Advances in Astronomy and Space Physics, Volume 1 (2011)

Circular polarization of AGNs on the parsec VLBI scales

V. M. Vitrishchak1, I. N. Pashchenko2, D. C. Gabuzda3

1Sternberg Astronomical Institute, Moscow State University, Universitetsky pr., 13, 119992, Moscow, Russia
2Astro Space Center of Lebedev Physical Institute of RAS, Profsoyuznaya st. 84/32, 117997, Moscow, Russia
3University College Cork, College Road, Cork, Ireland

Faraday effects possibly plays the major role in generation of circular polarization observed on Very Long Base Interferometry scales. Multi-frequency circular polarization measurementrs can become the desired breakthrough in understanding the active galactic nuclei jet physics and the only possibility to estimate some of their vital parameters. We review the possible mechanisms of circular polarization generation and their connection to the jet parameters. We throw a glimpse on the methods of data reduction and finally discuss our current observational progress and its possible interpretation.