Astronomy and Astrophysics – Astronomy
Scientific paper
Jun 1992
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1992em%26p...57..213d&link_type=abstract
Earth, Moon, and Planets (ISSN 0167-9295), vol. 57, no. 3, June 1992, p. 213-223.
Astronomy and Astrophysics
Astronomy
6
Astronomical Polarimetry, Circular Polarization, Metal Powder, Planetary Surfaces, Remote Sensing, Asteroids, Light Scattering, Polarimeters, Regolith
Scientific paper
After obtaining phase dependencies of circular polarization with a precision Stokes polarimeter for dielectric and metallic powders, it was determined that the change of circular polarization with phase angle V is strongly dependent on surface structure. Measurements of compacted powders show curves which change in sign repeatedly, and have additional maxima. A theory is presented in which circular polarization is seen as a result of multiple light reflections from a particle surface. The theory furnishes reasonable fits to experimental data; it is concluded that circular polarization measurements can be used to find metals in the surfaces of such bodies as asteroids, as well as to ascertain surface structure features.
Degtiarev V. S.
Kolokolova L. O.
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