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Cosmic magnetism with the Square Kilometre Array and its pathfinders

Published online by Cambridge University Press:  01 November 2008

Bryan M. Gaensler
Bryan M. Gaensler*
Affiliation:
Sydney Institute for Astronomy (SIfA), School of Physics, The University of Sydney, NSW 2006, Australia email: bgaensler@usyd.edu.au
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Abstract

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One of the five key science projects for the Square Kilometre Array (SKA) is “The Origin and Evolution of Cosmic Magnetism”, in which radio polarimetry will be used to reveal what cosmic magnets look like and what role they have played in the evolving Universe. Many of the SKA prototypes now being built are also targeting magnetic fields and polarimetry as key science areas. Here I review the prospects for innovative new polarimetry and Faraday rotation experiments with forthcoming facilities such as ASKAP, LOFAR, the ATA, the EVLA, and ultimately the SKA. Sensitive wide-field polarisation surveys with these telescopes will provide a dramatic new view of magnetic fields in the Milky Way, in nearby galaxies and clusters, and in the high-redshift Universe.

Keywords

Galaxies: magnetic fields – instrumentation: interferometers – polarimeters – intergalactic medium – ISM: magnetic fields – magnetic fields – radio continuum: general – techniques: polarimetric

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