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Candice J. Hansen,1*L. Esposito,2A. I. F. Stewart,2J. Colwell,2A. Hendrix,1W. Pryor,4D. Shemansky,3R. West1
The Cassini spacecraft flew close to Saturn's small moon Enceladusthree times in 2005. Cassini's UltraViolet Imaging Spectrographobserved stellar occultations on two flybys and confirmed theexistence, composition, and regionally confined nature of awater vapor plume in the south polar region of Enceladus. Thisplume provides an adequate amount of water to resupply lossesfrom Saturn's E ring and to be the dominant source of the neutralOH and atomic oxygen that fill the Saturnian system.
1 Jet Propulsion Laboratory/California Institute of Technology, 4800 Oak Grove Drive, Pasadena, CA 91109, USA. 2 Laboratory for Air and Space Physics (LASP), University of Colorado, Boulder, CO 80303, USA. 3 Space Environment Technologies, 320 North Halstead, Suite 170, Pasadena, CA 91107, USA. 4 Central Arizona College, Coolidge, AZ 85228, USA.
* To whom correspondence should be addressed. E-mail: Candice.j.Hansen{at}jpl.nasa.gov
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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Identification of a dynamic atmosphere at Enceladus with the Cassini magnetometer..
M. K. Dougherty, K. K. Khurana, F. M. Neubauer, C. T. Russell, J. Saur, J. S. Leisner, and M. E. Burton (2006)
Science
311, 1406-1409
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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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Cassini ion and neutral mass spectrometer: Enceladus plume composition and structure..
J. H. Waite Jr., M. R. Combi, W.-H. Ip, T. E. Cravens, R. L. McNutt Jr., W. Kasprzak, R. Yelle, J. Luhmann, H. Niemann, D. Gell, et al. (2006)
Science
311, 1419-1422
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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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