Journal Article

Aggregate model of cometary dust: an application to comet Levy 1990XX

H. S. Das, S. R. Das, T. Paul, A. Suklabaidya and A. K. Sen

in Monthly Notices of the Royal Astronomical Society

Published on behalf of The Royal Astronomical Society

Volume 389, issue 2, pages 787-791
Published in print September 2008 | ISSN: 0035-8711
Published online September 2008 | e-ISSN: 1365-2966 | DOI:
Aggregate model of cometary dust: an application to comet Levy 1990XX

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In the present work, the light-scattering properties of comet Levy 1990XX are studied through simulations using Ballistic Particle-Cluster Aggregation (BPCA) or Ballistic Cluster–Cluster Aggregation (BCCA) aggregates of up to 128 spherical monomers of different compositions (e.g. silicates, carbonaceous materials etc.) and the best-fitting theoretical polarization curve is generated using the Superposition T-matrix code. The best-fitting refractive indices coming out from the present analysis show silicate behaviour when monomer radius is am= 0.12 μm and provide excellent results on the maximum and negative degrees of linear polarization at a single wavelength λ= 0.485 μm for BCCA aggregates.

Keywords: polarization; scattering; comets: general; dust, extinction

Journal Article.  3444 words.  Illustrated.

Subjects: Astronomy and Astrophysics

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