The disconnection event of 16.0 March 1986 in comet Halley

Details The disconnection event of 16.0 March 1986 in comet Halley The disconnection event of 16.0 March 1986 in comet Halley

Dec 1992

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1992acm..proc..493r&link_type=abstract

In Lunar and Planetary Inst., Asteroids, Comets, Meteors 1991 p 493-495 (SEE N93-19113 06-90)

Physics

Comet Tails, Halley'S Comet, Magnetic Field Reconnection, Explorer 50 Satellite, Interplanetary Magnetic Fields, Kinematics, Solar Wind

Scientific paper

From kinematic extrapolation of tail/nucleus distance measurements on photographic images in the International Halley Watch (IHW) archive, we calculated the disconnection time of the 16-19 March 1986 event to be 16.0 (plus or minus 0.1) March. The solar wind conditions around Comet Halley at the time of the DE, inferred by corotation of IMP-8 satellite data to the comet, were such that (1) Comet Halley had just crossed the interplanetary magnetic field (IMF) sector boundary; (2) the solar wind density was approximately 8 cm-3; (3) the solar wind speed was approximately 600 km/sec; (4) the IMF magnitude was approximately 8 nT. Given these conditions, we conclude that the most likely cause of the 16.0 March DE was front-side magnetic reconnection, as described in the model of Niedner and Brandt (1978).

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