First results from the Giotto magnetometer experiment at comet Halley

Details First results from the Giotto magnetometer experiment at comet Halley First results from the Giotto magnetometer experiment at comet Halley

May 1986

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1986natur.321..352n&link_type=abstract

Nature (ISSN 0028-0836), vol. 321, May 15, 1986, p. 352-355.

Computer Science

214

Cometary Atmospheres, Giotto Mission, Halley'S Comet, Interplanetary Magnetic Fields, Magnetometers, Solar Wind, Bow Waves, Cometary Magnetospheres, Magnetic Flux, Magnetosheath, Plasma Interactions, Satellite-Borne Instruments, Shock Waves, Spatial Distribution, Comets, Halley, Spacecraft Observations, Mission Description, Experiments, Magnetometer, Mag, Giotto, Magnetic Fields, Interaction, Solar Wind, Plasma, Atmosphere, Waves, Upstream, Distance, Bow Shock, Turbulence, Magnetosheath, Diagrams, Compariso

Scientific paper

The Giotto magnetometer experiment at comet Halley has for the first time provided magnetic field measurements in all the important spatial regions characterizing the front-side interaction between the solar-wind magnetoplasma and a cometary atmosphere. Upstream waves of cometary origin have been observed at distances greater than two million km from the comet, both inbound and outbound. A cometary bow shock has been identified at 1.15 million inbound on the dawn side and a thick quasi-parallel cometary bow shock outbound. A turbulent magnetosheath has been observed further inside. A magnetic pile-up region has been identified inside 135,000 km, inbound, and 263,000 km, outbound, with fields up to 57 and 65 nT, respectively. A cavity region with essentially zero magnetic field has been discovered, with a width of 8500 km along the trajectory around closest approach.

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