ISS of Polarized Compact Extragalactic Radio Sources

  • Barney Rickett


It is shown that the detailed inter-relations of the 8.6 GHz mv in Stokes’ parameters I,Qand U of the quasar 0405-385, as quantified by their auto and cross correlations, can be successfullymodelled by interstellar scintil1ation (ISS) of a double source with two components separated byabout 10 micro-arc seconds. Though this is not a unique source model it confirms that ISS can explainquantitatively the rapid variations in both flux and linear polarization. Thus there is no evidence insupport of an intrinsic component in the IDV.


Interstel1ar, scintillation, AGN, polarization 


Unable to display preview. Download preview PDF.

Unable to display preview. Download preview PDF.


  1. Dennett-Thorpe, J and de Bruyn, A.G.: 2000, The Discovery of a Microarcsecond Quasar: J1819+3845, Astrophys. J. 529, L65–L68.ADSCrossRefGoogle Scholar
  2. Kedziora-Chudczer, L., Jauncey, D.L., Wieringa, M.H., Walker, M.A., Nicholson, G.D., Reynolds, J.E. and Tzioumis, A.K.: 1997, PKS 0405-385: The Smallest Quasar?, Astrophys. J. 490, L9–12.ADSCrossRefGoogle Scholar
  3. Little, L.T. and Hewish, A.: 1966, Interplanetary Scintillation and its Relation to the Angular Structure of Radio Sources, Mon. Not. R. Astron. Soc. 134, 221–237.ADSGoogle Scholar
  4. Quirrenbach, A., Witzel, A., Krichbaum, T.P., Hummel, C.A., Alberdi, A. and Schalinski, C.: 1989a, Rapid Variability of Extragalactic Radio Sources, Nature 337, 442–444.ADSCrossRefGoogle Scholar
  5. Quirrenbach, A., Witzel, A., Qian, S.J., Krichbaum, T.P., Hummel, C.A. and Alberdi, A.: 1989b, Rapid radio polarization variability in the quasar 0917+624, Astron. Astrophys. 226, L1–L4.ADSGoogle Scholar
  6. Rickett, B.J.: 1990, Radio propagation through the Turbulent Interstellar Plasma, Annu. Rev. Astron. Astrophys. 28, 561–605.ADSCrossRefGoogle Scholar
  7. Rickett, B.J., Coles, W.A. and Markkanen, J.: 2000, Interstellar Scintillation of Pulsar B0809+74, Astrophys. J. 533, 304–319.ADSCrossRefGoogle Scholar
  8. Rickett, B.J., Quirrenbach, A., Wegner, R., Krichbaum, T. and Witzel, A.: 1995, Interstellar Scintillation of the Radi Source 0917+624, Astron. Astrophys. 293, 479–492.ADSGoogle Scholar

Copyright information

© Springer Science+Business Media Dordrecht 2001

Authors and Affiliations

  • Barney Rickett
    • 1
  1. 1.University of CaliforniaSan DiegoUSA

Personalised recommendations