Multifrequency studies of seven 3CR radio sources. II - Results and interpretation

Astronomy and Astrophysics – Astronomy

Scientific paper

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Astronomical Maps, Extragalactic Radio Sources, Radio Astronomy, Astronomical Models, Electron Density (Concentration), Faraday Effect, Magnetic Field Configurations, Microwave Emission, Monte Carlo Method, Polarization (Waves)

Scientific paper

A detailed study of the double extragalactic radio sources 3C 47, 3C 79, 3C 219, 3C 234, 3C 300, 3C 382, and 3C 430 is presented. The study is based on maps at 2.7 and 15 GHz from the 5-km telescope and at 1.4 GHz from the One-Mile telescope. Systematic comparisons between polarization and total-intensity maps at two frequencies have provided distributions of rotation measure and depolarization across each source, which led to estimates of the thermal electron densities and magnetic field configurations within the components. In addition, a knowledge of the spectral variations across each source permits the dynamics of the relativistic electrons to be investigated. The spectral, polarization, and morphological information is consistent with a continuous-flow model for double radio sources.

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