LIU, ANGANGLIUTOZZI, PaoloPaoloTOZZIYu, HengHengYuDE GRANDI, SabrinaSabrinaDE GRANDIETTORI, STEFANOSTEFANOETTORI2020-12-282020-12-2820180035-8711http://hdl.handle.net/20.500.12386/29204We investigate the spatial distribution of iron in the intracluster medium (ICM) in a selected sample of 41 relaxed clusters in the redshift range 0.05 < z < 1.03 using Chandra archival data. We compute the azimuthally averaged, deprojected Z<SUB>Fe</SUB> profile of each cluster out to ∼0.4r<SUB>500</SUB>, 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<SUB>500</SUB>, which entirely includes the iron peak in most of the cases, is on average ∼25 per cent 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<SUB>Fe</SUB>, defined as the radius where the iron abundance excess is half of its peak value. We find that r<SUB>Fe</SUB> increases by a factor of ∼3 from z ∼ 1 to z ∼ 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<SUB>500</SUB>, 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 z ∼ 1.STAMPAenArticle10.1093/mnras/sty22942-s2.0-85054093018000449651400027https://academic.oup.com/mnras/article/481/1/361/50783752018MNRAS.481..361LFIS/05 - ASTRONOMIA E ASTROFISICAERC sectors::Physical Sciences and Engineering::PE9 Universe sciences: astro-physics/chemistry/biology; solar systems; stellar, galactic and extragalactic astronomy, planetary systems, cosmology, space science, instrumentation