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Close-range remote sensing of Saturn’s rings during Cassini’s ring-grazing orbits and Grand Finale

Journal
Date Issued
2019
Author(s)
Tiscareno, Matthew S.
•
Nicholson, Philip D.
•
Cuzzi, Jeffrey N.
•
Spilker, Linda J.
•
Murray, Carl D.
•
Hedman, Matthew M.
•
Colwell, Joshua E.
•
Burns, Joseph A.
•
Brooks, Shawn M.
•
Clark, Roger N.
•
Cooper, Nicholas J.
•
Deau, Estelle
•
Ferrari, Cecile
•
•
Jerousek, Richard G.
•
Le Mouélic, Stéphane
•
Morishima, Ryuji
•
Pilorz, Stu
•
Rodriguez, Sébastien
•
Showalter, Mark R.
•
Badman, Sarah V.
•
Baker, Emily J.
•
Buratti, Bonnie J.
•
Baines, Kevin H.
•
Sotin, Christophe
DOI
Abstract
Saturn’s rings are an accessible exemplar of an astrophysical disk, tracing the Saturn system’s dynamical processes and history. We present close-range remote-sensing observations of the main rings from the Cassini spacecraft. We find detailed sculpting of the rings by embedded masses, and banded texture belts throughout the rings. Saturn-orbiting streams of material impact the F ring. There are fine-scaled correlations among optical depth, spectral properties, and temperature in the B ring, but anticorrelations within strong density waves in the A ring. There is no spectral distinction between plateaux and the rest of the C ring, whereas the region outward of the Keeler gap is spectrally distinct from nearby regions. These results likely indicate that radial stratification of particle physical properties, rather than compositional differences, is responsible for producing these ring structures.
Volume
364
Issue
6445
Start page
eaau1017
Uri
Url
Issn Identifier
0036-8075
Rights
open.access
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