Circular Polarimetry of Extragalactic Radio Sources

Details Circular Polarimetry of Extragalactic Radio Sources Circular Polarimetry of Extragalactic Radio Sources

2009-01-29

arxiv.org/abs/0901.4678v1

Astronomy and Astrophysics

Astrophysics

Instrumentation and Methods for Astrophysics

5 pages, Proceeding of "Astronomical Polarimetry 2008: Science from Small to Large Telescope"

Scientific paper

We report multi-frequency circular polarization measurements for the four extragalactic radio sources 0056-00, 0716+71, 3C138 and 3C161 taken at the Effelsberg 100-m radiotelescope. The data reduction is based on a new calibration procedure that allows the contemporary measurement of the four Stokes parameters at different frequencies with single-dish radiotelescopes. We are in the process of framing the observed full Stokes spectra within a theoretical model that explains that the level of measured circular polarization as Faraday conversion.

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