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Polarization Variability of Some Compact Radio Sources

Published online by Cambridge University Press:  14 August 2015

M. M. Komesaroff ,
D. K. Milne ,
P. T. Rayner ,
J. A. Roberts  and
D. J. Cooke
M. M. Komesaroff
Affiliation:
Division of Radiophysics, CSIRO, Sydney, Australia
D. K. Milne
Affiliation:
Division of Radiophysics, CSIRO, Sydney, Australia
P. T. Rayner
Affiliation:
Division of Radiophysics, CSIRO, Sydney, Australia
J. A. Roberts
Affiliation:
Division of Radiophysics, CSIRO, Sydney, Australia
D. J. Cooke
Affiliation:
Division of Radiophysics, CSIRO, Sydney, Australia

Abstract

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Figure 1 shows observations for four sample sources from the Parkes 5 GHz polarization monitoring programme. Interesting features illustrated include

  1. • Sudden changes of the position angle of the linear polarization by ≳ 70° in PKS 0537-441 and 1253-055 (3C279).

  2. • A linear increase in the position angle of the polarization of PKS 2134+004 through 70° over 3/12; years.

  3. • Distinct bursts of circular polarization in PKS 0430+052, 0537-441 and 1253-055. In PKS 0430+052 (3C120) such a burst coincides with the possible superluminal expansion (Walker et al., 1981). In PKS 1253-055 (3C279) a burst of circular polarization is currently occurring at a time of very low linear polarization.

Type
Research Article
Information
Symposium - International Astronomical Union , Volume 97: Extragalactic Radio Sources , 1982 , pp. 331 - 333
Copyright
Copyright © Reidel 1982 

References

Ledden, J.E., and Aller, H.D.: 1979, Astrophys. J. Lett. 229, L1.CrossRefGoogle Scholar
Walker, R.C., Seielstad, G.A., Simon, R.S., Unwin, S.C., Cohen, M.H., Pearson, T.J., and Linfield, R.P.: 1981 (personal communication).Google Scholar