RUI: Radio Astronomy in the Service of Cosmology

RUI：射电天文学为宇宙学服务

• 批准号: 0606975
• 负责人: R. Partridge
• 金额: --
• 依托单位: Haverford College
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 2006
• 资助国家: 美国
• 起止时间: 2006-06-01 至 2010-05-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=0606975&HistoricalAwards=false
• 关键词: RUI; Radio; Astronomy; Service; Cosmology

AST-0606975PartridgeThe history and large-scale properties of the Universe are now well understood, mostly because of detailed observations of the fluctuations in the temperature of the cosmic microwave background (CMB). The crucial next step in observational cosmology is the detection and characterization of polarized fluctuations in the CMB, which are unfortunately much smaller in amplitude. The present research program has two major components: to examine the polarization of inverted spectrum and gigahertz-peaked radio sources using the Very Large Array and the Very Long Baseline Array, and to investigate the possibility that a previously undetected spectral line of neutral hydrogen (at 10GHz) might be used to investigate the epoch of reionization. The first of these will help to determine if radio sources that become prominent at high frequencies could constitute a major contaminant for future CMB polarization studies. The second is a speculative but potentially important new avenue for investigation of the early Universe.The major broader impact of this research lies in the encouragement and training of undergraduate students at a predominantly undergraduate school. Haverford College, and this researcher in particular, has a fine record of sending students on to careers in astronomy and related fields, and these projects will help maintain that record. Also included in the program are pedagogical research, writing and talks on the history of the CMB, and efforts to bring radio astronomy research to students in developing nations.

AST-0606975鹧鸪宇宙的历史和大尺度性质现在已经很好地理解了，主要是因为对宇宙微波背景（CMB）温度波动的详细观测。 观测宇宙学的下一个关键步骤是探测和表征CMB中的偏振波动，不幸的是，这些波动的振幅要小得多。 目前的研究计划有两个主要组成部分：使用甚大阵列和甚长基线阵列检查反转频谱和千兆赫峰值射电源的偏振，并调查以前未检测到的中性氢谱线（10 GHz）可能用于调查再电离时代的可能性。 其中第一个将有助于确定在高频下变得突出的射电源是否会构成未来CMB极化研究的主要污染物。 第二个是一个推测性的，但可能是重要的研究早期宇宙的新途径，这项研究的主要影响在于鼓励和培训本科生在一个主要的本科学校。 哈弗福德学院，特别是这位研究人员，在将学生送往天文学和相关领域的职业生涯方面有着良好的记录，这些项目将有助于保持这一记录。 该计划还包括教学研究，关于CMB历史的写作和讲座，以及将射电天文学研究带给发展中国家学生的努力。