Linear polarization at lambda 49 CM of 27 double radio sources

Astronomy and Astrophysics – Astrophysics

Scientific paper

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Depolarization, Electron Density Profiles, Linear Polarization, Quasars, Radio Galaxies, Faraday Effect, Statistical Correlation

Scientific paper

Using new observations of the λ49 cm polarization of 27 double radio sources, the authors have reevaluated the depolarization characteristics of a flux-limited sample of 46 classical double sources drawn from the 3CR catalogue. The electron density has been determined for 86 source components assuming that depolarization is due to internal Faraday rotation. The authors obtain values between 200 and 3000 m-3 with a frequency distribution which varies approximately as the inverse of electron density. In an investigation of "polarization-asymmetry" in component pairs, they find a slight positive correlation between the electron densities in the components of sources from their sample, but note that there are some sources in which the densities differ by up to an order of magnitude.

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