Probing Cosmological Parameters and Cluster Gas Physics through Measurements of the Sunyaev-Zel'dovich Spectrum

AST-0407212丘奇星系团是优秀的宇宙学探测器，能够测量宇宙中的质量分布及其膨胀动力学。 测量Sunyaev-Zel'dovich效应（SZE），这是宇宙微波背景（CMB）光子的逆散射的热气体在集群，确定集群特有的速度，而不需要经验的距离指标。 这项研究将继续Sunyaev-Zel'dovich红外实验（SuZIE），使用具有额外频率覆盖范围的新接收器，能够进行更快，更高精度的测量。 这项研究将测量100个星团，确定密度参数和宇宙微波背景辐射温度随红移的变化，接收器将可用于其他能够利用其多频能力的研究。 参与SuZIE的学生将学习最先进的仪器技术，包括光学和电子设计和制造。 这项研究将继续涉及大学生，在过去，其中一半以上是女性。 该团队还将继续进行公开演讲，并参加斯坦福大学为学生和教师举办的高中项目。

AST-0407212ChurchGalaxy clusters are excellent cosmological probes, capable of measuring both the mass distribution in the universe and the dynamics of its expansion. Measurement of the Sunyaev-Zel'dovich effect (SZE), which is the inverse scattering of cosmic microwave background (CMB) photons by hot gas in clusters, determines cluster peculiar velocities without the need for empirical distance indicators. This research will continue the Sunyaev-Zel'dovich Infrared Experiment (SuZIE), using a new receiver with additional frequency coverage, capable of faster, higher precision measurements. The study will measure 100 clusters, determining the density parameter and the variation of the temperature of the CMB as a function of redshift.The receiver will be available for other investigations that can use its multi-frequency capabilities. Students involved with SuZIE will learn start-of-the-art instrumental techniques, including optical and electronics design and fabrication. The research will continue to involve undergraduates, and in the past more than half of them have been women. The team will also continue giving public talks and participating in Stanford high school programs for students and teachers.