Infrared spectrum of the laboratory-synthesized quenched carbonaceous composite (QCC) - Comparison with the infrared unidentified emission bands

Details Infrared spectrum of the laboratory-synthesized quenched carbonaceous composite (QCC) - Comparison with the infrared unidentified emission bands Infrared spectrum of the laboratory-synthesized quenched carbonaceous composite (QCC) - Comparison with the infrared unidentified emission bands

Dec 1984

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1984apj...287l..51s&link_type=abstract

Astrophysical Journal, Part 2 - Letters to the Editor (ISSN 0004-637X), vol. 287, Dec. 1, 1984, p. L51-L54.

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125

Carbonaceous Materials, Emission Spectra, Infrared Spectra, Interstellar Matter, Infrared Absorption, Temperature Dependence

Scientific paper

Infrared spectra (2.5-25 microns) of the experimentally synthesized quenched carbonaceous composite (QCC), which has been shown to be a likely candidate for the interstellar 220 nm extinction hump, are presented. QCC is shown to have infrared bands at 3.29, 3.42, 3.48, 6.25, 6.94, 7.27, 11.40, 11.96, and 13.24 microns. The spectrum taken after heating the QCC sample to 773 K shows that only the 6.25 and 11.40 microns features survive and the other features almost disappear at that temperature. The infrared absorption features in QCC are in good agreement with six of the nine infrared unidentified emission bands observed in celestial objects. In particular, the QCC sample after heating at 773 K is the first actual substance which shows features only around 6.2 and 11.3 microns. These results support theoretical indications that the source material for the most observed features is carbonaceous.

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