Virtual Journal of Nuclear Astrophysics

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JINA - Virtual Journal of Nuclear Astrophysics, 7 December 2012

Volume 10, Issue 49 (53 Articles)

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• # 23 - Extremely metal-poor gas at a redshift of 7
  • The spectrum of a quasar at redshift 7.04 reveals absorption from a large column of foreground neutral hydrogen with no corresponding heavy elements, this absorbing gas is either diffuse and intergalactic but has not yet been ionized by starlight at this early epoch, or it is gravitationally bound to a proto-galaxy that has a chemical abundance <1/10,000, the solar level.
  • Nature - Volume: 492, Issue: 7427
  • 10-148