Galaxy Evolution from a Microjansky Radio Survey
A strong evolution of galaxies is observed for 0 < z < 1, as evidenced by an increase of almost an order of magnitude in the galaxy star-formation rate density. However, it is known that dust obscuration has affected our understanding of galaxy evolution over this significant fraction of the age of the Universe. In order to study galaxy evolution free from dust induced biases, an ultra deep radio survey - the Phoenix Deep Survey - was initiated. With a detection limit of 60 μJy, this homogeneous survey, complemented with multi wavelength (photometric and spectroscopic) observations, is being used to build a consistent picture of galaxy evolution. The ultra-deep radio source counts are presented, and interpreted using luminosity function evolutionary models. The discovery of extremely dusty galaxies from this survey, along with the clustering properties of the sub-mJy radio population, are also discussed.
Keywordsradio continuum galaxies galaxies evolution galaxies starburst
Unable to display preview. Download preview PDF.
- Hopkins, A., Afonso, J., Chan, B., Cram, L., Georgakakis, A. and Mobasher, B.: 2003, AJ, in press.Google Scholar