An unusual interplanetary event - Encounter with a comet?

Details An unusual interplanetary event - Encounter with a comet? An unusual interplanetary event - Encounter with a comet?

Oct 1983

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1983natur.305..612r&link_type=abstract

Nature (ISSN 0028-0836), vol. 305, Oct. 13, 1983, p. 612-615.

Computer Science

15

Comets, Interplanetary Magnetic Fields, Magnetic Flux, Planetary Magnetic Fields, Venus (Planet), Current Sheets, Encounters, International Sun Earth Explorer 3, Magnetosheath, Pioneer Venus Spacecraft, Comets, Pioneer Venus, Magnetic Fields, Magnitude, Magnetic Properties, Current Sheets, Comparisons, Amplitude, Observations, Spectra, Diagrams

Scientific paper

The possibility that the slow rise to a sharp maximum and then decay surrounding a strong current sheet observed in the Venus magnetic field 0.72 AU from the sun was caused by passage of Venus through the wake of an active comet is examined. Data were also gathered by the ISEE 3 satellite magnetometer at 0.99 AU 25 h, 20 min later, a delay corresponding to the transit time for the solar wind. No shock structures bounded the phenomenon. The data indicate the presence of a small body in a much larger field of interaction and the magnetometer, solar wind probe, and electron temperature probe support a behavior similar to a planetary magnetosheath. The observed He structure in interplanetary space ruled out a solar wind source, while consideration of the magnetic equator and magnetic pole suggest that an unknown comet passed through the region between the sun and Venus at a distance where the effects would not be detected at earth.

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