Theoretical Studies of Fluctuations in the Redshifted 21 cm Line

红移21厘米线波动的理论研究

• 批准号: 0506556
• 负责人: Matias Zaldarriaga
• 金额: $ 37.59万
• 依托单位: Harvard University
• 依托单位国家: 美国
• 项目类别: Continuing Grant
• 财政年份: 2005
• 资助国家: 美国
• 起止时间: 2005-07-15 至 2010-06-30
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=0506556&HistoricalAwards=false
• 关键词: Theoretical; Studies; Fluctuations; Redshifted; 21

AST-0506556ZaldarriagaObservations of fluctuations induced by absorption and emission from high redshift neutral hydrogen in its 21 cm transition have the potential to provide a new and extremely powerful probe of cosmology. This project will predict this signal, to understand better the power of this approach, to select the optimal angular scales and frequency ranges, to determine the best statistics to use, and to quantify the effects of foregrounds. Studying the primordial seeds should constrain the physics responsible for the generation of those perturbations, providing a window into the earliest evolution of the Universe (the epoch of inflation). This might also have important implications for fundamental physics. Analytic and numerical models of the epoch of reionization will both explore parameter space and calibrate against detailed physics.This work is vitally important to experiments to detect and measure redshifted 21 cm emission, motivating optimal design and observing strategies. Broad dissemination of results and the engagement of students from under-represented groups will spread the benefits of this research, training the next generation of scientists in this emerging area of cosmology.

高红移中性氢在其21厘米跃迁中吸收和发射引起的波动的观测有可能提供一种新的、极其强大的宇宙学探测。这个项目将预测这个信号，更好地理解这种方法的力量，选择最佳的角度尺度和频率范围，确定最好的统计数据，并量化前景的影响。对这些原始种子的研究将限制产生这些扰动的物理学，为宇宙最早的演化（暴胀时代）提供一个窗口。这可能对基础物理学也有重要的影响。再电离时代的解析和数值模型将探索参数空间并根据详细的物理进行校准。这项工作对21厘米红移辐射的检测和测量实验，激励优化设计和观测策略至关重要。结果的广泛传播和来自代表性不足群体的学生的参与将传播这项研究的好处，在这个新兴的宇宙学领域培养下一代科学家。