Magnetic field structures in active compact radio sources

Details Magnetic field structures in active compact radio sources Magnetic field structures in active compact radio sources

Mar 1985

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1985apj...290..627j&link_type=abstract

Astrophysical Journal, Part 1 (ISSN 0004-637X), vol. 290, March 15, 1985, p. 627-636.

Astronomy and Astrophysics

Astrophysics

72

Extragalactic Radio Sources, Interstellar Magnetic Fields, Magnetic Field Configurations, Polarimetry, Anisotropic Media, Random Walk, Time Dependence, Wavelengths

Scientific paper

The analysis of simultaneous multifrequency linear polarimetry data between 1.4 GHz and 90 GHz for about 20 active, compact radio sources at six epochs from 1977 December 10 1980 July is presented. In addition, monthly 8 Ghz polarization data on the same sources were examined. The general polarization characteristics of these sources can be well described in terms of magnetic fields which are largely turbulent and slightly anisotropic. The magnetic field symmetry axes are generally aligned with the source structural axes on the milli-arcsecond scale (OJ 287 is a notable exception.) Monte Carlo calculations indicate that observed polarization variations and in particular 'rotator' polarization events can be produced in this model as a consequence of 'random walks' generated through evolution of the turbulent magnetic field.

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