Computer Science
Scientific paper
Jul 1990
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1990icar...86..257m&link_type=abstract
Icarus (ISSN 0019-1035), vol. 86, July 1990, p. 257-263.
Computer Science
9
Backscattering, Comets, Photointerpretation, Polarimetry, Polarization Characteristics, Surface Roughness Effects, Cometary Atmospheres, Halley'S Comet, Mie Scattering, Comets, Photopolarimetry, Analysis, Surface, Roughness, Scattering, Grains, Reflection, Particles, Diagrams, Calculations
Scientific paper
A comparison of cometary rough surface scattering model calculation results with observations has indicated that negative polarization is produced, over a phase-angle range of less than 20 deg, by the variation of polarization angle of reflected light due to a contribution from (1) different sites on large, rough particles, and/or (2) multiple internal reflection within small dielectric particles. The opposition effect in cometary comas is caused by large, rough particle reflection. The mixing model for cometary grains, encompassing small particles and large rough ones composed in both cases of slightly absorbing material, is seen as explaining the photopolarimetric data of comets in the backward-scattering region.
Mukai Sadaatsu
Mukai Tadashi
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