Physics
Scientific paper
Mar 1986
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1986georl..13..291g&link_type=abstract
Geophysical Research Letters (ISSN 0094-8276), vol. 13, March 1986, p. 291-294.
Physics
25
Giacobini-Zinner Comet, International Sun Earth Explorer 3, Interplanetary Dust, Plasma Probes, Density (Number/Volume), Impact, Mass Distribution, Plasma Waves, Radial Distribution, Comets, Giacobini-Zinner, Ice Mission, Spacecraft Observations, Dust, Particles, Plasma Wave Instrument, Impacts, Distance, Production Rates, Models, Ionization, Mass, Radius, Density, Distribution
Scientific paper
During the ICE flyby of Giacobini-Zinner the plasma wave instrument detected numerous impulsive signals caused by dust impacts on the spacecraft. Most of the impacts occurred within 30,000 km of the comet. The impact rate averaged over the inbound and outbound legs varies approximately as 1/r-squared, as would be expected for an isotropic constant velocity radial outflow. Small differences between the inbound and outbound legs exist which may be indicative of azimuthal variations in the dust production rate. A simple model of the impact ionization and charge collection by the antenna indicates that the particles have a mass on the order of 10 to the -12 to 10 to the -10th gm, corresponding to particles with radii of a few microns.
Averkamp T. F.
Grün Eberhard
Gurnett Donald A.
Scarf Frederick L.
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