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Identification of a Dynamic Atmosphere at Enceladus with the Cassini Magnetometer
M. K. Dougherty,1*K. K. Khurana,2F. M. Neubauer,3C. T. Russell,2J. Saur,3J. S. Leisner,2M. E. Burton4
The Cassini magnetometer has detected the interaction of themagnetospheric plasma of Saturn with an atmospheric plume atthe icy moon Enceladus. This unanticipated finding, made ona distant flyby, was subsequently confirmed during two follow-onflybys, one very close to Enceladus. The magnetometer data areconsistent with local outgassing activity via a plume from thesurface of the moon near its south pole, as confirmed by otherCassini instruments.
1 Blackett Laboratory, Imperial College London, London SW7 2AZ, UK. 2 Institute of Geophysics and Planetary Physics, University of California, Los Angeles, CA 90025, USA. 3 Institute for Geophysics and Meteorology, Köln University, 50923 Köln, Germany. 4 Jet Propulsion Laboratory, California Institute of Technology, Pasadena, CA 91109, USA.
* To whom correspondence should be addressed. E-mail: m.dougherty{at}imperial.ac.uk
The Variable Rotation Period of the Inner Region of Saturn's Plasma Disk.
D. A. Gurnett, A. M. Persoon, W. S. Kurth, J. B. Groene, T. F. Averkamp, M. K. Dougherty, and D. J. Southwood (2007)
Science
316, 442-445
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Cassini observes the active south pole of Enceladus..
C. C. Porco, P. Helfenstein, P. C. Thomas, A. P. Ingersoll, J. Wisdom, R. West, G. Neukum, T. Denk, R. Wagner, T. Roatsch, et al. (2006)
Science
311, 1393-1401
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Cassini encounters Enceladus: background and the discovery of a south polar hot spot..
J. R. Spencer, J. C. Pearl, M. Segura, F. M. Flasar, A. Mamoutkine, P. Romani, B. J. Buratti, A. R. Hendrix, L. J. Spilker, and R. M. C. Lopes (2006)
Science
311, 1401-1405
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The interaction of the atmosphere of Enceladus with Saturn's plasma..
R. L. Tokar, R. E. Johnson, T. W. Hill, D. H. Pontius, W. S. Kurth, F. J. Crary, D. T. Young, M. F. Thomsen, D. B. Reisenfeld, A. J. Coates, et al. (2006)
Science
311, 1409-1412
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Enceladus' varying imprint on the magnetosphere of Saturn..
G. H. Jones, E. Roussos, N. Krupp, C. Paranicas, J. Woch, A. Lagg, D. G. Mitchell, S. M. Krimigis, and M. K. Dougherty (2006)
Science
311, 1412-1415
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Cassini dust measurements at Enceladus and implications for the origin of the E ring..
F. Spahn, J. Schmidt, N. Albers, M. Horning, M. Makuch, M. Seiss, S. Kempf, R. Srama, V. Dikarev, S. Helfert, et al. (2006)
Science
311, 1416-1418
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Enceladus' water vapor plume..
C. J. Hansen, L. Esposito, A. I. F. Stewart, J. Colwell, A. Hendrix, W. Pryor, D. Shemansky, and R. West (2006)
Science
311, 1422-1425
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Composition and physical properties of Enceladus' surface..
R. H. Brown, R. N. Clark, B. J. Buratti, D. P. Cruikshank, J. W. Barnes, R. M. E. Mastrapa, J. Bauer, S. Newman, T. Momary, K. H. Baines, et al. (2006)
Science
311, 1425-1428
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