Galaxies in the first billion years: implications for re-ionization and the star formation history at z>6

Details Galaxies in the first billion years: implications for re-ionization and the star formation history at z>6 Galaxies in the first billion years: implications for re-ionization and the star formation history at z>6

Aug 2007

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2007hia....14..248b&link_type=abstract

Highlights of Astronomy, Volume 14, p. 248-248

Astronomy and Astrophysics

Astronomy

Galaxies: High-Redshift, Evolution, Formation, Stellar Content

Scientific paper

We discuss the selection of star-forming galaxies at z6 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 z6, and might have played a key role in re-ionizing the universe.

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