Airborne observations of the infrared emission bands

Details Airborne observations of the infrared emission bands Airborne observations of the infrared emission bands

Sep 1989

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1989esasp.290..149c&link_type=abstract

In ESA, Infrared Spectroscopy in Astronomy p 149-154 (SEE N90-19084 11-89)

Astronomy and Astrophysics

Astronomy

Emission Spectra, H Ii Regions, Infrared Spectra, Planetary Nebulae, Satellite Observation, Hydrocarbons, Infrared Astronomy Satellite, Interstellar Matter, Light Scattering, Molecular Spectra, Molecules, Reflection Nebulae

Scientific paper

The data concerning low resolution airborne spectra from 5 to 8 microns available for a sample of 40 sources selected from the Infrared Astronomy Satellite low resolution spectral Atlas with polycyclic aromatic hydrocarbon (PAH) emission features, are discussed. A new emission band at 5.2 microns, previously predicted for PAHs, was found in 33 sources; it also correlates with the 7.7 microns band. This extends the spectrum of narrow observed PAH features to 3.3, 5.2, 5.6, 6.2, 6.9, 7.7, 8.7, 11.3, and 12.7 microns. From the data the relative strengths of most of these bands are defined in three separate nebular environments: planetaries, H II regions, and reflection nebulae. The differences in the PAHs spectra in those environments are analyzed.

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