We review the properties of z>5 galaxies studied with HST and with the Keck telescopes, and discuss the detectability of Lyman alpha 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 (lambda_{eff} ~ 9200 Ang), 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.
@article{arxiv.astro-ph/9911477,
title = {Galaxies at z>5: The View from Hawaii},
author = {Esther M. Hu and Lennox L. Cowie and Richard G. McMahon},
journal= {arXiv preprint arXiv:astro-ph/9911477},
year = {2007}
}
Comments
12 pages, 7 encapsulated PostScript figures, paspconf.sty. Invited review, to appear in "The Hy-Redshift Universe: Galaxy Formation and Evolution at High Redshift" held in Berkeley, June 21-24, 1999, eds. A.J. Bunker and W.J.M. van Breugel, A.S.P. Conf.Ser. in press (1999)