SKA deep polarization and cosmic magnetism

A. R. Taylor, Ivan Agudo, Takuya Akahori, Rainer Beck, Bryan Gaensler, George Heald, Johnston Hollitt Melanie, Mathieu Langer, Lawrence Rudnick, Dongsu Ryu, Anna Scaife, Dominik Schleicher, Jeroen Stil

Research output: Contribution to journalConference articlepeer-review

Abstract

Deep surveys with the SKA1-MID array offer for the first time the opportunity to systematically explore the polarization properties of the microJy source population. Our knowledge of the polarized sky approaching these levels is still very limited. In total intensity the population will be dominated by star-forming and normal galaxies to intermediate redshifts (z ∼ 1-2), and low-luminosity AGN to high redshift. The polarized emission from these objects is a powerful probe of their intrinsic magnetic fields and of their magnetic environments. For redshift of order 1 and above the broad bandwidth of the mid-bands span the Faraday thick and thin regimes allowing study of the intrinsic polarization properties of these objects as well as depolarization from embedded and foreground plasmas. The deep field polarization images will provide Rotation Measures data with very high solid angle density allowing a sensitive statistical analysis of the angular variation of RM on critical arc-minute scales from a magnetic component of Large Scale Structure of the Universe.

Original languageEnglish (US)
Article number113
JournalProceedings of Science
Volume9-13-June-2014
StatePublished - 2014
EventAdvancing Astrophysics with the Square Kilometre Array, AASKA 2014 - Giardini Naxos, Italy
Duration: Jun 9 2014Jun 13 2014

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