Polarization images of the inner regions of Comet Halley

Details Polarization images of the inner regions of Comet Halley Polarization images of the inner regions of Comet Halley

Nov 1988

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1988icar...76..270e&link_type=abstract

Icarus (ISSN 0019-1035), vol. 76, Nov. 1988, p. 270-278.

Physics

32

Comet Nuclei, Halley'S Comet, Polarized Radiation, Charge Coupled Devices, Cosmic Dust, Emission Spectra, Particle Size Distribution, Radiant Flux Density, Refractivity

Scientific paper

The present CCD polarimeter images of intensity and polarization within the near-nucleus regions of Comet Halley show the occurrence of dust jets on two days in January, 1986, which exhibit increased polarizations above the level of the surrounding coma. Three possible reasons for the enhanced polarization in the jets are considered, assuming that the polarization increase is due to dust grains: (1) the size distribution of the grains could be different from the surrounding coma; (2) the material of the grains could have a different refractive index; and (3) the ratio of dust to gas emission could be different in the jets.

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