Ion composition and dynamics at comet Halley

Details Ion composition and dynamics at comet Halley Ion composition and dynamics at comet Halley

May 1986

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1986natur.321..330b&link_type=abstract

Nature (ISSN 0028-0836), vol. 321, May 15, 1986, p. 330-334. NASA-BMFT-SNSF-supported research.

Computer Science

277

Abundance, Giotto Mission, Halley'S Comet, Ion Distribution, Mass Spectroscopy, Coma, Ion Density (Concentration), Ion Temperature, Plasma Dynamics, Plasma Interactions, Solar Wind, Comets, Halley, Spacecraft Observations, Mission Description, Experiments, Ions, Composition, Dynamics, Giotto, Ion Mass Spectrometer, Velocity, Ims, Distribution, Distance, Comae, Hydrogen, Helium, Formation, Flow, Concentration, Temperature, Density, Abundance, Carbon, Nitrogen, His, Plasma, Solar Wind, Interaction, Hers, Para

Scientific paper

The ion mass spectrometer aboard the Giotto spacecraft measured the composition and velocity distributions of cometary ions at distances of ≡7.5x106 to ≡1,300 km from the nucleus of comet Halley. Well outside the bow shock, pick-up cometary H+ ions were found. Heavier ions (C+, H2O+-group, CO+ and S+) have been identified at ≤3x105km. Solar-wind He2+ was found throughout the coma to as close as ≡5,000 km; He+ produced by charge exchange was seen inside ≡2x105km. Deeper within the coma the main cometary hot-ion species identified were H+, H2+, C+, O+, OH+, H2O+, H3O+, CO+ and S+.

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