A model of the 2-4 micron spectrum of Comet Halley

Details A model of the 2-4 micron spectrum of Comet Halley A model of the 2-4 micron spectrum of Comet Halley

Nov 1986

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1986em%26p...36..295w&link_type=abstract

Earth, Moon, and Planets (ISSN 0167-9295), vol. 36, Nov. 1986, p. 295-299.

Astronomy and Astrophysics

Astronomy

9

Absorption Spectra, Cometary Atmospheres, Halley'S Comet, Microwave Spectra, Astronomical Models, Bacteria, Emission Spectra, Interstellar Matter, Scattering Cross Sections

Scientific paper

An analysis of observations of Comet Halley made on March 31, 1986 shows a broad absorption band centered at 3.4-microns wavelength, and the emission feature is explained using a bacterial grain model. Of the order of a single day's dust production from the nucleus seems to be involved in determining the detailed absorption profile near 3.4 microns. The shape of the profile seems variable day-to-day, suggesting an in situ break-up of grains giving rise to gaseous organic molecules that contribute in a variable way to fine structure within the 3.4-micron band.

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