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Circular polarization of light scattered by randomly built aggregates

DOI: 10.1615/ICHMT.2007.ConfElectromagLigScat.140
pages 45-48

D. Guirado
Institute de Astrofisica de Andalucia (CSIC), Cmo. Bajo de Huétor, 50, Granada, 18008, Spain; Astronomical Institute "Anton Pannekoek", University of Amsterdam, Kruislaan403, 1098 SJ Amsterdam, The Netherlands

F. Moreno
Grupo de Óptica. Departamento de Fisica Aplicada. Universidad de Cantabria

Joop W. Hovenier
Astronomical Institute "Anton Pannekoek", University of Amsterdam, Kruislaan403, 1098 SJ Amsterdam, The Netherlands

Résumé

We present calculations of the scattering angle dependence of the degree of circular polarization of light singly scattered at 500 nm by randomly oriented randomly built aggregates of optically inactive homogeneous identical spheres. Using the T-matrix method we analyzed the effect of changing the size of the monomers for two different geometries. The values of the computed degree of circular polarization are comparable to the observed ones for light scattered by dust particles in comets P/Halley, C/1995 O1 (Hale-Bopp) and C/1999 S4 (LINEAR).

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