High-accuracy linear and circular polarization measurements at 21 CM

Details High-accuracy linear and circular polarization measurements at 21 CM High-accuracy linear and circular polarization measurements at 21 CM

Feb 1982

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1982mnras.198..747d&link_type=abstract

Monthly Notices of the Royal Astronomical Society, vol. 198, Feb. 1982, p. 747-755.

Astronomy and Astrophysics

Astronomy

11

Centimeter Waves, Circular Polarization, Linear Polarization, Polarimetry, Radio Sources (Astronomy), Accuracy, Equipartition Theorem, Magnetic Flux, Radiant Flux Density, Radio Telescopes, Synchrotron Radiation, Tables (Data)

Scientific paper

New high-accuracy linear and circular polarization measurements have been obtained for 27 small-diameter radio sources, using the Westerbork Synthesis Radio Telescope at 21 cm (1415 MHz). From these and other observed properties of the sources, estimates of the average internal magnetic field strengths in the sources are made by applying the uniform synchrotron emission model to the measured circular polarization and by using equipartition arguments. These two values are compared and found to be in agreement to within an order of magnitude, as was previously found by Weiler and de Pater (1980). Also, the magnetic fields estimated from circular polarization measurements at two different wavelengths (49 and 21 cm) are compared and found to be in rough agreement, but with indications of differences between variable and nonvariable sources. A comparison of the magnitudes of linear and circular polarization in sources shows no correlations.

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