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

通过测量 Sunyaev-Zeldovich 谱来探测宇宙学参数和团簇气体物理

• 批准号: 0407212
• 负责人: Sarah Church
• 金额: $ 49.86万
• 依托单位: Stanford University
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 2004
• 资助国家: 美国
• 起止时间: 2004-07-01 至 2007-06-30
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=0407212&HistoricalAwards=false
• 关键词: Probing; Cosmological; Parameters; Cluster; Gas

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.

AST-0407212 ChurchGalaxy星系团是一种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的动力学。测量Sunyaev-Zel‘dovich效应(SZE)，即宇宙微波背景(CMB)光子被星团中的热气体反向散射，可以确定星团的特殊速度，而不需要经验距离指示器。这项研究将继续Sunyaev-Zel‘dovich红外实验(Suzie)，使用一种具有额外频率覆盖的新接收器，能够进行更快、更高精度的测量。这项研究将测量100个星系团，确定CMB的密度参数和温度随红移的变化。接收器将用于其他可以利用其多频功能的研究。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本科生，在过去，他们中有一半以上是女性。该团队还将继续进行公开演讲，并参与斯坦福大学面向学生和教师的高中项目。