ar X iv : a st ro - p h / 99 11 47 7 v 1 2 6 N ov 1 99 9 Galaxies at z > 5 : The View from Hawaii
نویسندگان
چکیده
We review the properties of z > 5 galaxies studied with HST and with the Keck telescopes, and discuss the detectability of Lyα emission-line galaxies out to z ∼ 6.5 based on these data and ongoing narrowband imaging surveys. The brightest sources may show (R − Z) color breaks, although the high sky background at Z (λeff ≈ 9200 Å), makes such observations challenging for typical faint sources. Keck LRIS observations of the z = 5 SDSS quasar and z > 5 galaxies observed with HST in the HDF show that the strength of the Lyman break is evolving more slowly than extrapolations from models at z ∼ 3 would predict.
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