Astronomy and Astrophysics – Astrophysics
Scientific paper
Apr 1990
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1990apj...353..543s&link_type=abstract
Astrophysical Journal, Part 1 (ISSN 0004-637X), vol. 353, April 20, 1990, p. 543-548.
Astronomy and Astrophysics
Astrophysics
32
Cyclic Hydrocarbons, Emission Spectra, Infrared Spectra, Interstellar Matter, Aromatic Compounds, Line Spectra, Spectrum Analysis
Scientific paper
Laboratory data are presented showing that oxidized f-QCC, after heating to 500 C, has a 3.29 micron absorption feature that matches precisely the wavelength of the 3.29 micron interstellar emission feature. In addition, the width of the f-QCC (filmy quenched carbonaceous composite) feature is close to that of the 3.29 micron emission feature observed in NGC 7027, Orion, and IRAS 21282 + 5050. Laboratory spectra of polycyclic aromatic hydrocarbons (PAHs) were also obtained, and comparison of the f-QCC and PAH absorption spectra to that of the 3.29 micron emission feature indicates that the f-QCC provides a much better match. It is thus suggested that f-QCC is representative of the class of material giving rise to the emission features in the interstellar medium.
Onaka Takashi
Sakata Ayaka
Tokunaga Alan T.
Wada Shohei
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