期刊
SCIENCE
卷 364, 期 6445, 页码 1054-+出版社
AMER ASSOC ADVANCEMENT SCIENCE
DOI: 10.1126/science.aau1017
关键词
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资金
- NASA Cassini Data Analysis program [NNX16AI33G, NNX15AH22G]
- Cassini project
- NASA via the Cassini Project under JPL [1403282]
- NASA
- U.S. government
- UK Science and Technology Facilities Council [ST/P000622/1, ST/R000816/1, ST/M005534/1]
- Italian Space Agency
- Italian National Institute for Astrophysics
- French Space Agency CNES
- STFC [ST/M001202/1, ST/P000622/1, ST/M005534/1, ST/R000816/1] Funding Source: UKRI
- Science and Technology Facilities Council [ST/R000816/1, ST/M005534/1] Funding Source: researchfish
- NASA [903209, NNX15AH22G, 803956, NNX16AI33G] Funding Source: Federal RePORTER
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.
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