Name of the Speaker(s): Denise C. Gabuzda
Institution: Astro Space Center, Moscow
Title of the communication: The Parsec-scale Magnetic Field Structures of Blazars.
Preliminary abstract (12 lines max.):
VLBI polarization observations have shown that the characteristic magnetic field structures for different types of blazars -- BL Lacertae objects and quasars, for example -- are systematically different. This suggests that some fundamental physical parameters for the jets -- and quite possibly for the central accretion -- in these sources are considerably different. New VLBI polarization images for sources from a complete sample of BL Lacertae objects and images for intraday variable blazars will be presented and discussed in the context of qualitative models offering a connection between the optical and compact radio properties of blazars with prominent and weak emission lines.