Physics
Scientific paper
Oct 2010
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2010aspc..427..183a&link_type=abstract
Accretion and Ejection in AGN: a Global View. Proceedings of a conference held June 22-26, 2009 in Como, Italy. Edited by Laura
Physics
Scientific paper
After correction for Faraday rotation, most BL Lac objects have aligned VLBA-core and optical polarization angles (Gabuzda et al. 2006). However, this may not be the case for quasars (Algaba et al. 2008). We present initial results of our new 12+15+22+24 +43GHz VLBA polarization observations, exploring the possibility that some or all quasars have high core Faraday rotations, which led to nπ ambiguities in earlier analyses. Our results suggest that core Faraday rotations of the order of tens of thousands of rad/m2 may be fairly common for quasars on the scales probed by these observations. We are also pursuing a joint analysis of our VLBA and simultaneous optical polarization data, continuing our quest for radio-optical correlations.
Algaba J. C.
Gabuzda Denise C.
Smith Paul S.
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