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Observations of HII Regions and Planetary Nebulae: the Infrared Emission Bands

Published online by Cambridge University Press:  23 September 2016

Jesse D. Bregman
Jesse D. Bregman*
Affiliation:
NASA Ames Research Center

Abstract

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Advances in infrared spectrometers and the theory that PAHs are responsible for the infrared emission bands have led to a wealth of new information in recent years. High quality data have shown many weak emission bands which are diagnostic of the material producing the bands. While correlations of the strengths of the narrow bands indicate that a single material can account for all of the narrow bands, independent spatial behavior of the narrow and broad components show that they have different origins. Predictions of the behavior of the spectra based on laboratory data have been confirmed observationally, strengthening the theory that PAH molecules are the origin of the infrared emission bands.

Type
Section II: The Overidentified Infrared Emission Features
Information
Symposium - International Astronomical Union , Volume 135: Interstellar Dust , 1989 , pp. 109 - 118
Copyright
Copyright © Kluwer 1989 

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