Computer Science
Scientific paper
Dec 1986
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1986esasp.250c.441r&link_type=abstract
In ESA, Proceedings of the 20th ESLAB Symposium on the Exploration of Halley's Comet. Volume 3: Posters p 441-445 (SEE N87-26714
Computer Science
Distribution Functions, Giacobini-Zinner Comet, Heavy Ions, International Sun Earth Explorer 3, Plasma Spectra, Bow Waves, Energy Spectra, Ion Density (Concentration), Plasma Waves
Scientific paper
The spectrum and bulk parameters of energetic heavy pick-up ions within ≡4×105km of comet Giacobini-Zinner are investigated using data from the EPAS experiment on the ICE spacecraft. In the ion rest frame the distribution function is of the form f ≡ e-v/v0 at ≡10 - 400 keV, with v0 ≡ 60 km s-1 outside the bow wave increasing to ≡80 km s-1 in the mass-loaded region. Comparison with spectra obtained by the ULECA sensor shows good agreement. Some evidence of a down turn at the lowest energies is seen in these spectra. Estimates of the pick-up ion number density and energy density have also been made. These are consistent with the results of a simple model of the pick-up process except within 105km of closest approach where a marked density depletion is observed.
Cowley Stan W. H.
Daly Patrick W.
Hynds R. J.
Moore V.
Richardson Ian G.
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