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.
galaxies: clusters: general
cosmology: observations
cosmic background radiation
Författare
A. N. Bender
University of Colorado at Boulder
McGill University
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 Astrofísica, Óptica y Electrońica
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
Z. D. Kermish
Princeton University
M. Klein
Universität 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-Gesellschaft
D. Muders
Max-Planck-Gesellschaft
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 4 3432-3446Ämneskategorier (SSIF 2011)
Astronomi, astrofysik och kosmologi
Fundament
Grundläggande vetenskaper
Infrastruktur
Onsala rymdobservatorium
DOI
10.1093/mnras/stw1158