Resonance identifications in Saturn’s rings

1984 ◽  
Vol 75 ◽  
pp. 349-359
Author(s):  
M.E. Wiesel ◽  
F.A. Franklin
Keyword(s):  
Band Structure ◽  
Resonance Band ◽  
Saturn’S Rings ◽  
F Ring ◽  
Saturn's Rings

AbstractWhen Saturn’s oblateness perturbations are included, a single classical resonance splits into a resonance band structure. We have derived expressions for resonance location, libration region width, and the maximum librator range. We compare these predictions to areas of the C and B rings, the Cassini division, and the F ring, and offer some thoughts on possible mechanisms involved.

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

Science ◽  
2019 ◽  
Vol 364 (6445) ◽  
pp. eaau1017 ◽  
Author(s):  
Matthew S. Tiscareno ◽  
Philip D. Nicholson ◽  
Jeffrey N. Cuzzi ◽  
Linda J. Spilker ◽  
Carl D. Murray ◽  
...  
Keyword(s):  
Remote Sensing ◽  
Physical Properties ◽  
Optical Depth ◽  
Spectral Properties ◽  
Dynamical Processes ◽  
Ring Structures ◽  
Close Range ◽  
Saturn’S Rings ◽  
F Ring ◽  
Saturn's Rings

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.

Unusual imaging observations of Saturn's rings

1984 ◽  
Vol 75 ◽  
pp. 225-227
Author(s):  
Richard J. Terrile
Keyword(s):  
Large Scale ◽  
Imaging Experiment ◽  
Saturn’S Rings ◽  
F Ring ◽  
Saturn's Rings

Voyager cameras recorded a number of surprising and unusual features in Saturn's rings. These features include the large-scale markings (commonly called spokes) seen rotating around Saturn in the B-Ring, kinks and clumps in the F-Ring and A-Ring gap (Keeler or Encke gap) ringlets, wavy gap edges in the Cassini and A-Ring gaps, eccentric ringlets and chaotic ringlet structures. Detailed observations of these features by the Voyager imaging experiment will be discussed.

Comments on collision mechanics in ring systems

1984 ◽  
Vol 75 ◽  
pp. 407-422
Author(s):  
William K. Hartmann
Keyword(s):  
Asteroid Belt ◽  
Surface Erosion ◽  
Surface Layers ◽  
Ring Systems ◽  
Eclipse Observations ◽  
Saturn’S Rings ◽  
Saturn's Rings

ABSTRACTThe nature of collisions within ring systems is reviewed with emphasis on Saturn's rings. The particles may have coherent icy cores and less coherent granular or frosty surface layers, consistent with thermal eclipse observations. Present-day collisions of such ring particles do not cause catastrophic fragmentation of the particles, although some minor surface erosion and reaccretion is possible. Evolution by collisional fragmentation is thus not as important as in the asteroid belt.

Voyager UVS observations of stellar occultations by the rings of Saturn

1984 ◽  
Vol 75 ◽  
pp. 265-277
Author(s):  
J.B. Holbelg ◽  
W.T. Forrester
Keyword(s):  
Optical Depth ◽  
Distance Scale ◽  
Density Waves ◽  
Ring Density ◽  
Stellar Occultations ◽  
Saturn’S Rings ◽  
Saturn's Rings

ABSTRACTDuring the Voyager 1 and 2 Saturn encounters the ultraviolet spectrometers observed three separate stellar occultations by Saturn's rings. Together these three observations, which sampled the optical depth of the rings at resolutions from 3 to 6 km. can be used to establish a highly accurate distance scale allowing the identification of numerous ring features associated with resonances due to exterior satellites. Three separate observations of an eccentric ringlet near the location of the Titan apsidal resonance are discussed along with other ringlet-resonance associations occurring in the C ring. Density waves occurring in the A and B rings are reviewed and a detailed discussion of the analysis of one of these features is presented.

Profiling Saturn's rings by radio occultation

Icarus ◽  
1986 ◽  
Vol 68 (1) ◽  
pp. 120-166 ◽  
Author(s):  
Essam A. Marouf ◽  
G. Leonard Tyler ◽  
Paul A. Rosen
Keyword(s):  
Radio Occultation ◽  
Saturn’S Rings ◽  
Saturn's Rings

Saturn's rings—A survey

Icarus ◽  
1973 ◽  
Vol 18 (2) ◽  
pp. 317-337 ◽  
Author(s):  
A.F. Cook ◽  
F.A. Franklin ◽  
F.D. Palluconi
Keyword(s):  
Saturn’S Rings ◽  
Saturn's Rings

Structure and evolution of Saturn's rings

Icarus ◽  
1986 ◽  
Vol 67 (3) ◽  
pp. 345-357 ◽  
Author(s):  
Larry W. Esposito
Keyword(s):  
Saturn’S Rings ◽  
Saturn's Rings

Insertion loss of periodic cylindrical shells with helical slit

2021 ◽  
Vol 69 (3) ◽  
pp. 199-208
Author(s):  
Karisma Mohapatra ◽  
Dibya Prakash Jena
Keyword(s):  
Band Structure ◽  
Insertion Loss ◽  
Cylindrical Shells ◽  
Slit Width ◽  
Sharp Peak ◽  
Acoustic Attenuation ◽  
High Frequencies ◽  
Local Resonance ◽  
Resonance Band

We propose periodic shells with helical slit to overcome the lacuna in periodic C scatterers, where the first Bragg band is considerably reduced on increasing width of the slit. The key discovery of this research indicates that, by changing the upright slit of the C scatterers to helical slits, larger insertion loss (IL) is achieved around the first Bragg band without compromising the local resonance band. Comparing the performance of periodic shells without slit or cylindrical scatterers, it is found that IL becomes larger at first Bragg band. The pitch, thickness of the shell and width of helical slit can be altered to adjust the resonance of the proposed shells. On decreasing the pitch or increasing the slit width, the resonance band shifts toward high frequencies without much alteration in acoustic attenuation of bandwidth. Additionally, below threshold pitch, the said peak merges with first Bragg band and broadens with prominent IL. The calculated band structure authenticates the bandwidth of the first Bragg band, and the additional sharp peak in IL can be attributed to local resonance of the periodic scatterers.

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