Astrophysics and Space Science

, Volume 277, Issue 1–2, pp 293–300 | Cite as

Magnetically-Driven Planetary Radio Emissions and Application to Extrasolar Planets

  • Philippe Zarka
  • Rudolf A. Treumann
  • Boris P. Ryabov
  • Vladimir B. Ryabov
Article

Abstract

At least six intense nonthermal planetary radio emissions are known in our solar system: the auroral radio emissions from the Earth, Jupiter, Saturn, Uranus and Neptune, and the radio bursts from the Io-Jupiter flux tube. The former are thought to be driven by the solar wind flow pressure or energy flux on the magnetospheric cross-section, while the latter is a consequence of the Io-Jupiter electrodynamic interaction. Although in the solar wind, the flow ram pressure largely dominates the magnetic one, we suggest that the incident magnetic energy flux is the driving factor for all these six radio emissions, and that it can be estimated in the same way in all cases. Consequences for the possible radio emission from extrasolar planets are examined. ‘Hot Jupiters’, if they are magnetized, might possess a radio emission several orders of magnitude stronger than the Jovian one, detectable with large ground-based low-frequency arrays. On the other hand, `giants' analogous to the Io-Jupiter interaction in the form of a pair star/hot-Jupiter are unlikely to produce intense radio emissions, unless the star is very strongly magnetized.

Preview

Unable to display preview. Download preview PDF.

Unable to display preview. Download preview PDF.

References

  1. Acuña, M.H., Neubauer, F.M. and Ness, N.F.: 1981, J. Geophys. Res. 86, 8513-8522.ADSGoogle Scholar
  2. Connerney, J.E.P. et al.: 1993, Science 262, 1035-1038.ADSGoogle Scholar
  3. Crary, F.J.: 1997, J. Geophys. Res. 102, 37-49.CrossRefADSGoogle Scholar
  4. Desch, M.D.: 1983, J. Geophys. Res. 88, 6904-6910.ADSCrossRefGoogle Scholar
  5. Desch, M.D. and Kaiser, M.L.: 1981, Nature 292, 739-741.CrossRefADSGoogle Scholar
  6. Desch, M.D. and Kaiser, M.L.: 1984, Nature 310, 755-757.CrossRefADSGoogle Scholar
  7. Farrell, W.M., Desch, M.D. and Zarka, P.: 1999, J. Geophys. Res. 104, 14025-14032.CrossRefADSGoogle Scholar
  8. Galopeau, P., Zarka, P. and Le Quéau, D.: 1989, J. Geophys. Res. 94, 8739-8755.ADSGoogle Scholar
  9. Galopeau, P., Zarka, P. and Le Quéau, D.: 1995, J. Geophys. Res.-Planets 100, 26397-26410.CrossRefADSGoogle Scholar
  10. Kivelson, M.G. et al.: 1998, J. Geophys. Res. 103, 19963-19972.CrossRefADSGoogle Scholar
  11. Louarn, P. et al.: 1998, Geophys. Res. Lett. 25, 2905-2908.CrossRefADSGoogle Scholar
  12. Menietti, J.D. et al.: 1998 Geophys. Res. Lett. 25, 4281-4284.CrossRefADSGoogle Scholar
  13. Ness, N.F. et al.: 1981 Science 212, 211-217.ADSGoogle Scholar
  14. Neubauer, F.M.: 1980, J. Geophys. Res. 85, 1171-1178.ADSGoogle Scholar
  15. Prangé, R. et al.: 1996, Nature 379, 323-325.CrossRefADSGoogle Scholar
  16. Pritchett, P.L.: 1986, Phys. Fluids 29, 2919.CrossRefADSGoogle Scholar
  17. Reiner, M.J., Kaiser, M.L. and Desch, M.D.: 2000, Geophys. Res. Lett. 27, 297-300.CrossRefADSGoogle Scholar
  18. Russell, C.T.: 2000, Adv. Space Res. 26 (3), 393-404.CrossRefADSGoogle Scholar
  19. Zarka, P.: 1992, Adv. Space Res. 12 (8), 99-115.CrossRefADSGoogle Scholar
  20. Zarka, P.: 1998, J. Geophys. Res. 103, 20159-20194.CrossRefADSGoogle Scholar
  21. Zarka, P.: 2000, Geophys. Monogr. 119, AGU, 167-178.Google Scholar
  22. Zarka, P. et al.: 1997, in: H.O. Rucker et al. (eds.), Planetary Radio Emissions IV, pp. 101-127, Austrian Acad. Sci. Press, Vienna.Google Scholar
  23. Zarka, P., Treumann, R.A. and Ryabov, B.P.: 2000, J. Geophys. Res., submitted.Google Scholar

Copyright information

© Kluwer Academic Publishers 2001

Authors and Affiliations

  • Philippe Zarka
    • 1
  • Rudolf A. Treumann
    • 2
    • 3
  • Boris P. Ryabov
    • 4
  • Vladimir B. Ryabov
    • 4
  1. 1.DESPACNRS/Observatoire de ParisMeudonFrance
  2. 2.Max-Planck Institute for Extraterrestrial PhysicsGarchingGermany
  3. 3.International Space Science InstituteBernSwitzerland
  4. 4.Institute of Radio AstronomyKharkovUkraine

Personalised recommendations