Observations of the unidentified 3.3 micron emission feature in nebulae

Details Observations of the unidentified 3.3 micron emission feature in nebulae Observations of the unidentified 3.3 micron emission feature in nebulae

Apr 1977

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1977apj...213...66r&link_type=abstract

Astrophysical Journal, Part 1, vol. 213, Apr. 1, 1977, p. 66-70. NASA-NSF-supported research.

Astronomy and Astrophysics

Astronomy

94

Astronomical Spectroscopy, Infrared Spectra, Microwave Emission, Nebulae, Spectrophotometry, Emission Spectra, High Resolution, Infrared Astronomy, Line Spectra, Resonance, Spectral Resolution

Scientific paper

Spectrophotometric observations from 2.1 to 4.1 microns of a variety of objects exhibiting the 3.3-micron emission feature (first detected in NGC 7027) are reported. The characteristics of the feature, the various environments in which it is found, and possible emission mechanisms are discussed in light of all the available observations of the feature to date. A resonance feature in solids is the most probable emission mechanism; however, no satisfactory identification has yet been made on the basis of infrared spectroscopy of terrestrial materials.

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