Amorphous carbon and the unidentified infrared bands

Details Amorphous carbon and the unidentified infrared bands Amorphous carbon and the unidentified infrared bands

Mar 1987

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1987apj...314..422b&link_type=abstract

Astrophysical Journal, Part 1 (ISSN 0004-637X), vol. 314, March 1, 1987, p. 422-428. Research supported by the Ministero della P

Astronomy and Astrophysics

Astronomy

92

Amorphous Materials, Carbon, Infrared Spectra, Interstellar Matter, Absorption Spectra, Hydrocarbons, Infrared Astronomy, Planetary Nebulae

Scientific paper

The authors present the absorption spectra of submicron amorphous carbon (AC) particles taken at room temperature and at three different higher temperatures in vacuum: 100°C, 260°C, and 400°C. The data show the presence of six bands which fit well the unidentified infrared emission bands (UIR) observed in space, i.e., 3.4, 3.51, 5.78, 6.29, 6.85, and 11.3 μm. The other three astronomical bands at 3.28, 7.7, and 8.6 μm are lacking. These data are compared with the bands expected from polycyclic aromatic hydrocarbons (PAHs). This comparison suggests that UIR bands may be explained as produced by a collection of both amorphous carbon and PAHs coexisting in space.

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