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Milliarcsecond Polarization Properties of Several BL Lacertae Objects

Published online by Cambridge University Press:  03 August 2017

D. C. Gabuzda ,
D. H. Roberts ,
J. F. C. Wardle  and
L. F. Brown
D. C. Gabuzda
Affiliation:
Department of Physics, Brandeis University, Waltham, MA 02254 USA
D. H. Roberts
Affiliation:
Department of Physics, Brandeis University, Waltham, MA 02254 USA
J. F. C. Wardle
Affiliation:
Department of Physics, Brandeis University, Waltham, MA 02254 USA
L. F. Brown
Affiliation:
Department of Physics, Brandeis University, Waltham, MA 02254 USA

Abstract

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We discuss the λ6 cm total intensity and polarization structures of a number of BL Lacertae objects at milliarcsecond resolution. 0235+164 was unresolved and weakly polarized at each of two epochs a year apart; each of the other objects displays structure in polarized flux. 0735+178 and 1749+096 can be adequately modeled by two or three point components—a “core” plus one or two “knots.” The core components were moderately polarized (≃ 5%), while “knots” may be polarized at 8% or more, consistent with these components being optically thin. Preliminary results for BL Lac indicate that the total intensity structure can be modeled well by a set of four gaussian components; the polarization structure is complex, but is dominated by the northernmost knot in the jet.

Type
Extragalactic
Information
Symposium - International Astronomical Union , Volume 129: The Impact of VLBI on Astrophysics and Geophysics , 1988 , pp. 167 - 168
Copyright
Copyright © Reidel 1988 

References

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