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Detailed Reference Information |
Paranicas, C.P. and Cheng, A.F. (1991). Theory of ring sweeping of energetic particles. Journal of Geophysical Research 96: doi: 10.1029/91JA01136. issn: 0148-0227. |
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Because the effective ''area'' of the Neptunian rings is larger than that of the inner moons, the sweeping of energetic particles by the rings is perhaps the dominant process for particle loss in the magnetosphere within 5 RN. In this paper we describe a theory for calculating the absorption probability of energetic charged particles by the rings. We include the effects of a large tilt and an offset between the planet and dipole centers. We find that the probability of absorption for protons is so high that the sweeping lifetime is only a few times the gradient-curvature drift period. For electrons the sweeping lifetime is even less. The pitch angle dependence for sweeping manifests itself strongly only at large equatorial pitch angles. Lower-energy particles have higher absorption rates by the rings. ¿American Geophysical Union 1991 |
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Abstract |
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Keywords
Magnetospheric Physics, Planetary magnetospheres, Planetology, Fluid Planets, Rings and dust, Planetology, Fluid Planets, Interactions with particles and fields |
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Publisher
American Geophysical Union 2000 Florida Avenue N.W. Washington, D.C. 20009-1277 USA 1-202-462-6900 1-202-328-0566 service@agu.org |
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