Modeling Porous Dust Grains with Ballistic Aggregates. I. Geometry and Optical Properties
Modeling Porous Dust Grains with Ballistic Aggregates. I. Geometry and Optical Properties
We investigate the scattering and absorption of light by random ballistic aggregates of spherical monomers. We present a general measure for the porosity of an irregular particle. Three different classes of ballistic aggregates are considered, with different degrees of porosity. Scattering and absorption cross sections are calculated, using the discrete …