The effect of a sector boundary crossing on the cometary dust tail

Details The effect of a sector boundary crossing on the cometary dust tail The effect of a sector boundary crossing on the cometary dust tail

Jan 1987

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1987em%26p...37...71h&link_type=abstract

Earth, Moon, and Planets (ISSN 0167-9295), vol. 37, Jan. 1987, p. 71-77.

Physics

3

Charge Distribution, Comet Tails, Giotto Mission, Halley'S Comet, Interplanetary Magnetic Fields, Solar Wind, Heavy Ions, Mass Spectra, Particle Density (Concentration), Photoelectric Emission, Radial Velocity, Radiation Pressure, Solar Radiation

Scientific paper

Recognizing that grains in the cometary dust tail are electrically charged, the authors study the effect of an interplanetary sector boundary crossing on their distribution. They specifically consider Halley's comet around the time of encounter by the GIOTTO and VEGA 1 and 2 spacecrafts in March 1986. The smallest dust particles (rg ⪉ 0.3 μm) are strongly effected, and the projection of their distributions in a plane containing the Sun-Comet axis and normal to the orbital plane show a wavy appearance. Also, since reversals in the interplanetary magnetic field occur with a periodicity of 5 to 10 days, the spacecrafts, which follow 3 to 4 days apart are likely to encounter entirely different dust distributions at the lower end of the mass spectrum.

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