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Session 12 - Radio Galaxies, VLBI.
Display session, Monday, January 15
North Banquet Hall, Convention Center

[12.10] Total Intensity and Polarization Imaging of the Hotspot of 3C205 at 20 Parsec Resolution

C. J. Lonsdale (MIT Haystack Obs.), P. D. Barthel (U. Groningen, Netherlands)

Total intensity and linear polarization images of a compact hotspot in one of the outer lobes of the high-redshift quasar 3C205, produced using the newly completed VLBA at a wavelength of 18cm, are presented. The images reveal a complex curved structure with polarization percentages frequently as high as 70%. Strict upper limits are placed on the magnitude of any Faraday effects within the source or in the surrounding material. The favored interpretation of the structure is in terms of a deflection of the incoming jet by a density gradient in the external medium. Model-dependent estimates are made of several physical parameters in the interaction, and deductions are made concerning the likely orientation and Doppler factor of the flow in the deflected jet.

Program listing for Monday