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@article{1406178,
author = {Mantz, A. and Allen, S. W. and Morris, R. G. and Simionescu, A. and Urban, Ondrej and Werner, Norbert and Zhuravleva, I.},
article_location = {Oxford},
article_number = {3},
doi = {http://dx.doi.org/10.1093/mnras/stx2200},
keywords = {galaxies: clusters: intracluster medium; X-rays: galaxies: clusters},
language = {eng},
issn = {0035-8711},
journal = {Monthly Notices of the Royal Astronomical Society},
title = {The metallicity of the intracluster medium over cosmic time: further evidence for early enrichment},
url = {https://academic.oup.com/mnras/article/472/3/2877/4094901},
volume = {472},
year = {2017}
}
TY - JOUR
ID - 1406178
AU - Mantz, A. - Allen, S. W. - Morris, R. G. - Simionescu, A. - Urban, Ondrej - Werner, Norbert - Zhuravleva, I.
PY - 2017
TI - The metallicity of the intracluster medium over cosmic time: further evidence for early enrichment
JF - Monthly Notices of the Royal Astronomical Society
VL - 472
IS - 3
SP - 2877-2888
EP - 2877-2888
PB - OXFORD UNIV PRESS
SN - 00358711
KW - galaxies: clusters: intracluster medium
KW - X-rays: galaxies: clusters
UR - https://academic.oup.com/mnras/article/472/3/2877/4094901
N2 - We use Chandra X-ray data to measure the metallicity of the intracluster medium (ICM) in 245 massive galaxy clusters selected from X-ray and Sunyaev-Zel'dovich (SZ) effect surveys, spanning redshifts 0 < z < 1.2. Metallicities were measured in three different radial ranges, spanning cluster cores through their outskirts. We explore trends in these measurements as a function of cluster redshift, temperature and surface brightness 'peakiness' (a proxy for gas cooling efficiency in cluster centres). The data at large radii (0.5-1 r(500)) are consistent with a constant metallicity, while at intermediate radii (0.1-0.5 r(500)) we see a late-time increase in enrichment, consistent with the expected production and mixing of metals in cluster cores. In cluster centres, there are strong trends of metallicity with temperature and peakiness, reflecting enhanced metal production in the lowest entropy gas. Within the cool-core/sharply peaked cluster population, there is a large intrinsic scatter in central metallicity and no overall evolution, indicating significant astrophysical variations in the efficiency of enrichment. The central metallicity in clusters with flat surface brightness profiles is lower, with a smaller intrinsic scatter, but increases towards lower redshifts. Our results are consistent with other recent measurements of ICM metallicity as a function of redshift. They reinforce the picture implied by observations of uniform metal distributions in the outskirts of nearby clusters, in which most of the enrichment of the ICM takes place before cluster formation, with significant later enrichment taking place only in cluster centres, as the stellar populations of the central galaxies evolve.
ER -
MANTZ, A., S. W. ALLEN, R. G. MORRIS, A. SIMIONESCU, Ondrej URBAN, Norbert WERNER and I. ZHURAVLEVA. The metallicity of the intracluster medium over cosmic time: further evidence for early enrichment. \textit{Monthly Notices of the Royal Astronomical Society}. Oxford: OXFORD UNIV PRESS, 2017, vol.~472, No~3, p.~2877-2888. ISSN~0035-8711. Available from: https://dx.doi.org/10.1093/mnras/stx2200.
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