The Dark Age of the universe

被引:131
作者
Miralda-Escudé, J
机构
[1] Ohio State Univ, Dept Astron, Columbus, OH 43210 USA
[2] Inst Adv Study, Princeton, NJ 08540 USA
[3] Inst Estudis Espacials Catalunya, ICREA, Barcelona, Spain
关键词
D O I
10.1126/science.1085325
中图分类号
O [数理科学和化学]; P [天文学、地球科学]; Q [生物科学]; N [自然科学总论];
学科分类号
07 ; 0710 ; 09 ;
摘要
The Dark Age is the period between the time when the cosmic microwave background was emitted and the time when the evolution of structure in the universe led to the gravitational collapse of objects, in which the first stars were formed. The period of reionization started with the ionizing light from the first stars, and it ended when all the atoms in the intergalactic medium had been reionized. The most distant sources of light known at present are galaxies and quasars at redshift z congruent to 6, and their spectra indicate that the end of reionization was occurring just at that time. The Cold Dark Matter theory for structure formation predicts that the first sources formed much earlier.
引用
收藏
页码:1904 / 1909
页数:6
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