GALAXY CLUSTERS AT z {>=} 1: GAS CONSTRAINTS FROM THE SUNYAEV-ZEL'DOVICH ARRAY

Journal Article · Mon Nov 01 00:00:00 EDT 2010 · Astrophysical Journal Letters

DOI:https://doi.org/10.1088/2041-8205/723/1/L78· OSTI ID:21452707

Culverhouse, T L; Carlstrom, J E; Gralla, M B; Greer, C; Hennessy, R; Leitch, E M; Marrone, D P; Pryke, C; Sharp, M ^[1]; Bonamente, M; Bulbul, E; Hasler, N; Jetha, N N ^[2]; Hawkins, D; Lamb, J W; Muchovej, S; Woody, D ^[3]; Joy, M ^[4]; Miller, A; Mroczkowski, T ^[5]

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1. Kavli Institute for Cosmological Physics, University of Chicago, Chicago, IL 60637 (United States)
2. Department of Physics, University of Alabama, Huntsville, AL 35899 (United States)
3. California Institute of Technology, Owens Valley Radio Observatory, Big Pine, CA 93513 (United States)
4. Space Sciences-VP62, NASA Marshall Space Flight Center, Huntsville, AL 35812 (United States)
5. Columbia Astrophysics Laboratory, Columbia University, New York, NY 10027 (United States)

We present gas constraints from Sunyaev-Zel'dovich (SZ) effect measurements in a sample of 11 X-ray and infrared (IR) selected galaxy clusters at z{>=}1, using data from the Sunyaev-Zel'dovich Array (SZA). The cylindrically integrated Compton-y parameter, Y, is calculated by fitting the data to a two-parameter gas pressure profile. Where possible, we also determine the temperature of the hot intracluster plasma from Chandra and XMM-Newton data and constrain the gas mass within the same aperture (r {sub 2500}) as Y. The SZ effect is detected in the clusters for which the X-ray data indicate gas masses above {approx}10{sup 13} M {sub sun}, including XMMU J2235 - 2557 at redshift z = 1.39, which to date is one of the most distant clusters detected using the SZ effect. None of the IR-selected targets are detected by the SZA measurements, indicating low gas masses for these objects. For these and the four other undetected clusters, we quote upper limits on Y and M {sub gas,SZ}, with the latter derived from scaling relations calibrated with lower redshift clusters. We compare the constraints on Y and X-ray-derived gas mass M {sub gas,X-ray} to self-similar scaling relations between these observables determined from observations of lower redshift clusters, finding consistency given the measurement error.

• OSTI ID: 21452707
• Journal Information: Astrophysical Journal Letters, Journal Name: Astrophysical Journal Letters Journal Issue: 1 Vol. 723; ISSN 2041-8205
• Country of Publication: United States
• Language: English

Related Subjects

79 ASTRONOMY AND ASTROPHYSICS
BACKGROUND RADIATION
COSMOLOGY
ELECTROMAGNETIC RADIATION
GALAXY CLUSTERS
IONIZING RADIATIONS
MASS
RADIATIONS
RED SHIFT
X RADIATION