Galaxy cluster scaling relations measured with APEX-SZ
Journal article, 2016

We present thermal Sunyaev-Zel'dovich effect (SZE) measurements for 42 galaxy clusters observed at 150 GHz with the APEX-SZ experiment. For each cluster, we model the pressure profile and calculate the integrated Comptonization Y to estimate the total thermal energy of the intraclustermedium (ICM). We compare the measured Y values to X-ray observables of the ICM from the literature (cluster gas mass M-gas, temperature T-X, and Y-X = MgasTX) that relate to total cluster mass. We measure power-law scaling relations, including an intrinsic scatter, between the SZE and X-ray observables for three subsamples within the set of 42 clusters that have uniform X-ray analysis in the literature. We observe that differences between these X-ray analyses introduce significant variance into the measured scaling relations, particularly affecting the normalization. For all three subsamples, we find results consistent with a selfsimilarmodel of cluster evolution dominated by gravitational effects. Comparing to predictions from numerical simulations, these scaling relations prefer models that include cooling and feedback in the ICM. Lastly, we measure an intrinsic scatter of similar to 28 per cent in the Y - Y-X scaling relation for all three subsamples.

galaxies: clusters: general

cosmology: observations

cosmic background radiation

Author

A. N. Bender

University of Colorado at Boulder

McGill University

J. Kennedy

McGill University

P., Ade

Cardiff University

K. Basu

University of Bonn

F. Bertoldi

University of Bonn

S. Burkutean

University of Bonn

John Clarke

University of California

Lawrence Berkeley National Laboratory

Daniel Dahlin

Chalmers, Earth and Space Sciences, Radio Astronomy and Astrophysics

M. Dobbs

McGill University

D. Ferrusca

National Institute of Astrophysics, Optics and Electronics

D. Flanigan

University of California

N. W. Halverson

University of Colorado at Boulder

W. L. Holzapfel

University of California

Cathy Horellou

Chalmers, Earth and Space Sciences, Radio Astronomy and Astrophysics

B. R. Johnson

Columbia University in the City of New York

Z. D. Kermish

Princeton University

M. Klein

University of Bonn

R. Kneissl

European Southern Observatory Santiago

Atacama Large Millimeter-submillimeter Array (ALMA)

T. Lanting

McGill University

A. T. Lee

Lawrence Berkeley National Laboratory

University of California

J. Mehl

University of California

K. M. Menten

Max Planck Society

D. Muders

Max Planck Society

A. Nagarajan

University of Bonn

F. Pacaud

University of Bonn

C. L. Reichardt

University of California

P. L. Richards

University of California

R. Schaaf

University of Bonn

D. Schwan

University of California

M. W. Sommer

University of Bonn

H. Spieler

Lawrence Berkeley National Laboratory

C. Tucker

Cardiff University

B. Westbrook

University of California

Monthly Notices of the Royal Astronomical Society

0035-8711 (ISSN) 1365-2966 (eISSN)

Vol. 460 4 3432-3446

Subject Categories

Astronomy, Astrophysics and Cosmology

Roots

Basic sciences

Infrastructure

Onsala Space Observatory

DOI

10.1093/mnras/stw1158

More information

Latest update

9/6/2018 7