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SKA Deep Polarization and Cosmic Magnetism

2015/01/10 by A. R. Taylor, Ivan Agudo, Taylor, A. R. +33
Physics and Astronomy · #Astrophysics and Cosmic Phenomena #Astrophysics of Galaxies (astro-ph.GA) #FOS: Physical sciences #Radio Astronomy Observations and Technology #Scientific Research and Discoveries #astro-ph.GA

paper · pdf · doi:10.48550/arxiv.1501.02298

9 pages, 3 figures; to appear as part of 'Cosmic Magnetism' in Proceedings 'Advancing Astrophysics with the SKA (AASKA14)', PoS(AASKA14)113

arxiv created 2015/01/10 · openalex publication_date 2015/01/10 · arxiv updated 2015/01/13 · openalex created_date 2025/10/10 · openalex updated_date 2026/07/28

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.

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