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Grain SpectroscopyOur fundamental knowledge of interstellar grain composition has grown substantially during the past two decades thanks to significant advances in two areas: astronomical infrared spectroscopy and laboratory astrophysics. The opening of the mid-infrared, the spectral range from 4000-400 cm(sup -1) (2.5-25 microns), to spectroscopic study has been critical to this progress because spectroscopy in this region reveals more about a materials molecular composition and structure than any other physical property. Infrared spectra which are diagnostic of interstellar grain composition fall into two categories: absorption spectra of the dense and diffuse interstellar media, and emission spectra from UV-Vis rich dusty regions. The former will be presented in some detail, with the latter only very briefly mentioned. This paper summarized what we have learned from these spectra and presents 'doorway' references into the literature. Detailed reviews of many aspects of interstellar dust are given.
Document ID
19970022557
Acquisition Source
Ames Research Center
Document Type
Reprint (Version printed in journal)
Authors
Allamandola, L. J.
(NASA Ames Research Center Moffett Field, CA United States)
Date Acquired
August 17, 2013
Publication Date
January 1, 1992
Publication Information
Publication: Astrochemistry of Cosmic Phenomena
Publisher: IAU
Subject Category
Inorganic And Physical Chemistry
Report/Patent Number
NAS 1.15:112462
NASA-TM-112462
Accession Number
97N72128
Distribution Limits
Public
Copyright
Public Use Permitted.
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