Probing the Assembly of Galaxy Clusters in HI

星系团是最新形成的系统，因此它们最有可能揭示最近进化的证据。这项研究将在中性氢中观察到两个红移最低的星系团，其中发现了宇宙演化的迹象（z = 0.2）。还将继续对最近的星系团室女座星系团进行补充研究。这些研究将有助于我们理解驱动单个星系演化的物理机制。主要工具是韦斯特博克综合射电望远镜的一个强大的新后端，它可以探测这些星团周围的巨大体积，以及光学和X射线数据。一项试点研究已经获得时间，观察工作已经开始。科学目标将集中在已被带入热星系间介质的冷气体的演变，例如气体性质的大尺度结构以及当星系靠近星系团时气体储层如何受到影响。Virgo项目是一个遗留项目，主要研究者已经建立了一个公开网页，所有结果都可以查阅。

AbstractAST 0607643van GorkomClusters are the latest systems to form, and therefore they are most likely to reveal evidence for recent evolution. This study will observe in neutral hydrogen two clusters at the lowest redshift where signs for cosmological evolution have been found (z=0.2). A complementary study of the nearest cluster of galaxies, the Virgo cluster, will also be continued. These studies will help our understanding of the physical mechanisms that drive the evolution of individual galaxies. The main tool is a powerful new backend at the Westerbork Synthesis Radio Telescope, which enables probing a huge volume around these clusters, plus optical and X-ray data. A pilot study has been awarded time, and the observations have started. The science goals will focus on the evolution of the cold gas that has been brought into the hot intergalactic medium, such as the large-scale structure in the gas properties and how the gas reservoirs get affected as the galaxies come close to the cluster. The Virgo project is a legacy project and the Principal Investigator has made a public web page where all results are available.