Magnetic fields of active galactic nuclei and quasars: Redshift dependence
Type: Journal, Article Title: Magnetic fields of active galactic nuclei and quasars: Redshift dependence Author(s): Gnedin, Y. N.; Silant'ev, N. A. Date: 2002/07 Abstract: The observed reduction in the fraction of quasars with polarized radiation as the redshift increases is explained by an increase in the magnetic-field strength in accretion disks at high z. The emerging Faraday rotation causes the radiation to be depolarized. This mechanism allows the magnetic fields in accretion disks to be estimated at several hundred gauss. We give simple asymptotic formulas that describe the Faraday depolarization in optically thick accretion disks. Publisher: Nauka/Interperiodica Journal (full): Astronomy Letters Volume: 28 Issue: 7 Start Page: 438 End Page: 442 Link: http://link.springer.com/article/10.1134/1.1491966 Link (PDF): http://link.springer.com/content/pdf/10.1134%2F1.1491966.pdf