Galaxy Evolution in the Hubble Deep Field North and South

Abstract.

We derive the redshifts of the galaxies in the HDFN and HDFS, using our own photometric redshift technique (a Basian method using empirical template spectra, Bender [1]). Our redshift estimates are in very good agreement with the spectroscopic redshifts. We compare the galaxy number densities N(z) of the HDFN and HDFS and calculate the luminosity densities at different wavelengths. The luminosity densities are in good agreement with CDM predictions for redshifts of z < 3. At higher redshifts these models underestimate the measured luminosity densities. From the luminosity density in the UV we derive the star formation rate (SFR) as a function of redshift. Our SFR(z) agrees well with other published results.