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The Motion of Interplanetary Dust Particles

Published online by Cambridge University Press:  12 April 2016

I.R. East  and
N.K. Reay
I.R. East
Affiliation:
Astronomy Group, Department of Physics, Blackett Laboratory, Imperial College, Prince Consort Road, LONDON SW7 2BZ, ENGLAND
N.K. Reay
Affiliation:
Astronomy Group, Department of Physics, Blackett Laboratory, Imperial College, Prince Consort Road, LONDON SW7 2BZ, ENGLAND

Abstract

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Radial velocity measurements on the solar MgI 5183.618Å Fraunhofer absorption line in the Zodiacal Light spectrum have been made with a microprocessor-controlled servo-stabilised Fabry-Perot interferometer. Observations were made at 5 and 10 degree intervals in the ecliptic plane between morning and evening elongations of 25 degrees. These new data are of much greater precision and coverage than any previously obtained. Obtained over a two year period, the observations show a consistent evening/morning asymmetry in the radial velocity curve with the Gegenschein receding from the Earth at 4 Km/sec. These data do not support the hypothesis that the majority of interplanetary dust grains are in hyperbolic trajectories.

Type
I. Zodiacal Light and F-Corona: Observations
Information
International Astronomical Union Colloquium , Volume 85: Properties and Interactions of Interplanetary Dust , 1985 , pp. 81 - 84
Copyright
Copyright © Reidel 1985

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