Exploring the ionization state of the intergalactic medium with Lyman-α absorption
Within the redshift range 2 ≤ <i>z</i> ≤ 4, a substantial contribution to the UV background at 1 Ryd from galaxies is required. Quasars dominate the ionizing photon emission at 4 Ryd. A significant contribution to the UV background at 4 Ryd by thermal emission from hot gas in galaxies an...
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University of Cambridge
2006
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| Online Access: | http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.596749 |