Galaxy Evolution from a Microjansky Radio Survey

  • José Afonso
  • Bahram Mobasher
  • Andrew Hopkins
  • Antonis Georgakakis
  • Lawrence Cram
  • Ben Chan


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.


radio continuum galaxies galaxies evolution galaxies starburst 


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Copyright information

© Springer Science+Business Media Dordrecht 2003

Authors and Affiliations

  • José Afonso
    • 1
  • Bahram Mobasher
    • 2
  • Andrew Hopkins
    • 3
  • Antonis Georgakakis
    • 4
  • Lawrence Cram
    • 5
  • Ben Chan
    • 5
  1. 1.Observatório Astronómico de Lisboa, Tapada da AjudaLisboaPortugal
  2. 2.STScIBaltimoreUSA
  3. 3.Department of Physics and AstronomyUniversity of PittsburghPittsburghUSA
  4. 4.National Athens ObservatoryInstitute of Astronomy & AstrophysicsAthensGreece
  5. 5.School of Physics, University of SydneySydneyAustralia

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