Albedo and color of dust grains: Laboratory versus cometary results

Details Albedo and color of dust grains: Laboratory versus cometary results Albedo and color of dust grains: Laboratory versus cometary results

Dec 1986

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1986esasp.250b..53g&link_type=abstract

In ESA Proceedings of the 20th ESLAB Symposium on the Exploration of Halley's Comet. Volume 2: Dust and Nucleus p 53-57 (SEE N87

Physics

Albedo, Color, Cosmic Dust, Halley'S Comet, Light Scattering, Absorption Cross Sections, Microwave Scattering, Mie Scattering, S Matrix Theory

Scientific paper

Large dust grains (1 - 100 μm) contribute considerably (≡50%) to the total surface area of cometary dust producing light scattering in the coma. Referring to laboratory results (laser and microwave scattering experiments) it is shown, that absorbing irregular and fluffy dust grains can have low (⪉0.05) geometric albedos and that they can produce colour effects, which have to be taken into account in any interpretation of photometric Halley measurements. Therefore modelling exclusively by Mie theory is dangerous, since the scattering properties of large irregular particles deviate from that of smooth spheres.

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