAEV-ZEL'DOVICH-MEASURED PRESSURE PROFILES FROM THE BOLOCAM X-RAY/SZ GALAXY CLUSTER SAMPLE. United States: N. p., 2013. Web. doi:10.1088/0004-637X/768/2/177.
Sayers, J., Czakon, N. G., Golwala, S. R., Downes, T. P., Mroczkowski, T., Siegel, S., Mantz, A., Ameglio, S., Pierpaoli, E., Shitanishi, J. A., Koch, P. M., Lin, K. -Y., Umetsu, K., Maughan, B. J., Van der Pyl, N., Molnar, S. M., & Moustakas, L., E-mail: jack@caltech.edu. SUNYAEV-ZEL'DOVICH-MEASURED PRESSURE PROFILES FROM THE BOLOCAM X-RAY/SZ GALAXY CLUSTER SAMPLE. United States. doi:10.1088/0004-637X/768/2/177.
Sayers, J., Czakon, N. G., Golwala, S. R., Downes, T. P., Mroczkowski, T., Siegel, S., Mantz, A., Ameglio, S., Pierpaoli, E., Shitanishi, J. A., Koch, P. M., Lin, K. -Y., Umetsu, K., Maughan, B. J., Van der Pyl, N., Molnar, S. M., and Moustakas, L., E-mail: jack@caltech.edu. Fri . "SUNYAEV-ZEL'DOVICH-MEASURED PRESSURE PROFILES FROM THE BOLOCAM X-RAY/SZ GALAXY CLUSTER SAMPLE". United States. doi:10.1088/0004-637X/768/2/177.
@article{osti_22126682,
title = {SUNYAEV-ZEL'DOVICH-MEASURED PRESSURE PROFILES FROM THE BOLOCAM X-RAY/SZ GALAXY CLUSTER SAMPLE},
author = {Sayers, J. and Czakon, N. G. and Golwala, S. R. and Downes, T. P. and Mroczkowski, T. and Siegel, S. and Mantz, A. and Ameglio, S. and Pierpaoli, E. and Shitanishi, J. A. and Koch, P. M. and Lin, K. -Y. and Umetsu, K. and Maughan, B. J. and Van der Pyl, N. and Molnar, S. M. and Moustakas, L., E-mail: jack@caltech.edu},
abstractNote = {We describe Sunyaev-Zel'dovich (SZ) effect measurements and analysis of the intracluster medium (ICM) pressure profiles of a set of 45 massive galaxy clusters imaged using Bolocam at the Caltech Submillimeter Observatory. We deproject the average pressure profile of our sample into 13 logarithmically spaced radial bins between 0.07R{sub 500} and 3.5R{sub 500}, and we find that a generalized Navarro, Frenk, and White (gNFW) profile describes our data with sufficient goodness-of-fit and best-fit parameters (C{sub 500}, {alpha}, {beta}, {gamma}, P{sub 0} = 1.18, 0.86, 3.67, 0.67, 4.29). We use X-ray data to define cool-core and disturbed subsamples of clusters, and we constrain the average pressure profiles of each of these subsamples. We find that, given the precision of our data, the average pressure profiles of disturbed and cool-core clusters are consistent with one another at R {approx}> 0.15R{sub 500}, with cool-core systems showing indications of higher pressure at R {approx}< 0.15R{sub 500}. In addition, for the first time, we place simultaneous constraints on the mass scaling of cluster pressure profiles, their ensemble mean profile, and their radius-dependent intrinsic scatter between 0.1R{sub 500} and 2.0R{sub 500}. The scatter among profiles is minimized at radii between {approx_equal} 0.2R{sub 500} and {approx_equal} 0.5R{sub 500}, with a value of {approx_equal} 20%. These results for the intrinsic scatter are largely consistent with previous analyses, most of which have relied heavily on X-ray derived pressures of clusters at significantly lower masses and redshifts compared to our sample. Therefore, our data provide further evidence that cluster pressure profiles are largely universal with scatter of {approx_equal} 20%-40% about the universal profile over a wide range of masses and redshifts.},
doi = {10.1088/0004-637X/768/2/177},
journal = {Astrophysical Journal},
issn = {0004-637X},
number = 2,
volume = 768,
place = {United States},
year = {2013},
month = {5}
}