Spectropolarimetric Observations of Active Galactic Nuclei with the 6-m BTA Telescope

TL;DR

This study uses spectropolarimetric data from the 6-m BTA telescope to analyze AGNs, revealing magnetic field properties and plasma parameters in accretion disks through polarization and Faraday rotation analysis.

Contribution

It introduces a method to determine magnetic field strength and plasma parameters in AGN accretion disks using spectropolarimetric observations and Faraday rotation effects.

Findings

Magnetic field strength in accretion disks estimated.

Physical parameters of accreting plasma derived.

Polarization wavelength dependence analyzed.

Abstract

We present the results of our spectropolarimetric observations for a number of active galactic nuclei (AGNs) carried out at the 6-m telescope with the SCORPIO focal reducer. The derived wavelength dependences of the polarization have been analyzed by taking into account the Faraday rotation of the polarization plane on the photon mean free path in a magnetized accretion disk. As a result, based on traditional accretion disk models, we have determined the magnetic field strength and distribution and a number of physical parameters of the accreting plasma in the region where the optical radiation is generated.