AI帮你理解科学
A Large Neutral Fraction Of Cosmic Hydrogen A Billion Years After The Big Bang
NATURE, no. 6977 (2004): 815-817
WOS NATURE
摘要
The fraction of ionized hydrogen left over from the Big Bang provides evidence for the time of formation of the first stars and quasar black holes in the early Universe; such objects provide the high-energy photons necessary to ionize hydrogen. Spectra of the two most distant known quasars(1) show nearly complete absorption of photons wit...更多
代码:
数据:
标签
评论
数据免责声明
页面数据均来自互联网公开来源、合作出版商和通过AI技术自动分析结果,我们不对页面数据的有效性、准确性、正确性、可靠性、完整性和及时性做出任何承诺和保证。若有疑问,可以通过电子邮件方式联系我们:report@aminer.cn