Galaxy cluster scaling relations measured with APEX-SZ
Artikel i vetenskaplig tidskrift, 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.

cosmology: observations

cosmic background radiation

galaxies: clusters: general

Författare

A. N. Bender

McGill University

University of Colorado at Boulder

J. Kennedy

McGill University

P., Ade

Cardiff University

K. Basu

Universität Bonn

F. Bertoldi

Universität Bonn

S. Burkutean

Universität Bonn

John Clarke

University of California

Lawrence Berkeley National Laboratory

Daniel Dahlin

Chalmers, Rymd- och geovetenskap, Radioastronomi och astrofysik

M. Dobbs

McGill University

D. Ferrusca

Instituto Nacional de Astrofisica Optica y Electronica

D. Flanigan

University of California

N. W. Halverson

University of Colorado at Boulder

W. L. Holzapfel

University of California

Cathy Horellou

Chalmers, Rymd- och geovetenskap, Radioastronomi och astrofysik

B. R. Johnson

Columbia University in the City of New York

Z. D. Kermish

Princeton University

M. Klein

Universität Bonn

R. Kneissl

European Southern Observatory Santiago

Atacama Large Millimeter-submillimeter Array

T. Lanting

McGill University

A. T. Lee

Lawrence Berkeley National Laboratory

University of California

J. Mehl

University of California

K. M. Menten

Max Planck-institutet

D. Muders

Max Planck-institutet

A. Nagarajan

Universität Bonn

F. Pacaud

Universität Bonn

C. L. Reichardt

University of California

P. L. Richards

University of California

R. Schaaf

Universität Bonn

D. Schwan

University of California

M. W. Sommer

Universität 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 3432-3446

Ämneskategorier

Astronomi, astrofysik och kosmologi

Fundament

Grundläggande vetenskaper

Infrastruktur

Onsala rymdobservatorium

DOI

10.1093/mnras/stw1158