Three micron spectroscopy of IRAS sources - Observed and laboratory signatures of PAHs

Details Three micron spectroscopy of IRAS sources - Observed and laboratory signatures of PAHs Three micron spectroscopy of IRAS sources - Observed and laboratory signatures of PAHs

Aug 1990

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1990a%26a...235..367j&link_type=abstract

Astronomy and Astrophysics (ISSN 0004-6361), vol. 235, no. 1-2, Aug. 1990, p. 367-378.

Astronomy and Astrophysics

Astronomy

53

Cyclic Hydrocarbons, Emission Spectra, Infrared Astronomy Satellite, Infrared Radiation, Vibration Mode, Cosmic Dust, H Ii Regions, Interstellar Matter, Molecular Spectra, Radicals, Reflection Nebulae, Spectral Bands

Scientific paper

Three micron spectra at medium resolution of a few IRAS sources having PAH features have been obtained. These spectra reveal the presence, beyond the strong 3.3 micron feature, of several additional weaker emission features at 3.4, 3.46, 3.51 and 3.56 microns. These weaker bands are superimposed on a broad emission plateau extending at least from 3.35 to 3.6 microns. For the emission bands in the 3.4-3.6 micron region, two possible interpretations are extensively discussed. New laboratory spectra are presented to discuss both hypotheses and observational tests are proposed.

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