title: Effect of the orientation of the optic axis on simulated scattering matrix elements of small birefringent particles.
abstract: We study how the orientation of the optic axis affects single-scattering properties for small, birefringent calcite particles simulated using DDSCAT 7.1.1. We consider two irregular model particles, a flake and a rhomboid, in either a (i) fixed or (ii) random orientation. Simulations are performed for three volume-equivalent radii of 0.1, 0.45, and 1.0 μm. For each target, we repeat the computations for three sets of orientations of the optic axis. When a fixed spatial orientation of the target is considered, the simulations are significantly affected by the orientation of the optic axis. However, the effect is considerably weaker when assuming the same targets in random spatial orientation.
authors.affiliation: Instituto de Astrofísica de Andalucía, CSIC Glorieta de la Astronomía s/n, Granada, Spain. dominika@iaa.es
authors.forename: Dominika D
authors.initials: DD
authors.lastname: Dabrowska
authors.forename: Olga
authors.initials: O
authors.lastname: Muñoz
authors.forename: Fernando
authors.initials: F
authors.lastname: Moreno
authors.forename: Timo
authors.initials: T
authors.lastname: Nousiainen
authors.forename: Evgenij
authors.initials: E
authors.lastname: Zubko