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- W2888317634 abstract "We investigate the spatial distribution of iron in the intra-cluster medium in a selected sample of 41 relaxed clusters in the redshift range $0.05 < z < 1.03$ using {sl Chandra} archival data. We compute the azimuthally-averaged, deprojected $Z_{rm Fe}$ profile of each cluster out to $sim 0.4r_{500}$, and identify a peak in the distribution of iron followed by a flatter distribution at larger radii. Due to the steep gradient both in gas density and abundance, we find that the emission-weighted iron abundance within $0.2r_{500}$, which entirely includes the iron peak in most of the cases, is on average $sim$25% higher than the mass-weighted value, showing that spatially resolved analysis and accurate deprojection are key to study the evolution of iron enrichment in the very central regions of cool core clusters. We quantify the extent of the iron distribution in each cluster with a normalized scale parameter $r_{rm Fe}$, defined as the radius where the iron abundance excess is half of its peak value. We find that $r_{rm Fe}$ increases by a factor of $sim 3$ from $zsim 1$ to $zsim 0.1$, suggesting that the spatial distribution of iron in the ICM extends with time, possibly due to the mixing with the mechanical-mode feedback from the central galaxy. We also find that the iron mass excess within $0.3r_{500}$, when normalized to the total baryonic mass within the same region, does not evolve significantly, showing that this iron mass component is already established at $zsim 1$." @default.
- W2888317634 created "2018-08-31" @default.
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- W2888317634 date "2018-08-23" @default.
- W2888317634 modified "2023-10-15" @default.
- W2888317634 title "Spatial distribution of metals in the ICM: evolution of the iron excess in relaxed galaxy clusters" @default.
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- W2888317634 doi "https://doi.org/10.1093/mnras/sty2294" @default.
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