Journal article
Baryon content of massive galaxy clusters at 0.57 < z < 1.33
I Chiu, J Mohr, M McDonald, S Bocquet, MLN Ashby, M Bayliss, BA Benson, LE Bleem, M Brodwin, S Desai, JP Dietrich, WR Forman, C Gangkofner, AH Gonzalez, C Hennig, J Liu, CL Reichardt, A Saro, B Stalder, SA Stanford Show all
Monthly Notices of the Royal Astronomical Society | Published : 2016
Abstract
We study the stellar, brightest cluster galaxy (BCG) and intracluster medium (ICM) masses of 14 South Pole Telescope (SPT) selected galaxy clusters with median redshift z = 0.9 and mass M500 = 6 × 1014M⊙. We estimate stellar masses for each cluster and BCG using six photometric bands, the ICM mass using X-ray observations and the virial masses using the SPT Sunyaev-Zel'dovich effect signature. At z = 0.9, the BCG mass M*BCG constitutes 0.12 ± 0.01 per cent of the halo mass for a 6 × 1014M⊙ cluster, and this fraction falls as M 500 -0.58±0.07. The cluster stellar mass function has a characteristic mass M0 = 1011.0 ± 0.1M⊙, and the number of galaxies per unit mass in clusters is larger than in..
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Funding Acknowledgements
[ "We acknowledge the support by the DFG Cluster of Excellence 'Origin and Structure of the Universe' and the Transregio programme TR33 'The Dark Universe'. The calculations have been carried out on the computing facilities of the Computational Center for Particle and Astrophysics (C2PAP) and of the Leibniz Supercomputer Center (LRZ). BB is supported by the Fermi Research Alliance, LLC under Contract No. De-AC02-07CH11359 with the United States Department of Energy. BS acknowledges the support of the NSF grants at Harvard and SAO (AST-1009012, AST-1009649 and MRI-0723073). TS acknowledges the support from the German Federal Ministry of Economics and Technology (BMWi) provided through DLR under project 50 OR 1210. The South Pole Telescope is supported by the National Science Foundation through grant ANT-0638937. Partial support is also provided by the NSF Physics Frontier Center grant PHY-0114422 to the Kavli Institute of Cosmological Physics at the University of Chicago, the Kavli Foundation and the Gordon and Betty Moore Foundation.", "Optical imaging data from the VLT programmes 088.A-0889 and 089.A-0824, HST imaging data from programmes C18-12246 and C19-12447, and Spitzer Space Telescope imaging from programmes 60099, 70053 and 80012 enable the SED fitting in this analysis. X-ray data obtained with Chandra X-ray Observatory programmes and XMM-Newton Observatory programme 067501 enable the ICM mass measurements. The SPT survey programme SPT-SZ enabled the discovery of these high-redshift clusters and subsequent analyses have enabled virial mass estimates of these systems. Optical spectroscopic data from VLT programmes 086.A-0741 and 286.A-5021 and Gemini programme GS-2009B-Q-16, GS-2011A-C-3 and GS-2011B-C-6 were included in this work. Additional spectroscopic data were obtained with the 6.5 m Magellan Telescopes." ]