Published in
Proceedings of Advancing Astrophysics with the Square Kilometre Array — PoS(AASKA14)
DOI: 10.22323/1.215.0103
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Broadband Polarimetry with the Square Kilometre Array: A Unique Astrophysical Probe
,
Iván Agudo,
Takuya Akahori,
Julie Banfield,
Rainer Beck,
Ettore Carretti,
Jamie Farnes,
Marijke Haverkorn,
George Heald,
David Jones,
Thomas Landecker,
Sui Ann Mao,
Ray P. Norris,
Shane O'Sullivan,
Lawrence Rudnick
and other authors.
Abstract
Faraday rotation of polarised background sources is a unique probe of astrophysical magnetic fields in a diverse range of foreground objects. However, to understand the properties of the polarised sources themselves and of depolarising phenomena along the line of sight, we need to complement Faraday rotation data with polarisation observations over very broad bandwidths. Just as it is impossible to properly image a complex source with limited u-v coverage, we can only meaningfully understand the magneto-ionic properties of polarised sources if we have excellent coverage in $λ^2$-space. We here propose a set of broadband polarisation surveys with the Square Kilometre Array, which will provide a singular set of scientific insights on the ways in which galaxies and their environments have evolved over cosmic time. ; Comment: 13 pages, 2 figures; to appear as part of 'Cosmic Magnetism' in Proceedings 'Advancing Astrophysics with the SKA (AASKA14)', PoS(AASKA14)