The dust in the coma of Comet Halley

Details The dust in the coma of Comet Halley The dust in the coma of Comet Halley

Nov 1990

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1990esasp.315..139h&link_type=abstract

In ESA, Formation of Stars and Planets, and the Evolution of the Solar System p 139-142 (SEE N91-18922 10-90)

Astronomy and Astrophysics

Astronomy

Chemical Composition, Cosmic Dust, Halley'S Comet, Mathematical Models, Porosity, Spectral Bands, Astronomical Models, Comet Heads, Comet Nuclei, Comet Tails, Stellar Spectra

Scientific paper

The interstellar dust model of comets is numerically worked out to satisfy several basic constraints provided by observations of Comet Halley and to derive the porosity of coma dust. The observational constraints are the strengths of the 3.4 and 9.7 micrometer emission bands, the ratio of silicates to organic materials, and the mass distribution of the dust. The results indicate that coma dust has a porosity between 0.93 and 0.975. Preliminary calculations concerning the observed linear polarization of comet Halley are presented.

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