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Title:
Galaxies in the First Billion Years: Implications for Reionization and the Star Formation History at z>6
Authors:
Bunker, A. J.; Eyles, L. P.; Chiu, K.; Stanway, E. R.; Ellis, R. S.; Stark, D. P.; McMahon, R. G.; Lacy, M.
Publication:
Cosmic Frontiers ASP Conference Series, Vol. 379, proceedings of the conference held 31 July-4 August 2006 at Durham University, Durham, UK. Edited by Nigel Metcalfe and Tom Shanks., p.280
Publication Date:
12/2007
Origin:
ASP
Bibliographic Code:
2007ASPC..379..280B

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 (˜ 10^{10} M_{ȯ}) 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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