A Multi-Wavelength Calibration of Galaxy Clusters as Cosmological Probes

星系团为测试宇宙模型提供了最强大的工具之一，它们提供了宇宙微波背景和遥远超新星提供的补充约束。星系团能在多大程度上被校准为宇宙探测器，取决于它们的物理性质的几个尚未解决的问题。该项目将利用Sunyaev-Zel'dovich效应、x射线和光学弱透镜数据以及理论建模来研究星系团的内部结构和演化。由此产生的大约50个星团的目录具有统一的质量，高分辨率的数据，将与包含非引力物理的最先进的数值模拟进行比较。这将约束和校准物理集群结构和演化模型，量化模型不确定性对高精度宇宙学的影响，并为未来使用提供分析工具和技术。这项研究将主要作为论文工作，由两名来自代表性不足的群体的学生进行，由所有参与的高级研究人员指导。研究结果将被纳入玫瑰中心在纽约美国自然历史博物馆继续开展的公众宣传和教育项目中。

AST-0507161HaimanGalaxy clusters provide one of the most powerful tools to test cosmological models, and they deliver constraints that are complementary to those provided by the cosmic microwave background and distant supernovae. The extent to which clusters can be calibrated to serve as cosmological probes hinges on several unresolved issues about their physical nature. This project will study the internal structure and evolution of galaxy clusters, using Sunyaev-Zel'dovich effect, X-ray, and optical weak lensing data, and theoretical modeling. The resulting catalog of about 50 clusters with uniform quality, high-resolution data will be compared to state-of-the-art numerical simulations that incorporate non-gravitational physics. This will constrain and calibrate physical cluster structure and evolution models, quantify the impact of model uncertainties on high precision cosmology, and provide analysis tools and techniques for future use.The research will be carried out primarily as thesis work for two students from under-represented groups, mentored by all of the senior researchers involved. Results will be incorporated into the Rose Center's continuing programs of public outreach and education at the American Museum of Natural History in New York.