【摘要】：正大爆炸后的38萬年,宇宙從輻射為主轉(zhuǎn)為進(jìn)入以物質(zhì)為主的時代.自由電子被質(zhì)子俘獲,形成中性氫原子,使得空間對電磁輻射變得透明.從此,直到大約3億年后,空間幾乎沒有發(fā)光的恒星,以致于這期間被稱為黑暗時代.按照現(xiàn)代天文學(xué)界的認(rèn)識,在紅移z=6—11的距離范圍內(nèi),伴隨著第一批恒星的形成,星際間的介質(zhì)發(fā)生重新電離.最近,來自美國霍普金斯大學(xué)物理-天文系的Zheng等,在Nature周刊上撰文,報告
[Abstract]:380000 years after the Big Bang, the universe changed from radiation to material. Free electrons are captured by protons to form neutral hydrogen atoms, making space transparent to electromagnetic radiation. From then on, until about 300 million years later, there were few luminous stars in space, so that this period was called the Dark Age. According to the understanding of modern astronomy, the interstellar medium is reionized with the formation of the first stars in the range of red shift z 鈮，

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