Astronomy and Astrophysics – Astronomy
Scientific paper
Jun 2008
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2008aspc..386..483a&link_type=abstract
Extragalactic Jets: Theory and Observation from Radio to Gamma Ray ASP Conference Series, Vol. 386, proceedings of the conferenc
Astronomy and Astrophysics
Astronomy
Scientific paper
The continua of highly active radio-loud AGN are dominated by synchrotron radiation over virtually the entire spectrum. Despite this fact, it has usually been thought that no correlation between optical and radio polarization should be observed, based on the idea that the synchrotron radiation at very different wavelengths is emitted at very different regions in the jet. However, a clear correlation between the Faraday-rotation-corrected VLBI core radio polarization angle and the nearly simultaneously measured optical polarization angle was found by te{Gabuzda06}, suggesting that the optical and compact radio polarizations are more closely related than had been thought. We have obtained new data in order to investigate this question. Our preliminary results show that, although the optical and radio core polarizations of BL Lac objects are usually aligned, the behaviour displayed by quasars is more complex, and some may involve additional phenomenology, such as internal Faraday rotation.
Algaba J. C.
Gabuzda Denise C.
Smith Paul S.
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