Other
Scientific paper
Jan 2010
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2010aas...21547013g&link_type=abstract
American Astronomical Society, AAS Meeting #215, #470.13; Bulletin of the American Astronomical Society, Vol. 42, p.515
Other
6
Scientific paper
The Australian Square Kilometre Array Pathfinder (ASKAP) is a next-generation radio telescope currently under construction in Western Australia. ASKAP will consist of an array of 36 12-meter antennas, each equipped with a phased-array feed. ASKAP's large instantaneous field-of-view will allow us to survey the whole sky much faster than is possible with existing radio telescopes, and its combination of survey speed and sensitivity will allow astronomers to explore the radio sky in novel ways. After an open international competitive process, ten major surveys have been selected to proceed to a design study phase. At least 75% of ASKAP observing time in the first five years of operation (starting in 2013) will be devoted to pursuing such surveys.
Here we present POSSUM, the Polarization Sky Survey of the Universe's Magnetism (POSSUM), which is one of the surveys now beginning a design study. In POSSUM, we propose to use ASKAP's unique survey capabilities to measure the Faraday rotation of three million extragalactic radio sources over 30,000 square degrees, thereby dramatically improve our understanding of astrophysical magnetism. The resulting data-set will revolutionise our understanding of the ordered and turbulent components of the Milky Way's magnetic field, can test dynamo and other models for magnetic field generation in galaxies and clusters, and can carry out a comprehensive census of magnetic fields as a function of redshift in galaxies, active galactic nuclei, galaxy clusters and the overall intergalactic medium.
Gaensler Bryan M.
Landecker Thomas L.
Possum Collaboration
Taylor Russ A.
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