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Strong tidal dissipation in Io and Jupiter from astrometric observations

Author

Listed:
  • Valéry Lainey

    (IMCCE-Observatoire de Paris, UMR 8028 du CNRS, 77 Avenue Denfert-Rochereau, 75014 Paris, France)

  • Jean-Eudes Arlot

    (IMCCE-Observatoire de Paris, UMR 8028 du CNRS, 77 Avenue Denfert-Rochereau, 75014 Paris, France)

  • Özgür Karatekin

    (Royal Observatory of Belgium, Avenue Circulaire 3, Uccle, 1180 Bruxelles, Belgium)

  • Tim Van Hoolst

    (Royal Observatory of Belgium, Avenue Circulaire 3, Uccle, 1180 Bruxelles, Belgium)

Abstract

Io's tidal volcanoes The extreme geological activity that makes Jupiter's moon Io the most volcanically active body in the Solar System is thought to be the result of tides raised by Jupiter, but it is not known whether the current tidal heat production is sufficiently high to generate the observed surface heat flow. Making use of astrometic observations made between 1891 and 2007, Lainey et al. have estimated the tidal dissipation in Io by tracking its effect on the orbital motions of the Galilean moons. For Io the value is in good agreement with the observed surface heat flow and suggests that Io is close to thermal equilibrium. Dissipation in Jupiter is close to the upper bound of its average value expected from the long-term evolution of the system.

Suggested Citation

  • Valéry Lainey & Jean-Eudes Arlot & Özgür Karatekin & Tim Van Hoolst, 2009. "Strong tidal dissipation in Io and Jupiter from astrometric observations," Nature, Nature, vol. 459(7249), pages 957-959, June.
    • Handle: RePEc:nat:nature:v:459:y:2009:i:7249:d:10.1038_nature08108
    DOI: 10.1038/nature08108
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