The evolution of cool-core clusters
The evolution of cool-core clusters
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DOI：
10.1051/0004-6361/201015208
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发表时间：
2010-08
影响因子：
6.5
通讯作者：
Joana S. Santos;P. Tozzi;P. Rosati;H. Boehringer
中科院分区：
文献类型：
--
作者：
Joana S. Santos;P. Tozzi;P. Rosati;H. Boehringer
上下文。冷核星团在团内介质（ICM）的x射线辐射中具有很强的表面亮度峰。这种现象与ICM中的复杂物理有关，近年来一直是激烈辩论和研究的主题。由于小样本统计和分析高红移星团的观测挑战，冷核的演化仍然受到很差的约束。目标。为了量化冷核星团种群的演变，我们在一个具有代表性的本地星团样本和迄今为止可用的最大的高红移星团样本中稳健地测量了冷核强度。方法。我们使用了三个具有代表性的簇样本的高分辨率钱德拉数据，它们跨越了不同的红移范围：(i)低红移范围
Context. Cool-core clusters are characterized by strong surface brightness peaks in the X-ray emission from the Intra Cluster Medium (ICM). This phenomenon is associated with complex physics in the ICM and has been a subject of intense debate and investigation in recent years. The evolution of cool-cores is still poorly constrained because of the small sample statistics and the observational challenge of analysing high redshift clusters. Aims. In order to quantify the evolution in the cool-core cluster population, we robustly measure the cool-core strength in a local, representative cluster sample, and in the largest sample of high-redshift clusters available to date. Methods. We use high-resolution Chandra data of three representative cluster samples spanning different redshift ranges: (i) the low