Galaxy evolution from a microJansky radio survey |
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| Authors: | J Afonso B Mobasher A Hopkins A Georgakakis L Cram B Chan |
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| Institution: | (1) Observatório Astronómico de Lisboa, Tapada da Ajuda, 1349-018 Lisboa, Portugal;(2) STScI, 3700 San Martin Drive, Baltimore, MD 21218, USA;(3) Department of Physics and Astronomy, University of Pittsburgh, 3941 O'Hara Street, Pittsburgh, PA 15260, USA;(4) National Athens Observatory, Institute of Astronomy & Astrophysics, I.Metaxa & Vas.Pavlou str., Athens, 15236, Greece;(5) School of Physics, University of Sydney, Sydney, NSW, 2006, Australia |
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| Abstract: | 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 60μJy, this homogeneous survey, complemented with multiwavelength (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.
This revised version was published online in July 2006 with corrections to the Cover Date. |
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| Keywords: | radio continuum: galaxies galaxies: evolution galaxies: starburst |
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