A kick from the solar wind as the cause of Comet Halley's February 1991 flare

Details A kick from the solar wind as the cause of Comet Halley's February 1991 flare A kick from the solar wind as the cause of Comet Halley's February 1991 flare

Oct 1991

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1991natur.353..407i&link_type=abstract

Nature (ISSN 0028-0836), vol. 353, Oct. 3, 1991, p. 407-409.

Physics

18

Cometary Atmospheres, Halley'S Comet, Shock Wave Interaction, Solar Activity Effects, Solar Wind, Comet Nuclei, Corotation, H Alpha Line, Interplanetary Medium, Magnetohydrodynamics

Scientific paper

It is suggested here that a shock wave generated by a solar flare and propagating through the interplanetary medium could have caused the large flare that Comet Halley produced on February 12, 1991, when it was 14.3 AU from the sun and 18 deg below the ecliptic plane. It is shown that a solar flare on January 31 could plausibly have produced a shock wave that would have reached Halley on February 12, and would have been sufficiently strong to crack the comet's crust of fluffy ice.

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