Polarization and magnetic fields of active galactic nuclei

Active galactic nuclei (AGN) are distant galaxies hosting a supermassive black hole in the center. In some of these objects, relativistic plasma jets form due to magnetic fields extracting energy from the black hole or accretion disk. The magnetic field structure or the formation of these jets is not yet well-understood. In this work, polarimetric radio observations are used to study the magnetic field strength and order in AGN jets. Additionally, polarization is used as a probe for locating the gamma-ray emission site, which cannot be resolved with any current instruments.