Large Scale Intensity Mapping of Neutral Hydrogen in the Universe with the Tianlai Pathfinders

该计划将为位于中国西部射电安静区的天来实验目前和即将到来的宇宙氢21厘米强度图数据开发新的分析方法。这种图谱为早期宇宙中气体和星系的演化提供了重要线索。更广泛的影响包括对本科生和博士后的培训，以及通过NSF/DOE QuarkNet计划使用新的软件定义无线电技术在费米拉实验室和威斯康星州麦迪逊大学开发廉价的射电望远镜。该实验将通过遥远星系的氢发射来测量宇宙的三维大尺度结构。主要目标是开发处理大前景信号的方法，此前已在NSF的绿岸望远镜上进行的21厘米探路器计划中对其进行了量化。

This program will develop new analysis methods for current and upcoming cosmological hydrogen 21cm intensity mapping data from the Tianlai experiment, located in a radio quiet area of Western China. Such mapping provides important clues to the evolution of gas and galaxies in the early universe. Broader impacts include training of undergraduate students and postdocs, and development of inexpensive radio telescopes at Fermilab and UW-Madison using new software-defined-radio techniques for use by high-school and college students, through the NSF/DOE QuarkNet program.The experiment will measure the three dimensional large scale structure of the universe via hydrogen emission from distant galaxies. The primary goal is to develop ways to handle the large foreground signal, which has been previously quantified in a path-finder 21cm program conducted on NSF's Green Bank Telescope.