Near infrared observations of the dust coma of comet Kohoutek with a tilting-filter Fabry-Perot photometer

Computer Science

Scientific paper

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Cosmic Dust, Fabry-Perot Spectrometers, Filter Wheel Infrared Spectrometers, Kohoutek Comet, Near Infrared Radiation, Attitude (Inclination), Bandpass Filters, Brightness, Coma, Comet Nuclei, Flux (Rate), Infrared Spectrophotometers, Mie Scattering

Scientific paper

By means of narrow band Fabry-Perot filters, which exclude the interference from molecular line fluorescence, the brightness of Comet 1973 f was measured at 8560 and 8748 A. Data reduction on the basis of averaged Mie scattering cross sections indicates that the dust production rate was different before and after perihelion at the same heliocentric distances. This asymmetry suggests that vaporization and dust entrainment were governed by fractionation of a multicomponent mixture of parent molecules in a comparatively porous cometary nucleus.

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