The APEX Sunyaev-Zeldovich Galaxy Cluster Survey

星系团是宇宙大规模演化的理想见证者，也是研究包含宇宙中大部分重子物质的热等离子体物理的优秀实验室。我们的APEX-SZ调查项目首次公布了使用大量多路复合、超导、过渡边缘传感器进行观测的科学结果，并继续产生前所未有的科学数据。自2007年春季投入使用以来，在三次观测中，我们已经绘制了十多个星系团的地图，包括大范围的质量和红移，并获得了选定的“空白”区域的深度成像数据。我们一直专注于组合SZE-X射线分析来模拟星系团内气体物理，我们一直在进行多频成像观测，以研究结构和调查SZE污染物，如星暴和射电星系。我们请求继续为我们国际协作的三个德国中心成员提供资金，以便大力开展我们对星系团的性质和演化、星系团内炽热气体的物理以及星系团质量标度关系的研究，这些都是星系团宇宙学调查的关键基础。

Galaxy clusters are ideal witnesses of the cosmic large-scale evolution, and excellent laboratories to study the physics of the hot plasma that contains the bulk of the baryonic matter in the universe. Our APEX-SZ survey project presented the first published scientific results from observations with a large array of multiplexed, superconducting, transition edge sensors, and continues to produce unprecedented scientific data. In three observing runs since its commissioning in Spring 2007, we have mapped more than ten galaxy clusters, encompassing a wide range in mass and redshift, and obtained deep imaging data on selected “blank” fields. We have been focusing on a combined SZE-X-ray analysis to model the intra-cluster gas physics, and we have been pursuing multi-frequency imaging observations to study structure and to investigate SZE contaminants such as starburst and radio galaxies. We request continued funding for the three central German members of our international collaboration, in order to strongly pursue our research on the properties and evolution of galaxy clusters, on the physics of the hot intra-cluster gas, and on the cluster mass scaling relations, which are the crucial basis for cluster cosmology surveys.