A kinematic analysis of the disconnection of the ionic tail of the Comet P/Halley on January 10, 1986

Details A kinematic analysis of the disconnection of the ionic tail of the Comet P/Halley on January 10, 1986 A kinematic analysis of the disconnection of the ionic tail of the Comet P/Halley on January 10, 1986

Jun 1986

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1986crasb.303..147g&link_type=abstract

Academie des Sciences (Paris), Comptes Rendus, Serie II Mecanique, Physique, Chimie, Sciences de l'Univers, Sciences de la Terre

Other

Comet Tails, Halley'S Comet, Plasma Dynamics, Nodes (Standing Waves), Solar Wind, Velocity Distribution

Scientific paper

Photographic images of Halley's Comet tail were analyzed to determine if disconnections of the tail from the comet were due to the crossing of the Comet from one solar magnetic sector to another. The six photographs, taken over a 16 hr period on Jan. 10, 1986, provided detail sufficient for about 1.2753 arcmin accuracy in the Comet ephemerides and the tracks of nodosities at the nucleus and their antisunward movement and separation from the cometary tail. The images depict the simultaneous acceleration of an entire separated tail section region followed by a deceleration of the same section, suggesting that the tail crossed a pre-existing region of interplanetary space. The deceleration to a velocity comparable to the remaining tail took a period of 9 hr. Insufficient data were available for explaining the appearance and behavior of a bar that appeared at the sunward end of the separated nodosity and seemed associated with an influx of solar wind matter as the IMF changed polarity.

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