Detecting hydrogen in the early universe using the Large Aperture Experiment to Detect the Dark Age (LEDA) telescope

该计划的目标是测量起源于再电离时期（EoR）的氢（HI）21厘米波长发射信号，并红移到非常低的射频（约70 MHz）。 EoR是一个新的恒星和黑洞将宇宙从基本上中性转变为基本上电离的时期，是宇宙历史上尚未探索的最后前沿之一。更广泛的影响包括对研究生和博士后进行天文仪器方面的培训。 此外，他的团队将开发开源，在线，主动学习工具，使用新技术的笔记本电脑从云服务。这将使在浏览器窗口中执行的交互式混合文本和图形材料的呈现成为可能。 该技术可能适用于所有STEM领域。研究人员将使用他们自己的仪器--探测黑暗时代的大孔径实验（LEDA），试图探测EoR在红移接近20处的HI天空平均吸收光谱。LEDA是欧文斯谷长波阵列（Owens Valley Long Wavelength Array）大型仪器的一部分，该仪器位于加州中部的欧文斯谷射电天文台。

The goal of this program is to measure the signal of hydrogen (HI) 21cm wavelength emission originating during the Epoch of Reionization (EoR) and redshifted to very low radio frequencies (about 70 MHz). The EoR was a period when new stars and black holes transformed the universe from being largely neutral to being largely ionized, and is one of the last frontiers in the history of the universe yet to be explored. Broader impacts include training of graduate students and postdocs in astronomical instrumentation. In addition, he team will develop open-source, online, active-learning tools using the new technology of Jupyter notebooks served from the Cloud. This will enable presentation of interactive mixed text and graphical materials that execute in browser windows. The technology is potentially applicable to all STEM fields.The investigators will use their own instrument, the Large Aperture Experiment to Detect the Dark Age (LEDA), to attempt to detect the HI sky-averaged absorption spectrum from the EoR at redshifts near 20. LEDA is part of a larger instrument called the Owens Valley Long Wavelength Array, located at the Owens Valley Radio Observatory in central California.