Kravchenko, Evgeniya

Parsec scale Faraday rotation measures in 20 AGN jets.

Author list: Evgeniya Kravchenko, Yuri Y. Kovalev, Kirill Sokolovsky

We present the parsec-scale Faraday rotation measure (RM) properties of 20 active galactic nuclei (AGN), observed with the VLBA simultaneously at nine frequencies from 1.4 to 15.4 GHz in the dual circular polarization mode. This sample represents sources with large apparent frequency-dependent core shifts and bright parsec-scale jets. We produced Faraday RM and Faraday-corrected linear polarization maps.

We discuss the fractional polarization properties and transversal Faraday RM gradients of these AGNs. Combined with the core shift measurements these data allowed us to reconstruct a 3D magnetic field geometry in AGN's radio cores.