Was the Universe neutral beyond redshift six?

Details Was the Universe neutral beyond redshift six? Was the Universe neutral beyond redshift six?

2008-01-30

arxiv.org/abs/0801.4674v2

Nuovo Cim.B122:977-983,2007

Astronomy and Astrophysics

Astrophysics

6 pages, 3 figures; to appear in the Proceedings `A Century of Cosmology', San Servolo (Venezia, Italy), August 2007, to be pu

Scientific paper

10.1393/ncb/i2008-10456-3

We provide measurements of the neutral hydrogen fraction xHI at z~6, by comparing semi-analytical models of the Lyalpha forest with observations of high-z quasars and Gamma Ray Bursts absorption spectra. We analyze the transmitted flux in a sample of 17 QSOs spectra at 5.74

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