Dynamics of charged submicron grains in Halley's coma

Details Dynamics of charged submicron grains in Halley's coma Dynamics of charged submicron grains in Halley's coma

Sep 1987

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1987esasp.278..351w&link_type=abstract

In ESA, Proceedings of the International Symposium on the Diversity and Similarity of Comets p 351-353 (SEE N88-21884 14-91)

Physics

Cosmic Dust, Electrodynamics, Halley'S Comet, Electric Potential, Electron Distribution, Vega Project

Scientific paper

Two characteristics of the smallest (femtogram) grains in Comet Halley's coma are ascribed to electrical forces on them, namely, their penetration to large distances with any remnants of envelopes eliminated, and the dispersion with grain size of dust jets in the inner coma. This is shown quantitatively for the data from VEGA-2, when the magnetic field was at a suitable orientation. It is inferred that grain potentials in the inner coma are a few V negative, appropriate to a hot (eV) halo to the electron distribution in addition to the main cool core.

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