Astronomy and Astrophysics – Astronomy
Scientific paper
Sep 1981
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1981icar...47..388m&link_type=abstract
(International Astronomical Union and American Astronomical Society, Colloquium on Comets: Gases, Ices, Grains, and Plasma, 61st
Astronomy and Astrophysics
Astronomy
22
Linear Polarization, Polarimetry, Spectrophotometry, West Comet, Infrared Astronomy, Near Infrared Radiation, Optical Filters, Optical Properties, Silicates, Comets, West (1976Vi) Comet, Optical Properties, Polarimetry, Silicates, Polarization, Wavelengths, Observations, Magnitude, Scattering, Spectrum, Size, Data, Comparisons, Phase Angles, Models, Infrared, Thermal Properties
Scientific paper
Four narrowband filters covering the 440-850 nm wavelengths were used to measure the polarization of the continuum of Comet West 1976 VI. Postperihelion observations indicated wavelength-independent linear polarization in all of the three measurements made, in agreement with other polarization measurements of the comet from the visible to the near-infrared but in contrast with the general tendency in comets toward polarization increase with wavelength. No circular polarization was detected, and it is suggested by (1) the magnitude of polarization as a function of scattering angle, (2) wavelength independence, and (3) infrared and optical photometric properties, that dirty silicates with radii approaching 5 microns may be responsible for the phenomena observed.
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