A multicomponent model of the infrared emission from Comet Halley

Details A multicomponent model of the infrared emission from Comet Halley A multicomponent model of the infrared emission from Comet Halley

Aug 1988

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1988icar...75..351s&link_type=abstract

Icarus (ISSN 0019-1035), vol. 75, Aug. 1988, p. 351-370.

Astronomy and Astrophysics

Astronomy

18

Astronomical Models, Halley'S Comet, Infrared Radiation, Interplanetary Dust, Carbon, Emission Spectra, Grain Size, Mass Ratios, Particle Size Distribution, Silicon, Space Observations (From Earth)

Scientific paper

The 3-200-micron emission of Comet Halley is characterized theoretically by means of numerical simulations. Models with different populations of refractory dust grains are developed, applying compositional and spectral constraints based on ground-based and spacecraft observations. The results are presented in extensive graphs and discussed in detail. Best agreement between predicted and observed Halley emission is obtained for models with 8-40 times more crystalline silicate grains (by mass) than amorphous carbon grains. For the silicate grains, the predominance of large grains and thin carbonaceous coatings are found to account for the lack of a 10-micron silicate feature and the dark appearance of the comet, respectively.

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