Mass Dependent Bias in the Local Universe

当地宇宙中的质量相关偏差

• 批准号: 1311820
• 负责人: Chris Miller
• 金额: $ 35.86万
• 依托单位: Regents of the University of Michigan - Ann Arbor
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 2013
• 资助国家: 美国
• 起止时间: 2013-09-01 至 2017-08-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=1311820&HistoricalAwards=false
• 关键词: Mass; Dependent; Bias; Local; Universe

Professor Miller and his group will study the spatial distribution of galaxy clusters, paying specific attention to the bias of cluster-sized dark matter halos. Such a bias results from massive dark matter halos forming within the largest fluctuations in the primordial matter density field. This induces a correlation between the halo mass and the amplitude of the clustering itself. Observational constraints on bias are a prerequisite to high precision cosmology using galaxy clusters. The program will publish a sample of approximately 1000 clusters with measured masses and well characterized errors.Broader impacts of the work include training of a graduate student, building tutorials for web-based astronomy tools which lead non-specialists through some of the greatest astronomical discoveries, allowing non-scientists to discover for themselves the fundamental laws of the Universe.

米勒教授和他的小组将研究星系团的空间分布，特别关注星系团大小的暗物质晕的偏差。这样的偏差是由于在原始物质密度场的最大波动中形成了大量的暗物质晕。这导致晕质量和集群本身的幅度之间的相关性。观测偏差的限制是利用星系团进行高精度宇宙学的先决条件。 该计划将公布一个大约1000个星团的样本，这些星团具有测量的质量和很好的特征误差。这项工作的更广泛的影响包括培训一名研究生，为基于网络的天文学工具建立教程，引导非专业人员通过一些最伟大的天文学发现，让非科学家自己发现宇宙的基本规律。