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The Chemical Identification of Grain Mantles by Infrared Spectroscopy

Published online by Cambridge University Press:  14 August 2015

L. J. Allamandola ,
J. M. Greenberg ,
C. A. Norman  and
W. Hagen
L. J. Allamandola
Affiliation:
Laboratory Astrophysics, Leiden University, Leiden, Holland.
J. M. Greenberg
Affiliation:
Laboratory Astrophysics, Leiden University, Leiden, Holland.
C. A. Norman
Affiliation:
Laboratory Astrophysics, Leiden University, Leiden, Holland.
W. Hagen
Affiliation:
Laboratory Astrophysics, Leiden University, Leiden, Holland.

Extract

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The composition and physical properties of interstellar grain mantles continues to be an important problem in astrophysics. Part of this importance comes from the fact that grain mantle composition, photochemistry and photophysics are involved in interstellar chemistry (Greenberg et al. 1972, Greenberg, 1979, Greenberg et al. this volume). Because most molecules have a number of fundamental modes of vibration which possess activity between 2.5 and 25 μm (the middle infrared), spectroscopic measurement in this region can provide a direct probe of the molecules making up grain mantles. In addition to molecular composition, under favorable conditions, such measurements can yield molecular abundances, the solid/gas ratio for specific molecules and give an indication of such physical grain properties as temperature and thermal history.

Type
Research Article
Information
Symposium - International Astronomical Union , Volume 87: Interstellar Molecules , 1980 , pp. 373 - 380
Copyright
Copyright © Reidel 1980 

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