SIMBAD references

2017MNRAS.470.4583U - Mon. Not. R. Astron. Soc., 470, 4583-4599 (2017/October-1)

A uniform metallicity in the outskirts of massive, nearby galaxy clusters.

URBAN O., WERNER N., ALLEN S.W., SIMIONESCU A. and MANTZ A.

Abstract (from CDS):

Suzaku measurements of a homogeneous metal distribution of Z ∼ 0.3 Solar in the outskirts of the nearby Perseus cluster suggest that chemical elements were deposited and mixed into the intergalactic medium before clusters formed, likely over 10 billion years ago. A key prediction of this early enrichment scenario is that the intracluster medium in all massive clusters should be uniformly enriched to a similar level. Here, we confirm this prediction by determining the iron abundances in the outskirts (r > 0.25r200) of a sample of 10 other nearby galaxy clusters observed with Suzaku for which robust measurements based on the Fe-K lines can be made. Across our sample, the iron abundances are consistent with a constant value, ZFe = 0.316 ± 0.012 Solar (χ2 = 28.85 for 25 degrees of freedom). This is remarkably similar to the measurements for the Perseus cluster of ZFe = 0.314 ± 0.012 Solar, using the Solar abundance scale of Asplund et al.

Abstract Copyright: © 2017 The Authors Published by Oxford University Press on behalf of the Royal Astronomical Society

Journal keyword(s): galaxies: clusters: intracluster medium - X-rays: galaxies: clusters - X-rays: galaxies: clusters

Simbad objects: 17

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2019.12.12-22:22:01

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