Infra-red molecular line emission from grain surfaces in dense clouds

Details Infra-red molecular line emission from grain surfaces in dense clouds Infra-red molecular line emission from grain surfaces in dense clouds

May 1978

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1978a%26a....66..129a&link_type=abstract

Astronomy and Astrophysics, vol. 66, no. 1-2, May 1978, p. 129-135.

Astronomy and Astrophysics

Astronomy

14

Astronomical Spectroscopy, Infrared Astronomy, Interstellar Matter, Nebulae, Free Radicals, Grains, Molecular Collisions, Molecular Oscillations, Molecular Spectra, Radiative Lifetime, Ultraviolet Absorption

Scientific paper

The possibility is examined of observing the radiative decay of the lowest vibrational state of a number of interstellar molecules embedded in grains that have been vibrationally excited by either photon absorption in the visible to ultraviolet range and subsequent relaxation, radical reactions, or molecule-grain collisions. Data from recent laboratory experiments indicate that in low-temperature solids the transfer of energy from vibrational modes into lattice phonons can be inefficient. The predominant mode of decay may then be radiative. A number of molecules which may be observable in future infrared experiments is listed.

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