Polarimetry of comets - A review

Details Polarimetry of comets - A review Polarimetry of comets - A review

Feb 1986

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1986em%26p...34..189d&link_type=abstract

Earth, Moon, and Planets (ISSN 0167-9295), vol. 34, Feb. 1986, p. 189-200.

Computer Science

Sound

24

Comets, Halley'S Comet, Polarimetry, High Resolution, Polarized Light, Wavelengths

Scientific paper

The available polarimetric observations on comets are analyzed to facilitate planning for, and interpretation of, future polarimetric sounding of Comet Halley by the flyby probes. A division of comets into 'gaseous' and 'dusty' on a polarimetric basis is revealed. The results of the phase dependence and wave dependence of polarization are discussed. The curve describing polarization as a function of phase angle goes through a maximum at 90 deg and through a minimum at low (below 20 deg) phase angles. The chief peculiarity of this dependence is the fact that, after falling to a zero value at 20 deg, polarization continues to decrease until reaching a negative minimum value, then rises to a value of zero at the phase angle of 0 deg. Negative results of attempts to detect elliptical polarization are given consideration. New observational problems arising from the evidence of negative polarization at small phase angles and by the recently discovered 'opposition effect' are discussed.

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