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Tenth Conference on Electromagnetic and Light Scattering
June, 17-22, 2007, Bodrum, Turkey

DOI: 10.1615/ICHMT.2007.ConfElectromagLigScat


ISBN Print: 978-1-56700-244-7

Circular and linear polarization of comet C/2001 Q4 (NEAT). Why circular polarization in comets is predominantly left-handed?

pages 181-184
DOI: 10.1615/ICHMT.2007.ConfElectromagLigScat.480
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摘要

We present the results of new polarimetric observations of comet C/2001 Q4 (NEAT). Measurements of circular and linear polarization were made with the 2.6-m Shain telescope of the Crimean Astrophysical Observatory on May 21-23, 2004. A significant correlation between variations of circular and linear polarization measured along the cuts through the coma and nucleus of the comet was found. It means that single scattering of light on aligned non-spherical dust particles can produce circular as well as linear polarization. We call particular attention to the fact that the measured circular polarization in four comets, lP/Halley, C/1995 01 (Hale-Bopp), D/1999 S4 (LINEAR) and C/2001 Q4 (NEAT), was predominately left-handed. This question is discussed in the frame of light scattering by optically active organic particles.

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