Effect of the heliospheric neutral sheet to the kinked ion tail of Comet Halley on 13 May 1910

Details Effect of the heliospheric neutral sheet to the kinked ion tail of Comet Halley on 13 May 1910 Effect of the heliospheric neutral sheet to the kinked ion tail of Comet Halley on 13 May 1910

Dec 1986

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1986esasp.250a.135s&link_type=abstract

In ESA Proceedings of the 20th ESLAB Symposium on the Exploration of Halley's Comet. Volume 1: Plasma and Gas p 135-140 (SEE N87

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1

Comet Tails, Halley'S Comet, Heliosphere, Neutral Sheets, Solar Activity Effects, Solar Cycles, Astronomical Photography, Japanese Spacecraft, Solar Wind, Twenty-Seven Day Variation

Scientific paper

Surveying 26 plates of comet Halley during the apparition in 1910, the ion tail with a distinct kink on May 13 is concluded to be one of the most specific events throughout the last apparition. The heliosphere was deduced from the analysis of its solar cycle variation to be in excursion phase. From the analysis of 27-day recurrence time pattern of geomagnetic activity index C9 during 1909-1911, the inclination and the position of the heliospheric neutral sheet on the day is obtained and expressed on the two-hemisphere diagram. Superposition of the Earth and the comet on the diagram reveals that the comet was just on the neutral sheet on 13 May 1910. Considering the observation by Sakigake on the deflection of the solar wind near the neutral sheet, it is concluded that the kink of the ion tail is caused by a sector boundary crossing. The sector boundary-ion tail interaction is also studied for two other cometary cases of Bennett, and Tomita-Gerber-Honda.

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