Astronomy and Astrophysics – Astrophysics
Scientific paper
Sep 1976
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1976ap%26ss..43..337d&link_type=abstract
Astrophysics and Space Science, vol. 43, Sept. 1976, p. 337-354. Translation.
Astronomy and Astrophysics
Astrophysics
8
Circular Polarization, Cosmic Dust, Interstellar Gas, Light Scattering, Optical Activity, Polarized Light, Spatial Distribution
Scientific paper
Light scattering by particles of arbitrary sizes and various shapes is analyzed using the Rayleigh-Gans approach, where the probability of secondary scattering within a particle is negligibly small. Stokes parameters are calculated for radiation scattered by anisotropic particles, representing either interstellar dust grains or molecules. Mechanisms are examined which can effectively transform linearly polarized radiation into circularly polarized radiation during scattering by randomly oriented anisotropic particles. It is shown that the optical activity of irregularly shaped dust grains may be very large, even if they consist of inactive and isotropic materials.
Dolginov Arkady Z.
Silant'ev N. A.
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