The Search for Activity on Dione and Tethys With Cassini VIMS and UVIS
AuthorBuratti, B. J.
Hansen, C. J.
Hendrix, A. R.
Esposito, L. W.
Mosher, J. A.
Brown, R. H.
Clark, R. N.
Baines, K. H.
Nicholson, P. D.
AffiliationUniv Arizona, Lunar & Planetary Lab
MetadataShow full item record
PublisherAMER GEOPHYSICAL UNION
CitationBuratti, B. J., Hansen, C. J., Hendrix, A. R., Esposito, L. W., Mosher, J. A., Brown, R. H., et al. (2018). The search for activity on Dione and Tethys with Cassini VIMS and UVIS. Geophysical Research Letters, 45, 5860–5866. https://doi.org/10.1029/2018GL078165
JournalGEOPHYSICAL RESEARCH LETTERS
Rights©2018. American Geophysical Union. All Rights Reserved.
Collection InformationThis item from the UA Faculty Publications collection is made available by the University of Arizona with support from the University of Arizona Libraries. If you have questions, please contact us at email@example.com.
AbstractDuring the Cassini mission the Saturnian moons Dione and Tethys showed intriguing and multiple clues suggesting residual geologic activity that might be detectable as an atmosphere, plume, or even heat signature. These clues included an atmospheric aura around Dione, injection of particles into Saturn's magnetosphere, mysterious red streaks on Tethys, and possible cryovolcanic features on Dione. A concerted effort that was strengthened in the latter stages of the mission included the acquisition of stellar occulations by the Ultraviolet Imaging Spectrograph (UVIS) of both Dione and Tethys and high solar phase observations of Dione by the Visible Infrared Mapping Spectrometer (VIMS) to detect forward scattering from grains in a plume. Analysis of these observations shows no evidence for even a low level of activity on either moon. In addition, infrared images at 2.65m obtained throughout the mission were scrutinized for the reappearance of an atmosphere-like aura, with negative results. Plain Language Summary Two moons of Saturn, Dione and Tethys, showed intriguing clues suggesting residual geologic activity on their surfaces throughout the Cassini mission. A close inspection of data from the ultraviolet and visible/infrared imagers on Cassini failed to detect an atmosphere or plume on either moon.
Note6 month embargo; published online: 07 June 2018
VersionFinal published version
SponsorsCassini project; Jet Propulsion Laboratory, California Institute of Technology