Other
Scientific paper
Dec 1986
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1986esasp.250b..41d&link_type=abstract
In ESA Proceedings of the 20th ESLAB Symposium on the Exploration of Halley's Comet. Volume 2: Dust and Nucleus p 41-45 (SEE N87
Other
1
Characterization, Cosmic Dust, Halley'S Comet, Polarimetry, Albedo, Chemical Composition, Circular Polarization, Comet Nuclei, Space Observations (From Earth)
Scientific paper
Dust in the coma and tail of P/Halley have been characterized by photopolarimetry. The variation in the degree of polarization in the coma with phase angle and with wavelengths is compatible with dust grains made of aggregates of very dark small particles, with an albedo of around 3 - 4%, almost independent of wavelength between 370 and 600 nm. Circular polarization and deflection in the azimuth of polarization were investigated in terms of isotropies in the aggregates. The inner part of the coma close to the nucleus, very bright, produced a polarization which significantly departs from the coma and may involve other kind of particles, not necessary aggregates.
Crussaire Daniel
Dollfus Audouin
Killinger Reiner
Suchail Jean-Luc
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