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On The Gegenschein and the Symmetry Plane

Published online by Cambridge University Press:  12 April 2016

S. S. Hong  and
S. M. Kwon
S. S. Hong
Affiliation:
Department of Astronomy, Seoul National University, 151-742, Korea
S. M. Kwon
Affiliation:
Department of Astronomy, Seoul National University, 151-742, Korea

Abstract

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Using 3-dim density models of the zodiacal cloud, we have calculated brightness of the zodiacal light over an extended region around the anti-solar point. The isophotal contours of the model Gegenscheins differ from each other, morphologically, to the degree that they can differentiate the competing density models. The recently reduced Gegenschein observations of 2° resolution clearly favour the ellipsoid-type models to the fan-types, and also suggest that the surface of the densest dust concentration in the outer part of the cloud has its ascending node at longitude 100 ± 20° and is inclined 2 ± 0°.5 with respect to the ecliptic plane.

Type
Interplanetary Dust: Zodiacal Light and Optical Studies
Information
International Astronomical Union Colloquium , Volume 126: Origin and Evolution of Interplanetary Dust , 1991 , pp. 147 - 150
Copyright
Copyright © Kluwer 1991

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