Physics – Plasma Physics
Scientific paper
Dec 1988
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1988jplph..40..399d&link_type=abstract
Journal of Plasma Physics (ISSN 0022-3778), vol. 40, Dec. 1988, p. 399-406.
Physics
Plasma Physics
139
Halley'S Comet, Interplanetary Dust, Ionic Waves, Plasma-Particle Interactions, Space Plasmas, Giotto Mission, Plasma Density, Vega Project
Scientific paper
Ion waves in a plasma are investigated in the presence of massive charged dust particles, a common space-plasma component now known to exist also in planetary rings and comets. An equation is derived describing low-frequency electrostatic perturbations on a nonhomogeneous background, where the inhomogeneity is due to a distribution of charged grains, each surrounded by an equilibrium statistical distribution of plasma particles. This model is then applied to propose an interpretation of some recent data from the Vega and Giotto space probes to Halley's comet concerning the increase of the low-frequency electrostatic noise (ion-acoustic waves) in the region of increased dust.
de Angelis Umberto
Formisano Vittorio
Giordano Matteo
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