SKA Deep Polarization and Cosmic Magnetism

“Active galactic nuclei are powered by supermassive black holes that accrete matter and are capable of forming pairs of relativistic jets that can extend up to distances far larger than the size of the host galaxy.”
“The fact that jets in AGN are formed from magnetic systems, and that the magnetic field participating in their formation is partially dragged all along the jets, make polarization observations of their synchrotron emission a powerful tool to test magneto-hydrodynamic and emission models.” (AGN = Active galactic nuclei).

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