Infra-red emission lines from molecules in grain mantles

Details Infra-red emission lines from molecules in grain mantles Infra-red emission lines from molecules in grain mantles

Feb 1978

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1978a%26a....63l..23a&link_type=abstract

Astronomy and Astrophysics, vol. 63, no. 3, Feb. 1978, p. L23-L26.

Astronomy and Astrophysics

Astronomy

30

Astronomical Spectroscopy, Emission Spectra, Infrared Astronomy, Molecular Spectra, Planetary Nebulae, Acetylene, Ammonia, Grains, Interstellar Matter, Luminescence, Methane, Water

Scientific paper

The hitherto unidentified IR emission features in NGC 7027 and other objects are shown to be due to fluorescence from vibrationally excited molecules in grain mantles. Using laboratory data to match the observed spectra, positive identification is made of CH4, H2O, NH3, C2H2, H2CO, CO, and NO. This provides the most direct evidence for the composition and existence of complex molecular mantles on grains, the first evidence for such luminescence, and positive identification of methane in the interstellar medium.

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