The influence of temperature on the infrared spectrum of the coronene molecule

Details The influence of temperature on the infrared spectrum of the coronene molecule The influence of temperature on the infrared spectrum of the coronene molecule

Aug 1989

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1989a%26a...220..245b&link_type=abstract

Astronomy and Astrophysics (ISSN 0004-6361), vol. 220, no. 1-2, Aug. 1989, p. 245-248.

Astronomy and Astrophysics

Astrophysics

13

Cyclic Hydrocarbons, Infrared Spectra, Interstellar Matter, Molecular Spectra, Temperature Effects, Absorption Spectra, Fine Structure, Spectral Bands

Scientific paper

Laboratory experiments have been performed to investigate the temperature dependence of the absorption spectrum of the coronene molecule (C24H12), believed to be representative of the polycyclic aromatic hydrocarbon molecules present in the interstellar medium. The main result is that both line positions and total intensities are almost unchanged when varying the temperature so that the spectrum is mostly temperature-independent in the explored range, supporting the modeling of the IR emission originally made by Leger and Puget (1984) where room temperature was used in the calculations. In the structure of the band shape, small temperature-correlated changes are observed. Qualitative arguments are given to interpret them.

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