Astronomy and Astrophysics – Astronomy
Scientific paper
Aug 1991
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1991natur.352..412w&link_type=abstract
Nature (ISSN 0028-0836), vol. 352, Aug. 1, 1991, p. 412-414.
Astronomy and Astrophysics
Astronomy
39
Alkanes, Emission Spectra, Infrared Astronomy, Infrared Radiation, Polyatomic Molecules, Vibrational Spectra, Interstellar Gas, Interstellar Matter, Ultraviolet Radiation
Scientific paper
The vibrational spectrum of the fullerane C60H60 molecule is calculated using a force-field model. Six of the IR active frequencies match unidentified 3-12 micron emission lines seen in a wide variety of astronomical objects in which interstellar or circumstellar gas is illuminated by UV radiation from a star. The calculation suggests why the astronomical feature seen at 7.7 microns is the strongest, and the observed variation of the 3.4 micron and 3.28 micron features with the astrophysical environment is consistent with the idea that the former is attributable to stretching of the C-H bond in heavily hydrogenated fulleranes, whereas the latter is due to the same transition in lightly hydrogenated fulleranes.
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