The Effect of Mixing on Metallicity Gradients in the Intracluster Medium
The Effect of Mixing on Metallicity Gradients in the Intracluster Medium
复制标题
混合对簇内介质金属度梯度的影响
DOI：
10.1086/341199
复制
发表时间：
2002
期刊：
影响因子：
--
通讯作者：
M. Brüggen
中科院分区：
文献类型：
--
作者：
M. Brüggen
一般认为，大多数星系团都有冷却流，其中中心的辐射冷却导致缓慢的流入。然而，钱德拉和XMM最近的观测结果与预测的冷却流率相冲突。有人认为，位于星系团中心的射电喷流可以帮助减少冷气体的沉积。射电喷流使热射电等离子体空腔膨胀，这些空腔穿过星系团大气层上升，从而搅动星系团内的介质。在这封信中，我们调查这种情况是否与已观察到的集群的核心明显的金属丰度梯度一致。
It is generally argued that most clusters of galaxies host cooling flows in which radiative cooling in the center causes a slow inflow. However, recent observations by Chandra and XMM conflict with the predicted cooling flow rates. It has been suggested that radio jets that are situated at the center of clusters of galaxies can assist in reducing the deposition of cold gas. Radio jets inflate cavities of hot radio plasma that rise through the cluster atmosphere and thus stir the intracluster medium. In this Letter, we investigate whether this scenario is consistent with the pronounced metallicity gradients that have been observed in the cores of clusters.