Plasma-tail activity at the time of the VEGA encounters

Details Plasma-tail activity at the time of the VEGA encounters Plasma-tail activity at the time of the VEGA encounters

Dec 1986

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1986esasp.250c.419n&link_type=abstract

In ESA, Proceedings of the 20th ESLAB Symposium on the Exploration of Halley's Comet. Volume 3: Posters p 419-424 (SEE N87-26714

Astronomy and Astrophysics

Astronomy

Comet Tails, Halley'S Comet, Plasma-Electromagnetic Interaction, Solar Wind, Vega Project, Astronomical Models, Interplanetary Magnetic Fields, Magnetic Field Configurations, Magnetic Field Reconnection

Scientific paper

Physical associations are sought between plasma-tail activity seen in ground-based imagery and near-comet, solar-wind/IMF measurements obtained by the VEGA spacecraft. Emphasis is placed on Disconnection Events (DE's) and on testing the sector boundary/frontside magnetic reconnection model (Niedner and Brandt) of their origin. Strong support for the model comes from two DE's: (1) a major event whose onset, on March 7 - 8, is strongly correlated with a reversal of the comet's magnetic barrier observed by VEGA-1 and VEGA-2 and with an IMF sector boundary observed by VEGA-1; (2) a "minor event" on March 7 which may be associated with the two-polarity (reconnecting?) magnetic barrier seen by VEGA-1 on March 6, when the solar-wind density was low.

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