Other
Scientific paper
Jul 1981
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1981mnras.196..269d&link_type=abstract
Monthly Notices of the Royal Astronomical Society, vol. 196, July 1981, p. 269-274. Research supported by the Science Research
Other
342
Astronomical Spectroscopy, Cosmic Dust, Hydrocarbons, Infrared Spectra, Interstellar Matter, Molecular Clouds, Absorption Spectra, Aromatic Compounds, Astronomical Models, Carbon, Chemical Bonds, Crystal Structure, Emission Spectra, Infrared Absorption
Scientific paper
A variety of chemical functional groups will be bound at reactive surface sites on small carbon grains in the diffuse interstellar medium. These groups give rise to infrared spectral features characteristic of aromatic molecules. In diffuse clouds the dominant group appears to be -CH3. When carbon grains are heated in emission objects aromatic CH groups are produced. It is shown that both the absorption and emission spectra of dust can be understood in terms of the existence of these and other simple functional groups combined with carbon at grain surfaces. Specific identifications are proposed for several absorption and emission features including the 3.4 micron absorption band and the 3.3 micron emission feature.
Duley Walter W.
Williams David. A.
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