Collaborative Proposal for PAPER -- Precision Array to Probe the Epoch of Reionization

PAPER合作提案——精密阵列探测再电离时代

• 批准号: 0607759
• 负责人: Richard Bradley
• 金额: --
• 依托单位: University of Virginia Main Campus
• 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: 2006-07-15 至 2009-06-30
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=0607759&HistoricalAwards=false
• 关键词: Collaborative; Proposal; PAPER; Precision; Array

This is a collaborative project, lead 0607838/Backer, non-lead 0607759/Bradley.When the first stars formed from the densest regions of the evolving cosmic structure, their ultraviolet light stimulated hydrogen-line emission from the intergalactic medium. Although theory suggests that this radiation should be measurable, there are many uncertainties about the amplitude, angular structure, and frequency and redshift variation, of the signal. Progress in our understanding of the Epoch of Reionization (EoR) rests on detection and detailed study of this redshifted 21-cm line, and several experiments are planned or under way. This effort starts simple, with phased developments year by year, and is already deploying test elements sensitive in the 120-205 MHz range. An innovative correlator is under construction. The existing emphasis is on array calibration, wide-field imaging, and understanding how to achieve the stability needed for deep integrations. This continuation project will consolidate and expand, including deploying a larger array in Western Australia, where confounding radio frequency interference is minimal. Together, the northern and southern arrays will produce a catalog of the brightest sources at these frequencies in the entire sky, and prove key capabilities aimed at the future Precision Array to Probe the Epoch of Reionization (PAPER), investigating one of the most fascinating times in the Universe.This project both benefits from, and helps, related projects, including (but not limited to) the Frequency Agile Solar Radiotelescope, the Allen Telescope Array, and the California Array for Millimeter Astronomy. These are contributions to low frequency radio astronomy in general, as well as to solar physics and space weather. The study is also sharply focused around graduate student and postdoc involvement in instrumentation development. PAPER will also be a pioneer in launching a Radio Astronomy Park and radio quiet zone in a unique part of the globe.

这是一个协作项目，铅0607838/Backer，非领导0607759/Bradley。当由不断发展的宇宙结构的最密集区域形成时，其紫外线刺激了氢线从层间介质中刺激氢线发射。 尽管理论表明该辐射应该是可以测量的，但信号的振幅，角度结构以及频率以及红移变化存在许多不确定性。 我们对电离时代（EOR）时期的理解的进展取决于对这条红移21厘米线的检测和详细研究，并计划或正在进行一些实验。 这项工作开始简单，逐年分阶段开发，并且已经在120-205 MHz范围内部署了测试元素。 创新的相关器正在建设中。 现有的重点是阵列校准，宽视野成像，并了解如何实现深层整合所需的稳定性。 这个延续项目将巩固和扩展，包括在西澳大利亚州部署一个较大的阵列，在西澳大利亚，令人困惑的射频干扰最少。 Together, the northern and southern arrays will produce a catalog of the brightest sources at these frequencies in the entire sky, and prove key capabilities aimed at the future Precision Array to Probe the Epoch of Reionization (PAPER), investigating one of the most fascinating times in the Universe.This project both benefits from, and helps, related projects, including (but not limited to) the Frequency Agile Solar Radiotelescope, the Allen Telescope阵列和毫米天文学的加利福尼亚阵列。 这些都是对低频射电天文学的贡献，也是太阳能物理和太空天气的贡献。 这项研究还围绕研究生和博士后参与仪器开发。 纸也将是在全球独特部分推出射电天文学公园和广播静态区域的先驱。