Variable radio sources and the two-fluid models

  • G. Pelletier
  • Jacques Roland
  • Hélène Sol
Conference paper
Part of the Lecture Notes in Physics book series (LNP, volume 377)


Superluminal radio sources associated with extended double sources can be explained by a two-fluid model that consist of i) a non-relativistic e -p jet responsible for the formation of the extended lobes and ii) a relativistic e-e+ beam responsible for superluminal radio sources. When the magnetic is greater than a critical value Bc, the beam can propagate along the magnetic field lines without dissipation. Natural consequences of the beam-jet interaction are, in the dissipation area, the acceleration of relativistic electrons by strong Langmuir turbulence, the possible formation of shocks, the emission of coherent emission and the generation of a local toroidal magnetic field. Depending on the value of the magnetic field in the beam compared to the critical value, one can observe superluminal quasars, BL Lac objects or flickering radio sources.


Unable to display preview. Download preview PDF.

Unable to display preview. Download preview PDF.


  1. Baker, D.N., Borovsky, J.E., Benford, G., Eleik, J.A. (1988): Astrophys. J. 328, 110CrossRefGoogle Scholar
  2. Bicknell, G.V. (1984): Astrophys. J. 288, 68CrossRefGoogle Scholar
  3. Bicknell, G.V. (1986-a): Astrophys. J. 300, 591CrossRefGoogle Scholar
  4. Bicknell, G.V. (1986-b): Astrophys. J. 305, 109CrossRefGoogle Scholar
  5. Blandford, R.D., Payne, D.G. (1982): Monthly Notices Roy. Astron. Soc. 199, 883Google Scholar
  6. Browne, I.W.A. (1987): Superluminal Radio Sources, Cambridge University Press, A. Zensus and T. Pearson EditorsGoogle Scholar
  7. Cohen, M.H. (1990): Astrophysical Ages and Dating Methods, Editions Frontiéres, E. Flam, M. Cassé, J. Audouze and J. Tran Than Van EditorsGoogle Scholar
  8. Conway, R.G. (1988): Magnetic Fields and Extragalactic Objects, Editions de Physique, E. Asseo and D. Grésillon EditorsGoogle Scholar
  9. Davis, R.J., Muxlow, T.W.B., Conway, R.G. (1985): Nature, 318,343CrossRefGoogle Scholar
  10. Draine, B.T. (1983): Astrophys. J. 270, 519CrossRefGoogle Scholar
  11. Fanti, C., Fanti, R., de Ruiter, H.R., Parma, P. (1987): Astron. Astrophys. Suppl. 89, 57Google Scholar
  12. Flatters, C., Conway, R.G. (1985), Nature, 314, 425CrossRefGoogle Scholar
  13. Foley, A.R., Davis, R.J. (1985): Monthly Notices Roy. Astron. Soc. 216, 679Google Scholar
  14. Johnston, K.J., Simon, R.S., Eckart, A., Biermann, P., Schalinski, C., Witzel, A., Strom, R.G. (1987): Astrophys. J. 313, L85CrossRefGoogle Scholar
  15. Leahy, J.P., Muxlow, T.W.B., Stephens, P.W. (1989): Monthly Notices Roy. Astron. Soc. 239,401Google Scholar
  16. Marr, J.M., Backer, D.C., Wright, M.C.H., Readhead, A.C.S., Moore, R. (1989): Astrophys. J. 337, 671CrossRefGoogle Scholar
  17. Meisenheimer, K., Röser, H.J., Hiltner, P.R., Yates, M.G., Longair, M.S., Chini, R., Perley, R.A. (1989): Astron. Astrophys. 219, 63Google Scholar
  18. Morganti, R., Fanti, C., Fanti, R., Parma, P., de Ruiter, H.R. (1987): Astron. Astrophys. 183,203Google Scholar
  19. Muxlow, T.W.B., Pelletier, G., Roland, J. (1988): Astron. Astrophys. 206, 237Google Scholar
  20. Parma, P., Fanti, C., Fanti, R., Morganti, R., de Ruiter, H.R. (1987): Astron. Astrophys. 181,244Google Scholar
  21. Pelletier, G., Zaninetti, L. (1984): Astron. Astrophys. 136, 313Google Scholar
  22. Pelletier, G., Roland, J. (1986): Astron. Astrophys. 163, 9Google Scholar
  23. Pelletier, G., Roland, J. (1988): Astron. Astrophys. 196, 71Google Scholar
  24. Pelletier, G., Sol, H., Asseo, E. (1988): Phys. Rev. A. 38, 2552CrossRefPubMedGoogle Scholar
  25. Pelletier, G., Roland, J. (1989): Astron. Astrophys. 224, 24Google Scholar
  26. Pelletier, G., Roland, J. (1990): Parsec-scale Radio Jets, Cambridge University Press, A. Zensus and T. Pearson EditorsGoogle Scholar
  27. Perley, R.A., Willis, A.G., Scott, J.S. (1979): Nature 281, 437CrossRefPubMedGoogle Scholar
  28. Pudritz, R.E., Norman, C.A. (1983): Astrophys. J. 274, 677CrossRefGoogle Scholar
  29. Reid, M.J., Biretta, J.A., Junor, W., Muxlow, T.W.B., Spencer, R.E. (1989): Astrophys. J. 336, 112CrossRefGoogle Scholar
  30. Roland, J., Pelletier, G., Muxlow, T.W.B. (1988): Astron. Astrophys. 207, 16Google Scholar
  31. Shklovsky, I.S. (1982): Extragalactic Radio Sources, Reidel Publishing Company, D. Heeschen and C. Wade EditorsGoogle Scholar
  32. Sol, H., Pelletier, G., Asseo, E. (1989): Monthly Notices Roy. Astron. Soc. 237, 411Google Scholar
  33. Uchida, Y., Shibata, K. (1985): Publ. Astron. Soc. Japan, 37, 515Google Scholar

Copyright information

© Springer-Verlag 1991

Authors and Affiliations

  • G. Pelletier
    • 1
  • Jacques Roland
    • 2
  • Hélène Sol
    • 3
  1. 1.Observatoire de GrenobleCERMO BP68St. Martin d'Hères CedexFrance
  2. 2.Institut d'AstrophysiqueParisFrance
  3. 3.Observatoire de MeudonMeudonFrance

Personalised recommendations