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arXiv · 2504.10588

Chemical enrichment of ICM within the A3266 cluster I: radial profiles

E. Gatuzz·J. Sanders·A. Liu·A. Fabian·C. Pinto·H. Russell·D. Eckert·S. Walker·J. ZuHone·R. Mohapatra
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Abstract

We present a detailed study of the elemental abundances distribution of the intracluster medium (ICM) within the A3266 cluster using {\it XMM-Newton} observations. This analysis uses EPIC-pn data, including a new energy scale calibration, which allows us to measure velocities with uncertainties down to $\Delta v \sim 80$ km/s, and MOS observations. We measured radial O, Mg, Si, S, Ar, Ca, and Fe profiles. This is the first study of elemental abundances beyond Fe using X-ray observations within the A3266 cluster. The abundance profiles display discontinuities similar to those obtained for the temperature. We modeled the X/Fe ratio profiles with a linear combination of type~Ia supernovae (SNIa) and core-collapse supernovae (SNcc) models. We found that the SNIa ratio over the total cluster enrichment tends to be uniform, with a $42\pm 5\%$ contribution. Such a trend supports an early ICM enrichment scenario, with most metals produced before clustering.

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E. Gatuzz, J. Sanders, A. Liu, A. Fabian, C. Pinto, H. Russell, D. Eckert, S. Walker, J. ZuHone, R. Mohapatra. 2025-04-14. Chemical enrichment of ICM within the A3266 cluster I: radial profiles. https://doi.org/10.1051/0004-6361%2F202453360

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