Interplanetary dust dynamics III. Dust released from P/Encke: Distribution with respect to the zodiacal cloud

Details Interplanetary dust dynamics III. Dust released from P/Encke: Distribution with respect to the zodiacal cloud Interplanetary dust dynamics III. Dust released from P/Encke: Distribution with respect to the zodiacal cloud

Dec 1987

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1987icar...72..582g&link_type=abstract

Icarus, Volume 72, Issue 3, p. 582-592.

Computer Science

14

Scientific paper

Numerical simulations of the trajectories of over 200 30-μm-radius dust particles released by Comet P/Encke were designed to study the evolution and redistribution of orbital elements as the dust particles spiral in toward the Sun. The dust assumes Jupiter crossing orbits immediately after release due to radiation pressure, while the comet's orbit remains inside Jupiter's orbital path. By the time the dust particles have spiraled past Jupiter, information on their origin from P/Encke is erased from the distribution in orbital elements. The primary objective of this study is to compare the observed spatial distribution of zodiacal/interplanetary dust with that of the model cloud inside Jupiter's orbit. The observed location of the plane of maximum dust density ``symmetry plane'' of the zodiacal cloud is compared to a least-square-fit plane of the model cloud. A clear correlation between the two planes is found. The variation of the observed inclination and nodes with heliocentric distance agrees also, at least qualitatively, with that found in the model cloud. The hypothesis that short-period comets may have contributed in a major way to the zodiacal cloud is compatible with these results. The study is directly relevant to, and supports, Whipple's suggestion that Comet P/Encke may have been a major source to the zodiacal cloud.

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