Lyα photons from the first radiating sources in the universe play a pivotal role in 21 cm radio detections of Cosmic Dawn and the Epoch of Reionization. Comments are provided on the effect of the hyperfine structure of hydrogen on the rate of heating or cooling of the Intergalactic Medium by Lyα photons.

中文翻译：

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Lyα 光子的星系际加热，包括超精细结构校正

来自宇宙中第一个辐射源的Ly α光子在 21 厘米射电探测宇宙黎明和再电离纪元中发挥着关键作用。提供了关于氢的超精细结构对 Ly α光子加热或冷却星系际介质的影响的评论。