Evolution on large-scale plasma structures in comets: Kinematics and physics

Details Evolution on large-scale plasma structures in comets: Kinematics and physics Evolution on large-scale plasma structures in comets: Kinematics and physics

Oct 1991

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1991plas.rept...19b&link_type=abstract

In NASA, Washington, Reports of Planetary Astronomy, 1991 p 19-20 (SEE N92-12792 03-89)

Physics

Comet Tails, Comets, Kinematics, Magnetic Field Reconnection, Planetary Magnetotails, Solar Wind, Data Bases, Explorer 50 Satellite, Plasmas (Physics), Polarity, Wind Direction, Wind Velocity

Scientific paper

The disconnection event (DE) consists of the periodic loss of a comet's entire plasma tail and the growth of a new one. This spectacular phenomenon is not understood. The strategy was to assemble a data base of specific events studied in detail, determine the solar wind conditions responsible for DEs, and develop a consistent physical model. Analysis is complete for the sequence of DEs that took place during 13 to 18 April 1986. The first DE correlates well with a sector boundary crossing for the comet and a group of DEs that occurred approximately a day later could have produced by polarity reversals seen in the IMP-8 data. Thus, these DEs are consistent with the frontside, magnetic reconnection mechanism.

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