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On the Bimodal Nature of the Particle-Size-Distribution Function of Cometary Dust

Published online by Cambridge University Press:  12 April 2016

C.P. Liu  and
H. Kimura
C.P. Liu
Affiliation:
Max-Planck-Institut für Aeronomie, D-3411 Katlenburg-Lindau, Federal Republic of Germany
H. Kimura
Affiliation:
Max-Planck-Institut für Aeronomie, D-3411 Katlenburg-Lindau, Federal Republic of Germany

Abstract

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The bimodal nature of distribution function f(γ) is confirmed by analysing the optical isophotal maps of comets Kohoutek 1973 XII and Bennett 1970 II. Extending the dynamic analysis to the infra-red data of two comets, Kohoutek 1973 XII and IRAS-Araki-Alcock 1983 d, we demonstrate that the secondary component f2(γ), which dominates in the range of large particles, plays a much more important role in emitting the thermal radiation (IR) than in the case of light scattering (optical). The relative weight of two components, measured by their height ratio, g2/g1, should be increased by a factor of about 20, in order to obtain a good fitting to the infra-red data.

Type
V. Relationships to Comets and Meteoroids
Information
International Astronomical Union Colloquium , Volume 85: Properties and Interactions of Interplanetary Dust , 1985 , pp. 279 - 282
Copyright
Copyright © Reidel 1985

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