Computer Science
Scientific paper
Dec 1986
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1986esasp.250a.175b&link_type=abstract
In ESA Proceedings of the 20th ESLAB Symposium on the Exploration of Halley's Comet. Volume 1: Plasma and Gas p 175-178 (SEE N87
Computer Science
Angular Distribution, Cometary Atmospheres, Energy Spectra, Halley'S Comet, Ion Distribution, Spectral Energy Distribution, Ion Temperature, Magnetohydrodynamic Flow, Mass Spectroscopy, Velocity Distribution
Scientific paper
During the early phase of the GIOTTO encounter with comet Halley, at distances from the nucleus greater than 350,000 km, the Neutral Mass Spectrometer was operated in a mode allowing the measurements of low energy ions. The data have revealed two important features of the outer coma: the first one is the presence of a sharp discontinuity in the plasma flow at about 550,000 km from the nucleus which results in a significant decrease of the plasma flow accompanied by an increase in temperature. The second one is the detection of newly born ions identified as O+ and CO+, at distances from the comet greater than 800,000 km.
Berthelier Jean-Jacques
Dolder U.
Eberhardt Peter
Herrwerth Ingrid
Hodges Richard R.
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