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- Evolutionary Map of the Universe, or EMU, is a large project which will use the new ASKAP telescope to make a census of radio sources in the sky. EMU is expected to detect about 70 million radio sources.compared to the 2.5 million radio sources currently known, most of which were detected by the NRAO VLA Sky Survey.Most of these radio sources will be galaxies millions of light years away, many containing massive black holes, and some of the signals detected will have been sent less than half a billion years after the Big Bang, which created the universe 13.7 billion years ago. Unlike the NVSS, which mainly detected active galactic nuclei, the greater sensitivity of EMU means that about half the galaxies detected will be star-forming galaxies. EMU's primary science driver is to try to understand how the stars and galaxies were first formed, and how they evolved to their present state. The census of 70 million galaxies detected by EMU will represent galaxies in all their different stages of evolution, so that they can be placed in sequence, enabling the study of how their properties change as they evolve. EMU will be able to probe star forming galaxies up to a redshift of about 1, active galactic nuclei to the edge of the observable universe, and will undoubtedly uncover new classes of object. EMU was chosen (with WALLABY) as one of the two highest-ranked proposals for ASKAP from an initial field of 39 expressions of interest. EMU is an international project, and the EMU team consists of over 400 astronomers in 21 countries. In addition to planning and conducting the radio survey itself, the EMU project also includes
* Key Science Projects, which will deliver the key science goals from EMU. These include Galaxy Evolution, Cosmology, Galaxy Clusters, the Galactic Plane, and Radio Stars.
* Development Projects, which are developing and optimising the tools needed to generate the science from the EMU data. These include source extraction, cross-identification with multi-wavelength catalogues, and redshift determination. One such development project has resulted in the creation of the Radio Galaxy Zoo citizen science project.
* Collaboration Projects, which develop and maintain collaborations with other large survey projects such as Meerkat-Mightee, MWA-GLEAM, LOFAR, SkyMapper, WISE, and eRosita.
* The WTF project, which will mine the EMU data for unexpected discoveries that are not included in the science goals. (en)
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| rdfs:comment
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- Evolutionary Map of the Universe, or EMU, is a large project which will use the new ASKAP telescope to make a census of radio sources in the sky. EMU is expected to detect about 70 million radio sources.compared to the 2.5 million radio sources currently known, most of which were detected by the NRAO VLA Sky Survey.Most of these radio sources will be galaxies millions of light years away, many containing massive black holes, and some of the signals detected will have been sent less than half a billion years after the Big Bang, which created the universe 13.7 billion years ago. Unlike the NVSS, which mainly detected active galactic nuclei, the greater sensitivity of EMU means that about half the galaxies detected will be star-forming galaxies. (en)
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