Induced magnetic fields as evidence for subsurface oceans in Europa and Callisto

Nature

Volumn 395, Issue 6704, 1998, Pages 777-780

  Khurana, K K ^a   Kivelson, M G ^a,b   Stevenson, D J ^c   Schubert, G ^a,b   Russell, C T ^a,b   Walker, R J ^a   Polanskey, C ^d  

^a UNIVERSITY OF CALIFORNIA   (United States)

^b UNIVERSITY OF CALIFORNIA   (United States)

^c CALIFORNIA INSTITUTE OF TECHNOLOGY   (United States)

^d CALIFORNIA INSTITUTE OF TECHNOLOGY   (United States)

Author keywords

[No Author keywords available]

Indexed keywords

CALLISTO; EUROPA; MAGNETIC FIELD; OCEAN BASIN; PLANETARY SURFACE;

ARTICLE; ELECTRIC CONDUCTIVITY; ELECTROMAGNETIC RADIATION; GEOLOGY; MAGNETIC FIELD; OCEANIC REGIONS; PRIORITY JOURNAL; SPACE FLIGHT;

EXTRATERRESTRIAL ENVIRONMENT; JUPITER; MAGNETICS; SALTS; WATER;

CALLISTO;

EID: 0032558839     PISSN: 00280836     EISSN: None     Source Type: Journal    
DOI: 10.1038/27394     Document Type: Article

References (34)

1. Kivelson, M. G. et al. Europa's magnetic signature: report from Galileo's first pass on December 19, 1996. Science 276, 1239-1241 (1997).
2. Khurana, K. K., Kivelson, M. G., Russell, C. T., Walker, R. J. & Southwood, D. J. Absence of an internal magnetic field at Callisto. Nature 387, 262-264 (1997).
3. Kivelson, M. G. Discovery of Ganymede's magnetic field by the Galileo spacecraft. Nature 384, 537-541 (1996).
4. Kivelson, M. G. et al. A magnetic signature at Io: initial report from the Gallileo magnetometer. Science 273, 337-340 (1996).
5. Carr, M. H. et al. Evidence for a subsurface ocean on Europa. Nature 391, 363-365 (1998).
6. Pappalardo, R. T. et al. Geological evidence for solid-state convection in Europa's ice shell. Nature 391, 365-368 (1998).
7. Parkinson, W. D. Introduction to Geomagnetism 308-340 (Scottish Academic, Edinburgh, 1993).
8. Neubauer, F. M. Nonlinear standing Alfvén wave current system at Io: Theory. J. Geophys. Res. 85, 1171-1178 (1980).
9. L: WIND magnetic field observations. Geophys. Res. Lett. 23, 1263-1266 (1996).
10. Khurana, K. K. & Kivelson, M. G. Ultra low frequency MHD waves in Jupiter's middle magnetosphere. J. Geophys. Res. 94, 5241-5254 (1989).
11. Ip, W-H. Europa's oxygen exosphere and its magnetospheric interaction. Icarus 120, 317-325 (1996).
12. Kliore, A. J., Hinson, D. P., Flasar, F. M., Nagy, A. F. & Cravens, T. E. The ionosphere of Europa from Galileo radio occultations. Science 277, 355-358 (1997).
13. Neubauer, F. M. The subalfvénic interaction of the Galilean satellites with the Jovian magnetosphere. J. Geophys. Res. (Planets) 103, 19843-19866 (1998).
14. Montgomery, R. B. in American Institute of Physics Handbook 125-127 (McGraw Hill, New York, 1963).
15. Colburn, D. S. & Reynolds, R. T. Electrolytic currents in Europa. Icarus 63, 39-44 (1985).
16. Kargel, J. S. & Consolmagno, G. J. Magnetic fields and the detectability of brine oceans in Jupiter's icy satellites. Lunar Planet. Sci. Conf. XXVII, 643-644 (1996).
17. Schubert, G., Spohn, T. & Reynolds, R. in Satellites (eds Burns, J. A. & Matthews, M. S.) 224-292 (Univ. Arizona Press, Tucson, 1986).
18. Anderson, J. D. Europa's differentiated internal structure: inferences from four Galileo encounters Science (in the press).
19. Reynolds, R. T. & Cassen, P. On the internal structure of the major satellites of the outer planets. Geophys. Res. Lett. 6, 121-124 (1979).
20. Kirk, R. L. & Stevenson, D. J. Thermal evolution of a differentiated Ganymede and implications for surface features. Icarus 69, 91-135 (1987).
21. Cassen, P.M., Reynolds, R. T. & Peale, S. J. Is there liquid water on Europa? Geophys. Res. Lett. 6, 731-734 (1979).
22. Squyres, S. W., Reynolds, R. T., Cassen, P. M. & Peale, S. J. Liquid water and active resurfacing on Europa. Nature 301, 225-226 (1983).
23. Ross, M. N. & Schubert, G. Tidal heating in an internal ocean model of Europa. Nature 325, 133-134 (1987).
24. Ojakangas, G. W. & Stevenson, D. J. Thermal state of an ice shell on Europa. Icarus 81, 220-241 (1989).
25. Durham, W. B., Kirby, S. H. & Stern, L. A. Creep of water ices at planetary conditions: a compilation. J. Geophys. Res. 102, 16293-16302 (1997).
26. McCord, T. B. et al. Salts on Europa's surface detected by Galileo's Near Infrared Mapping Spectrometer. Science 280, 1242-1245 (1998).
27. Stevenson, D. I. in Proc. Europa Conf. 69-70 (San Juan Capistrano Research Inst., San Juan Capistrano, CA, 1996).
28. Anderson, J. D. et al. Distribution of rock, metals, and ices in Callisto. Science 280, 1573-1576 (1998).
29. Anderson, J. D., Lau, E. L., Sjogren, W. L., Schubert, G. & Moore, W. B. Gravitational constraints on the internal structure of Ganymede. Nature 384, 541-543 (1996).
30. Schubert, G., Zhang, K., Kivelson, M. G. & Anderson, J. D. The magnetic field and internal structure of Ganymede. Nature 384, 544-545 (1996).
31. Jackson, J. D. Classical Electrodynamics 2nd edn 338 (Wiley, New York, 1975).
32. Connerney, J. E. P. Magnetic fields of the outer planets. J. Geophys. Res. 98, 18659-18679 (1993).
33. Khurana, K. K. Euler potential models of Jupiter's magnetospheric field. J. Geophys. Res. 102, 11295-11306 (1997).
34. M. G. Kivelson et al. Europa and Callisto; induced or intrinsic fields in a periodically varying plasma environment. J. Geophys. Res. (submitted).