Detecting Cosmic Reionization via Low-Frequency Interferometry

通过低频干涉测量宇宙再电离

• 批准号: 0901961
• 负责人: Aaron Parsons
• 金额: $ 24.9万
• 依托单位: Parsons Aaron R
• 依托单位国家: 美国
• 项目类别: Fellowship Award
• 财政年份: 2009
• 资助国家: 美国
• 起止时间: 2009-09-01 至 2011-08-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=0901961&HistoricalAwards=false
• 关键词: Detecting; Cosmic; Reionization; via; Low

This award is funded under the American Recovery and Reinvestment Act of 2009 (Public Law 111-5).Dr. Aaron Parsons is awarded an NSF Astronomy and Astrophysics Postdoctoral Fellowship to carry out a program of research and education at the University of California-Berkeley (UCB). The research centers on the design and implementation of the Precision Array for Probing the Epoch of Reionization (PAPER), a low-frequency interferometer that aims to detect the power spectrum of fluctuations in the brightness temperature of redshifted 21-cm emission in the 120-200 MHz band, corresponding to redshifts 11 z 6. Dr. Parsons will: (1) develop PAPER instrumentation, including correlator research within UCB's Center for Astronomy Signal Processing and Electronics Research (CASPER), enabling PAPER's expansion to 32-, 64-, and 128-antenna deployments over the next three years; (2) improve calibration and imaging of PAPER data as part of an open-source software toolkit for high dynamic-range imaging with low-frequency interferometers; and (3) characterize interfering astrophysical foregrounds, optimizing antenna configuration within the array for detecting the Epoch of Reionization signal relative to these foregrounds, and setting increasingly sensitive bounds on the 21-cm fluctuations from cosmic reionization.Dr. Parsons will also develop a cross-disciplinary undergraduate lab class focusing on the principles of radios, signal processing and wireless communications, and a public outreach exhibit using a broadband spectrometer to monitor radio interference as part of an effort to raise awareness of "dark sky" issues in radio astronomy.

该奖项是根据2009年《美国回收与再投资法》（公共法第111-5）.DR资助的。亚伦·帕森斯（Aaron Parsons）被授予NSF天文学和天体物理学博士后奖学金，以在加利福尼亚大学 - 伯克利分校（UCB）进行研究和教育计划。该研究集中于探测探测校正时期（纸）的精确阵列的综合研究，这是一种低频干涉仪，旨在检测在120-200 MHz带中红移21 cm发射的亮度温度下波动的功率谱，该纸条在120-200 MHz频段中进行了研究。天文学信号处理和电子研究（CASPER），使纸在未来三年内扩展到​​32、64和128-Antenna的部署； （2）作为用于高频干涉仪的高动态范围成像的开源软件工具包的一部分，改进纸质数据的校准和成像； （3）表征干扰天体物理前景，优化阵列内的天线构型，以检测相对于这些前景相对于这些前景的回离信号时代，并在从宇宙repionization中设定了越来越敏感的界限。帕森斯还将开发跨学科的本科实验室类，重点介绍无线电，信号处理和无线通信的原理，以及使用宽带光谱仪来监控无线电干扰的公开展览展览，这是提高无线电天文学中“黑暗天空”问题的努力的一部分。