期刊
JOURNAL OF QUANTITATIVE SPECTROSCOPY & RADIATIVE TRANSFER
卷 106, 期 1-3, 页码 63-73出版社
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.jqsrt.2007.01.006
关键词
circular polarization; asymmetrical particles; single scattering; comets
We present calculations of the degree of circular polarization of light singly scattered by some kinds of asymmetrical particles in random orientation as a function of the scattering angle, using the T-matrix method. To clarify the possible contribution of asymmetry of particles to circular polarization we considered aggregates of optically inactive homogeneous identical spheres. We analysed the effect of changing the size of the monomers and the refractive index. We also performed calculations for two different geometries. The values of the computed degree of circular polarization are generally in the range of the observed ones for light scattered by dust particles in comets P/Halley, C/1995 O1 (Hale-Bopp) and C/1999 S4 (LINEAR), in the interplanetary medium and in the interstellar medium of our galaxy. (C) 2007 Elsevier Ltd. All rights reserved.
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