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Paper: Galaxies in the First Billion Years: Implications for Reionization and the Star Formation History at z > 6
Volume: 379, Cosmic Frontiers
Page: 280
Authors: Bunker, A.J.; Eyles, L.P.; Chiu, K.; Stanway, E.R.; Ellis, R.S.; Stark, D.P.; McMahon, R.G.; Lacy, M.
Abstract: We discuss the selection of star-forming galaxies at z ~ 6 through the Lyman-break technique. Spitzer imaging implies many of these contain older stellar populations (> 200 Myr) which produce detectable Balmer breaks. The ages and stellar masses (~ 1010M) imply that the star formation rate density at earlier epochs may have been significantly higher than at z ~ 6, and might have played a key role in reionizing the Universe.
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