Clusters of Galaxies: Key to Galaxy Evolution and Cosmological Physics

Sarah汉森博士被授予NSF天文学和天体物理学博士后奖学金，在加州大学圣克鲁斯分校开展研究和教育计划。汉森博士将利用星系团的新的和最近的观测，以解决星系演化和宇宙学的关键悬而未决的问题。PI将描述在光学和Sunyaev-Zeldovich（SZ）联合调查中确定的星系团中z~1的星系群。她将使用这些系统的光学特性的测量分布来（a）约束星系形成和演化的模型和（B）通过减少质量可观测关系中的散射来改善宇宙学参数估计。这项工作将是第一次在大质量暗物质晕中的星系演化研究，并使用来自SZ调查的星系团样本。汉森博士还将与加州州立数学与科学暑期学校（COSMOS）项目合作，开发一门课程，旨在与来自加州的有前途的高中生分享天体物理学探究和研究的兴奋。此外，通过与加州教学（CalTeach）计划合作，汉森博士将在高中科学课程中为教师提供与天体物理学相关的培训和专业发展机会。

Dr. Sarah Hansen is awarded an NSF Astronomy and Astrophysics Postdoctoral Fellowship to carry out a program of research and education at the University of California-Santa Cruz. Dr. Hansen will utilize new and recent observations of galaxy clusters to address key outstanding issues in galaxy evolution and cosmology. The PI will characterize the population of galaxies in clusters to z~1 identified in a joint optical and Sunyaev-Zeldovich (SZ) survey. She will use the measured distribution of optical properties of these systems to (a) constrain models of galaxy formation and evolution and (b) improve cosmological parameter estimation by decreasing the scatter in the mass-observable relationship. This work will be the first time that the evolution of galaxies in massive dark matter halos has been studied with a sample of clusters derived from an SZ survey.Dr. Hansen will also partner with the California State Summer School for Mathematics and Science (COSMOS) program to develop a course designed to share the excitement of astrophysical inquiry and research with promising high school students from California. Furthermore, by partnering with the California Teach (CalTeach) program, Dr. Hansen will initiate opportunities for teacher training and professional development relating to astrophysics in the high school science curriculum.