Astronomy and Astrophysics – Astrophysics
Scientific paper
Oct 1981
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1981ap%26ss..79..491a&link_type=abstract
Astrophysics and Space Science, vol. 79, no. 2, Oct. 1981, p. 491-505.
Astronomy and Astrophysics
Astrophysics
11
Cosmic Plasma, Cosmology, Rotating Plasmas, Saturn Rings, Space Missions, Voyager Project, Asteroid Belts, Centrifugal Force, Circular Orbits, Cosmic Dust, Elliptical Orbits, Encke Method, Gravitational Fields, Planetary Magnetic Fields, Shadows, Saturn, Voyager 1, Shadows, Electric Fields, Electromagnetic Effects, Magnetic Fields, Plasmas, Dust, Distance, Rings, Formation, Models, Observations, Comparisons, Theoretical Studies, Asteroid Belt, Mass, Diagrams, Cosmology, Resonance, Diffusion, Distribution, S
Scientific paper
The Voyager 1/Saturn mission results show that the macrostructure of the Saturnian ring system can be explained in terms of the following effect at the time of the system's formation: (1) if an electrically conducting medium such as a dusty plasma rotates around a gravitating central body, which possesses an axisymmetric dipole field, the medium will (2) be two-thirds supported by the centrifugal force and (3) one-third supported by electromagnetic forces, under the condition that the magnetic field is strong enough to control the motion. If the magnetic forces disappear, for instance through a de-ionization of the dusty plasma, the medium will (4) fall down to two-thirds of its original central distance. The result of this process will be a 'cosmogonic shadow' effect, which is described in detail. The agreement between theoretical results and observations is better than a few percent.
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