The UV background photoionization rate at 2.3 < z < 4.6 as measured from the Sloan Digital Sky Survey

Details The UV background photoionization rate at 2.3 < z < 4.6 as measured from the Sloan Digital Sky Survey The UV background photoionization rate at 2.3 < z < 4.6 as measured from the Sloan Digital Sky Survey

2009-06-08

arxiv.org/abs/0906.1484v1

Astronomy and Astrophysics

Astrophysics

Cosmology and Extragalactic Astrophysics

14 pages, 14 figures, submitted to the Astrophysical Journal

Scientific paper

(Abridged) We present the results from the largest investigation to date of the proximity effect in the HI Lyalpha forest, using the fifth SDSS data release. The sample consists of 1733 QSOs at redshifts z>2.3 and S/N>10. We adopted the flux statistic to infer the evolution of the HI effective optical depth in the Lyalpha forest between 23.

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