Evidence for the field line reconnection process in the particle and magnetic field measurements obtained during the Giotto-Halley encounter

Details Evidence for the field line reconnection process in the particle and magnetic field measurements obtained during the Giotto-Halley encounter Evidence for the field line reconnection process in the particle and magnetic field measurements obtained during the Giotto-Halley encounter

Apr 1989

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1989angeo...7..107k&link_type=abstract

Annales Geophysicae (ISSN 0980-8752), vol. 7, April 1989, p. 107-113. Research supported by the Max-Planck Gesellschaft zur Foer

Physics

12

Giotto Mission, Halley'S Comet, Magnetic Field Configurations, Magnetic Field Reconnection, Magnetic Flux, Comet Tails, Cometary Magnetospheres, Particle Density (Concentration), Comets, Giotto Mission, Halley, Charged Particles, Magnetic Fields, Flux, Spacecraft Observations, Rpa Instrument, Epa Instrument, Mag Instrument, Energy, Time Scale, Ions, Electrons, Acceleration, Diagrams, Hypotheses, Magnetic Fields, Cometosheath, Comparisons

Scientific paper

Measurements of low and high energy particles, as well as the magnetic field obtained by three different instruments during the Giotto-Halley encounter on March 13, 14, 1986 are used to study the field-line merging process. Spikes of 5-15 min duration in the high energy particle flux which are superimposed on the general intensity time profile are correlated with minima in the low energy particle flux and time periods of oppositely directed magnetic field lines. Strong changes in the pitch angle distribution of energetic ions are observed simultaneously. The observations are considered as evidence for sporadic field line merging processes in the front side of Halley's cometosheath which can accelerate ions and electrons up to E of about 300 keV.

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