Frequency dependence of the Parsec-scale polarization structures of BL Lac objects

Details Frequency dependence of the Parsec-scale polarization structures of BL Lac objects Frequency dependence of the Parsec-scale polarization structures of BL Lac objects

Jan 2001

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2001iaus..205..140p&link_type=abstract

Galaxies and their Constituents at the Highest Angular Resolutions, Proceedings of IAU Symposium #205, held 15-18 August 2000 at

Computer Science

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Scientific paper

We are currently analyzing multi-frequency (2+4+6 cm) VLBA polarization observations of all sources from the complete sample of 1-Jy BL Lac objects defined by H. Kuhr and G. Schmidt. Total intensity and linear polarization images for several of the most interesting sources are presented, together with rotation-measure and spectral-index maps. In most of the sources, the measured milliarcsecond-scale rotation measures are consistent with integrated values, but in a number of cases, there is clear evidence for non-uniformity in the distribution of thermal plasma on parsec scales. We discuss overall characteristics of the polarization properties of the sample and their frequency dependence.

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