Comparison of energetic ion measurements at Comets Giacobini-Zinner and Halley

Details Comparison of energetic ion measurements at Comets Giacobini-Zinner and Halley Comparison of energetic ion measurements at Comets Giacobini-Zinner and Halley

Dec 1986

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1986esasp.250c.179d&link_type=abstract

In ESA, Proceedings of the 20th ESLAB Symposium on the Exploration of Halley's Comet. Volume 3: Posters p 179-183 (SEE N87-26714

Computer Science

Energetic Particles, Giacobini-Zinner Comet, Halley'S Comet, Particle Telescopes, Space Plasmas, Bow Waves, Cometary Atmospheres, Giotto Mission, International Sun Earth Explorer 3, Plasma-Particle Interactions, Solar Wind, Spatial Distribution

Scientific paper

Similar energetic particle detectors on board ICE and Giotto measured high count rates of ions of cometary origin several million km away from the comets. The EPAS instrument on ICE, sensitive to protons of energy >35 keV, or oxygen ions of energy >65 keV, encountered pick-up ions from over 106km prior to closest approach to Giacobini-Zinner, to over 4×106km afterwards. The EPONA experiment on Giotto can detect protons of energy >26 keV, or H2O+ ions of energy >60 keV. Pick-up ions were measured from at least 7.5×106km from Halley. The major difference between the two encounter trajectories is that ICE flew on the anti-sunward side at 7800 km from G-Z, while Giotto approached to 600 km on the sunward side of Halley. Profiles of the ion intensities for the two fly-bys are compared in similar format, allowing a rapid examination of their similarities and differences.

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