Publications of the Astronomical Society of Australia

Research Article

EMU: Evolutionary Map of the Universe

Ray P. Norrisa1 c1, A. M. Hopkinsa2a35, J. Afonsoa3, S. Browna1, J. J. Condona4, L. Dunnea5, I. Feaina1, R. Hollowa1, M. Jarvisa1a37, M. Johnston-Hollitta7, E. Lenca1, E. Middelberga8, P. Padovania9, I. Prandonia10, L. Rudnicka11, N. Seymoura12, G. Umanaa13, H. Andernacha14, D. M. Alexandera21, P. N. Appletona15, D. Bacona16, J. Banfielda1, W. Beckera17, M. J. I. Browna18, P. Ciliegia19, C. Jacksona1, S. Ealesa20, A. C. Edgea21, B. M. Gaenslera22a35, G. Giovanninia10, C. A. Halesa1a22, P. Hancocka22a35, M. T. Huynha23, E. Ibara24, R. J. Ivisona24a25, R. Kennicutta26, Amy E. Kimballa4, A. M. Koekemoera27, B. S. Koribalskia1, Á. R. López-Sáncheza2a36, M. Y. Maoa1a2a28, T. Murphya22a35, H. Messiasa3, K. A. Pimbbleta18, A. Raccanellia16, K. E. Randalla1a22, T. H. Reipricha29, I. G. Rosebooma30, H. Röttgeringa31, D. J. Saikiaa32, R. G. Sharpa33, O. B. Sleea1, Ian Smaila21, M. A. Thompsona6, J. S. Urquharta1, J. V. Walla34 and G.-B. Zhaoa16

a1 CSIRO Astronomy & Space Science, Epping, NSW 1710, Australia

a2 Australian Astronomical Observatory, Epping, NSW 1710, Australia

a3 Centro de Astronomia e Astrofísica da Universidade de Lisboa, Observatório Astronómico de Lisboa, Tapada da Ajuda, 1349-018 Lisboa, Portugal

a4 National Radio Astronomy Observatory, Charlottesville, VA 22903, USA

a5 School of Physics & Astronomy, University of Nottingham, Nottingham, NG7 2RD, UK

a6 Centre for Astrophysics Research, University of Hertfordshire, Hatfield, Hertfordshire, AL10 9AB, UK

a7 School of Chemical & Physical Sciences, Victoria University of Wellington, Wellington 6140, New Zealand

a8 Astronomisches Institut, Ruhr-Universität Bochum, 44801 Bochum, Germany

a9 European Southern Observatory, D-85748 Garching bei München, Germany

a10 INAF-IRA, 40129 Bologna, Italy

a11 Department of Astronomy, University of Minnesota, Minneapolis, MN 55455, USA

a12 University College London, Mullard Space Science Laboratory, Dorking, Surrey, RH5 6NT, UK

a13 INAF-Catania Astrophysical Observatory, 95123 Catania, Italy

a14 Depto. de Astronomía, Universidad de Guanajuato, Guanajuato, C.P. 36000, GTO, Mexico

a15 NASA Herschel Science Center, Caltech, Pasadena, CA 91125, USA

a16 Institute of Cosmology and Gravitation, University of Portsmouth, Portsmouth, PO1 3FX, UK

a17 Max-Planck Institut für extraterr. Physik, 85741 Garching, Germany

a18 School of Physics, Monash University, Clayton, VIC 3800, Australia

a19 INAF – OABO, 40127 Bologna, Italy

a20 School of Physics and Astronomy, Cardiff University, Cardiff, CF24 3AA, UK

a21 Department of Physics, Durham University, Durham, DH1 3LE, UK

a22 Sydney Institute for Astronomy, School of Physics, The University of Sydney, NSW 2006, Australia

a23 International Centre for Radio Astronomy Research, University of WA, Crawley, WA 6009, Australia

a24 UK Astronomy Technology Centre, Royal Observatory, Edinburgh EH9 3HJ, UK

a25 Institute for Astronomy, University of Edinburgh, Edinburgh, EH9 3HJ, UK

a26 Institute of Astronomy, University of Cambridge, Cambridge, CB3 0HA, UK

a27 Space Telescope Science Institute, Baltimore MD 21218, USA

a28 School of Mathematics & Physics, University of Tasmania, Hobart, TAS 7001, Australia

a29 Argelander Institute for Astronomy, Bonn University, 53121 Bonn, Germany

a30 Dept of Physics and Astronomy, University of Sussex, Falmer, East Sussex, BN1 9RH, UK

a31 Leiden Observatory, Leiden University, 2300 RA Leiden, The Netherlands

a32 National Centre for Radio Astrophysics, TIFR, Pune 411 007, India

a33 Mount Stromlo Observatory, Canberra, ACT 2611, Australia

a34 Dept. of Physics and Astronomy, University of British Columbia, Vancouver, B.C. V6T 1Z1, Canada

a35 ARC Centre of Excellence for All-sky Astrophysics, University of Sydney, Sydney, NSW 2006, Australia

a36 Department of Physics and Astronomy, Macquarie University, North Ryde, NSW 2109, Australia

a37 Physics Department, University of the Western Cape, Cape Town 7535, South Africa


EMU is a wide-field radio continuum survey planned for the new Australian Square Kilometre Array Pathfinder (ASKAP) telescope. The primary goal of EMU is to make a deep (rms ∼ 10 μJy/beam) radio continuum survey of the entire Southern sky at 1.3 GHz, extending as far North as +30° declination, with a resolution of 10 arcsec. EMU is expected to detect and catalogue about 70 million galaxies, including typical star-forming galaxies up to z ∼ 1, powerful starbursts to even greater redshifts, and active galactic nuclei to the edge of the visible Universe. It will undoubtedly discover new classes of object. This paper defines the science goals and parameters of the survey, and describes the development of techniques necessary to maximise the science return from EMU.

(Received May 19 2011)

(Accepted June 15 2011)


  • telescopes;
  • surveys;
  • stars: activity;
  • galaxies: evolution;
  • galaxies: formation;
  • cosmology: observations;
  • radio continuum: general


c1 Corresponding author. Email: