Quenched carbonaceous composite. III. Comparison to the 3. 29 micron interstellar emission feature

Journal Article · Sun Apr 01 04:00:00 EDT 1990 · Astrophysical Journal; (USA)

DOI:https://doi.org/10.1086/168642· OSTI ID:6770008

Sakata, A; Wada, S; Onaka, T; Tokunaga, A T ^[1]

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1. Univ. of Electro-Communications, Chofu (Japan) Tokyo Univ. (Japan) Hawaii Univ., Honolulu (USA)

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. 31 refs.

• OSTI ID: 6770008
• Journal Information: Astrophysical Journal; (USA), Journal Name: Astrophysical Journal; (USA) Vol. 353; ISSN ASJOA; ISSN 0004-637X
• Country of Publication: United States
• Language: English

Related Subjects

640105* -- Astrophysics & Cosmology-- Galaxies
71 CLASSICAL AND QUANTUM MECHANICS
GENERAL PHYSICS
ABSORPTION SPECTRA
AROMATICS
CHEMICAL COMPOSITION
CHEMISTRY
COSMOCHEMISTRY
EMISSION SPECTRA
HYDROCARBONS
INFRARED SPECTRA
INTERSTELLAR SPACE
ORGANIC COMPOUNDS
POLYCYCLIC AROMATIC HYDROCARBONS
SPACE
SPECTRA