Other
Scientific paper
Nov 1992
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1992adspr..12...55k&link_type=abstract
(Planetary studies; Proceedings of Symposium 4 and the Topical Meeting of the Interdisciplinary Scientific Commission B /Meeting
Other
Energetic Particles, Neptune (Planet), Planetary Magnetospheres, Plasma Waves, Radio Emission, Space Plasmas, Planetary Radiation, Plasma Density, Polar Regions, Ultraviolet Emission, Voyager 2 Spacecraft
Scientific paper
The first results of measurements performed on the Voyager 2 spacecraft with the Neptune system on August 24-28, 1989 are summarized. These include measurements of the magnetic field, plasma, energetic and high energy particles, plasma waves and radio emissions, and additional information relating to UV emissions. The planetary magnetic field outside about 4 R(N) may be described by an offset, tilted, dipole of moment 0.133 Gauss-R(N) exp 3; inside that distance the field is dominated by higher order terms. Plasma densities are found to be generally low (about 5 exp -3/cu cm), except at magnetic equatorial crossings when densities are up to about 1/cu cm. A variety of plasma wave emissions were seen, including chorus, hiss, electroncyclotron waves, and upper hybrid resonance in the inner magnetosphere. The measured flux of soft electrons and ions over the polar region of about 2 x 10 exp -3 erg/sq cm sec results in an estimated power input of about 3 x 10 exp 7 W, which is substantially less than that at other planets.
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