Study on the infrared feature of fractal aggregates

Abstract

Infrared features seen for cometary dust (i.e. 10 micron silicate feature and blackbody continuum) are studied based on the light scattering of fractal aggregates. The shape model of dust is the aggregate composed of mixtures of silicate and carbon materials. The light scattering calculation of fractal aggregates is based on the cluster T-matrix method (Mackowski and Mishchenko,1996) improved by the Grouping and Adding Method (Okada et al, under review) to treat a larger number of monomers.