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Collective effects by agglomerated debris particles in the backscatter |
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| Authors: | Evgenij Zubko Yuriy Shkuratov Karri Muinonen Gorden Videen |
| Institution: | aObservatory, University of Helsinki, P.O. Box 14 Kopernikuksentie 1 FIN-00014, Finland bInstitute of Astronomy, Kharkov National University, 35 Sumskaya St., Kharkov 61022, Ukraine cInstitute of Radio Astronomy of National Academy of Sciences of Ukraine, 4 Chervonopraporna St., Kharkov 61002, Ukraine dArmy Research Laboratory AMSRL-CI-EM, 2800 Powder Mill Road, Adelphi Maryland 20783, USA eAstronomical Institute Anton Pannekoek, University of Amsterdam, Kruislaan 403, NL-1098 SJ Amsterdam, Netherlands |
| Abstract: | We present an analysis of backscattered light by agglomerated debris particles whose size is comparable with the wavelength. We consider agglomerates that consist of one or two large central particles and a few relatively small fragments surrounding the particles. We find that for the particles we studied, the attachment of small fragments onto the particles leads to a decrease of the negative polarization branch (NPB) at small phase angles in comparison with the branch produced by the isolated particles. For relatively large agglomerates (with size parameters x about 25) the internal scatter in the agglomerates may produce a secondary minimum of the NPB. In this case the second order of scatter between constituents of aggregates plays the dominant role. |
| Keywords: | Backscatter Agglomerated particles Negative polarization |
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