Satellite sweeping of electrons at Neptune and Uranus

Details Satellite sweeping of electrons at Neptune and Uranus Satellite sweeping of electrons at Neptune and Uranus

Sep 1990

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1990georl..17.1665c&link_type=abstract

Geophysical Research Letters (ISSN 0094-8276), vol. 17, Sept. 1990, p. 1665-1668.

Astronomy and Astrophysics

Astronomy

7

Artificial Satellites, Energetic Particles, Magnetospheric Electron Density, Neptune Atmosphere, Planetary Magnetic Fields, Uranus Atmosphere, Astronomical Models, Planetary Magnetospheres, Satellite Orbits

Scientific paper

Knowledge of satellite sweeping parameters at Neptune and Uranus, and of their functional dependences on particle energy and pitch angle, can be critical in the proper identification of parent absorbers for observed absorption signatures in regions where OTD (offset, tilted dipole) models are valid representations of the measured magnetic fields. In this paper, critical electron energies are calculated for longitudinal drift resonance, snowplow (i.e., strong) absorption, leapfrog, and corkscrew effects, using a reduced version of OTD that neglects nonaxial dipole offsets. Earlier analytic work on sweeping rates is extended to give the radial dependence of these rates within the minimum-L region and to set limits on diffusion of electrons with the simplifying approximation that leapfrog effects are ignored.

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