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

作者：Das H S^*; Das S R; Paul T; Suklabaidya A; Sen A K

来源：Monthly Notices of the Royal Astronomical Society, 2008, 389(2): 787-791.

DOI：10.1111/j.1365-2966.2008.13569.x

• polarization
• scattering
• comets : general
• dust, extinction

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 a(m) = 0.12 mu m and provide excellent results on the maximum and negative degrees of linear polarization at a single wavelength lambda = 0.485 mu m for BCCA aggregates.

• 出版日期2008-9-11