Upstream waves of cometary origin detected by the Giotto magnetic field experiment

Details Upstream waves of cometary origin detected by the Giotto magnetic field experiment Upstream waves of cometary origin detected by the Giotto magnetic field experiment

Dec 1986

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1986esasp.250c.447a&link_type=abstract

In ESA, Proceedings of the 20th ESLAB Symposium on the Exploration of Halley's Comet. Volume 3: Posters 447-449 (SEE N87-26714 2

Physics

Bow Waves, Halley'S Comet, Interplanetary Magnetic Fields, Plasma Turbulence, Plasma Waves, Giotto Mission, Linear Polarization, Radiant Flux Density, Water, Waveforms

Scientific paper

Upstream waves associated with water group ions have been detected by the GIOTTO magnetic field experiment at distances up to 5.2×106km from the nucleus of comet P/Halley. They show predominantly quasi-linear polarization with spectral characteristics typical of turbulent cascade processes. Spectral power densities are well above solar wind levels and at similar or lower levels than those observed near comet P/Giacobini-Zinner. The observed waveforms exhibit different characteristics from those detected by the ICE mission. In particular, wavefront steeping and associated higher frequency wave packets have not been yet identified.

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