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Enrichment of the Hot Intracluster Medium: Numerical Simulations
Space Science Reviews ( IF 9.1 ) Pub Date : 2018-11-19 , DOI: 10.1007/s11214-018-0557-7
V. Biffi , F. Mernier , P. Medvedev

The distribution of chemical elements in the hot intracluster medium (ICM) retains valuable information about the enrichment and star formation histories of galaxy clusters, and on the feedback and dynamical processes driving the evolution of the cosmic baryons. In the present study we review the progresses made so far in the modelling of the ICM chemical enrichment in a cosmological context, focusing in particular on cosmological hydrodynamical simulations. We will review the key aspects of embedding chemical evolution models into hydrodynamical simulations, with special attention to the crucial assumptions on the initial stellar mass function, stellar lifetimes and metal yields, and to the numerical limitations of the modelling. At a second stage, we will overview the main simulation results obtained in the last decades and compare them to X-ray observations of the ICM enrichment patterns. In particular, we will discuss how state-of-the-art simulations are able to reproduce the observed radial distribution of metals in the ICM, from the core to the outskirts, the chemical diversity depending on cluster thermo-dynamical properties, the evolution of ICM metallicity and its dependency on the system mass from group to cluster scales. Finally, we will discuss the limitations still present in modern cosmological, chemical, hydrodynamical simulations and the perspectives for improving the theoretical modelling of the ICM enrichment in galaxy clusters in the future.

中文翻译:

热簇内介质的富集:数值模拟

热簇内介质 (ICM) 中化学元素的分布保留了有关星系团的富集和恒星形成历史以及驱动宇宙重子演化的反馈和动力学过程的宝贵信息。在本研究中,我们回顾了迄今为止在宇宙学背景下 ICM 化学富集建模方面取得的进展,特别关注宇宙学流体动力学模拟。我们将回顾将化学演化模型嵌入流体动力学模拟的关键方面,特别关注初始恒星质量函数、恒星寿命和金属产率的关键假设,以及建模的数值限制。在第二阶段,我们将概述过去几十年获得的主要模拟结果,并将它们与 ICM 富集模式的 X 射线观测结果进行比较。特别是,我们将讨论最先进的模拟如何能够重现观察到的 ICM 中金属的径向分布,从核心到外围,取决于簇热力学特性的化学多样性, ICM 金属丰度及其对从群尺度到群尺度的系统质量的依赖。最后,我们将讨论现代宇宙学、化学、流体动力学模拟中仍然存在的局限性,以及未来改进星系团中 ICM 富集理论模型的前景。我们将讨论最先进的模拟如何能够重现观察到的 ICM 中金属的径向分布,从核心到外围,取决于簇热力学特性的化学多样性,ICM 金属丰度的演变和它对从群到群尺度的系统质量的依赖。最后,我们将讨论现代宇宙学、化学、流体动力学模拟中仍然存在的局限性,以及未来改进星系团中 ICM 富集理论模型的前景。我们将讨论最先进的模拟如何能够重现观察到的 ICM 中金属的径向分布,从核心到外围,取决于簇热力学特性的化学多样性,ICM 金属丰度的演变和它对从群到群尺度的系统质量的依赖。最后,我们将讨论现代宇宙学、化学、流体动力学模拟中仍然存在的局限性,以及未来改进星系团中 ICM 富集理论模型的前景。
更新日期:2018-11-19
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