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首页> 外文期刊>The Astrophysical journal >INTRACLUSTER STARS AND THE CHEMICAL ENRICHMENT OF THE INTRACLUSTER MEDIUM
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INTRACLUSTER STARS AND THE CHEMICAL ENRICHMENT OF THE INTRACLUSTER MEDIUM

机译：鞘内星和鞘内介质的化学富集

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摘要

We explore the contribution of intracluster stars (ICS) to the chemical enrichment history of the intracluster medium (ICM). In contrast to scenarios in which all the metals originate in cluster galaxies and are then transported into the ICM, ICS enrich the ICM in situ, thereby contributing 100% of their supernovae ejecta directly into the ICM. Modeling the ICS as an ancient single-burst stellar population with a normal initial mass function, we generate ICM iron abundances in the range of the observed values of several tenths solar. Large observational and theoretical uncertainties preclude us from concluding that the ICS are the primary contributor of metals to the ICM in general. However, for the two clusters in our sample and one from the literature, for which all of the required observational constraints exist, we are able to reproduce between half and all of the ICM iron with this simple model. Because of the ubiquity of ICS in clusters and their direct connection with the ICM, we conclude that all models of the chemical enrichment history and energy budget of the ICM should account for the impact of the ICS.
机译：我们探讨了集群内星（ICS）对集群内介质（ICM）的化学富集历史的贡献。与所有金属都起源于星团星系然后被运入ICM的场景相反，ICS会原位富集ICM，从而将其超新星喷射的100％直接贡献给ICM。将ICS建模为具有正常初始质量函数的古代单爆发恒星种群，我们在十分之几的太阳观测值范围内生成ICM铁丰度。较大的观测和理论不确定性使我们无法得出结论，ICS总体上是ICM中金属的主要贡献者。但是，对于我们样本中的两个星团和文献中的两个星团，由于存在所有必需的观测约束，我们可以使用此简单模型重现一半到全部ICM铁。由于ICS在集群中无处不在，并且与ICM直接相关，因此我们得出结论，ICM的化学富集历史和能量收支的所有模型都应考虑ICS的影响。

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