The most distant radio galaxies

Abstract

The techniques and samples being employed to find radio galaxies at high redshifts are outlined. Results obtained from the study of high-redshift galaxies, as well as attempts to elucidate this phenomenon are discussed. Several radiooptical correlations have been revealed; these include the so-called alignment effect, which points to the importance of radio jets in triggering bursts of star formation. Apart from serving as important probes of the physical conditions in the universe at different epochs, studies of high-redshift galaxies could help determine if the bulk of galaxy formation occurred in a relatively short span of time at early epochs or whether the process was much more spread out in time, extending to relatively recent epochs