Optical properties of dust grains |
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| Authors: | O M Shalabia M El Shalaby M S El-Nawawy |
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| Institution: | 1. Astronomy Department, Cairo University, Faculty of Science, Cairo, Egypt
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| Abstract: | In this paper we present new and exact analytical and computational developments of Güttler's formulae for composite grains, thereafter applied for the two models:| (1) |
Graphite core-ice mantle.
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Silicate core-ice mantle.
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Literal and analytical expressions have been established for the Riccati-Bessel of the complex functions 
n
, 
n
, and 
n
and their derivatives. The problem is treated in its general form without any restriction and the computer programme is now ready for request. |
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| Keywords: | |
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