Porosity and ice-dust mixtures in cometary particles

Details Porosity and ice-dust mixtures in cometary particles Porosity and ice-dust mixtures in cometary particles

Dec 1989

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1989esasp.302..209l&link_type=abstract

In ESA, Physics and Mechanics of Cometary Materials p 209-213 (SEE N90-19989 12-90)

Physics

Comet Nuclei, Cometary Atmospheres, Comets, Interplanetary Dust, Polarized Light, Porosity, Albedo, Ice, Sunlight

Scientific paper

From numerous and consistent observations of light scattered by cometary dust, the degree of linear polarization as a function of the phase angle, and the bulk geometric albedo are accurately derived. The derived values are typical of rough pitted or aggregated textures. The decay with decreasing solar distance of interplanetary grains spiralling towards the Sun may be a clue to the thermal evolution of the coating which aggregates the cometary grains. The results indicate some break off of the clumps of grains, some loss of organic mantles by heating and the existence of various populations of dust particles.

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