A Multi-Wavelength Calibration of Galaxy Clusters as Cosmological Probes

作为宇宙学探测器的星系团的多波长校准

• 批准号: 0507161
• 负责人: Zoltan Haiman
• 金额: $ 96.01万
• 依托单位: Columbia University
• 依托单位国家: 美国
• 项目类别: Continuing Grant
• 财政年份: 2005
• 资助国家: 美国
• 起止时间: 2005-07-01 至 2011-06-30
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=0507161&HistoricalAwards=false
• 关键词: Multi; Wavelength; Calibration; Galaxy; Clusters

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.

AST-0507161海曼星系团提供了测试宇宙学模型的最强大的工具之一，它们提供了对宇宙微波背景和遥远的超新星所提供的约束的补充。在多大程度上，星系团可以被校准为宇宙学探测器，这取决于几个关于它们物理性质的悬而未决的问题。这个项目将利用Sunyaev-Zel‘dovich效应、X射线和光学弱透镜数据以及理论模型来研究星系团的内部结构和演化。最终得到的大约50个星系团具有统一质量、高分辨率的数据，将与纳入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星系团结构和演化模型，量化模型不确定性对高精度宇宙学的影响，并为未来的使用提供分析工具和技术。研究将主要作为论文工作进行，由所有参与的高级研究人员指导来自代表性不足群体的两名学生。结果将被纳入玫瑰中心在纽约美国自然历史博物馆的公共宣传和教育的持续计划中。