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19 April 2024

» arxiv » astro-ph/0504437

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Constraints on the metagalactic hydrogen ionization rate from the Lyman-alpha forest opacity
James S. Bolton ; Martin G. Haehnelt ; Matteo Viel ; Volker Springel ;
Date:	20 Apr 2005
Subject:	astro-ph
Affiliation:	IoA), Martin G. Haehnelt (IoA), Matteo Viel (IoA), Volker Springel (MPA
Abstract:	Understanding the sources responsible for reionizing the Universe is a key goal of observational cosmology. A discrepancy has existed between the metagalactic hydrogen ionization rate, Gamma_HI, predicted by early hydrodynamical simulations of the Lyman-alpha forest if scaled to appropriate assumptions for the IGM temperature, when compared to values predicted from the proximity effect. We present new estimates for Gamma_HI in the redshift range 2
Source:	arXiv, astro-ph/0504437
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