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Galaxies in the first billion years: implications for re-ionization and the star formation history at z>6
Published online by Cambridge University Press: 01 August 2006
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 (>200Myr) 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 re-ionizing the universe.
- Type
- Contributed Papers
- Information
- Proceedings of the International Astronomical Union , Volume 2 , Highlights of Astronomy 14: Highlights of Astronomy , August 2006 , pp. 248
- Copyright
- Copyright © International Astronomical Union 2007