Searches for galaxies at z > 4 through Lyman-limit imaging

Abstract

We present preliminary results of a search for galaxies at z>4 through Lyman-limit imaging of the fields of known high-redshift radio-galaxies. Objects were selected by means of their broad-band colours, and spectroscopy of candidate objects in one of the fields has been performed through multi-slit spectroscopy at the 4.2m William Herschel Telescope. These spectra show some of the first z>4 galaxies to be identified using the Lyman break technique.

4 pages, LaTeX, requires paspconf.sty (included). To appear in Proceedings of "The Young Universe", Rome Observatory, Sep 29 - Oct 3 1997