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The Interstellar C-H Stretching Band Near 3.4 μm: Constraints on the Composition of Organic Material in the Diffuse ISM

Published online by Cambridge University Press:  07 August 2017

S. A. Sandford ,
L. J. Allamandola ,
A. G. G. M. Tielens ,
K. Sellgren ,
M. Tapia  and
Y. Pendleton
S. A. Sandford
Affiliation:
NASA/Ames Research Center, MS 245-6, Moffett Field, CA 94035
L. J. Allamandola
Affiliation:
NASA/Ames Research Center, MS 245-6, Moffett Field, CA 94035
A. G. G. M. Tielens
Affiliation:
NASA/Ames Research Center, MS 245-6, Moffett Field, CA 94035
K. Sellgren
Affiliation:
Dept. of Astronomy, Ohio State Univ., Columbus, OH 43210
M. Tapia
Affiliation:
Instituto de Astronomia, UNAM, Ensenada, Mexico
Y. Pendleton
Affiliation:
NASA/Ames Research Center, MS 245-6, Moffett Field, CA 94035

Abstract

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The spectra of objects suffering extinction by diffuse interstellar dust contain a broad feature centered at ~3300 cm−1 (~3.0 μm), attributed to O-H stretching vibrations, and/or a feature near 2950 cm−1 (3.4 μm) attributed to C-H stretching vibrations. The 2950 cm−1 feature can be attributed to C-H stretching vibrations in the -CH2- and -CH3 groups of a fairly complex carbonaceous material containing aliphatic functional groups.

Type
Diffuse, Translucent and High-Latitude Clouds
Information
Symposium - International Astronomical Union , Volume 150: Astrochemistry of Cosmic Phenomena , 1992 , pp. 133 - 134
Copyright
Copyright © Kluwer 1992 

References

REFERENCES

Sandford, S.A., Allamandola, L.J., Tielens, A.G.G.M., Sellgren, K., Tapia, M., and Pendleton, Y. (1991) ‘The interstellar C-H stretching band near 3.4 microns: Constraints on the composition of organic material in the diffuse interstellar medium’, Astrophys. J. 371, 607–620.Google Scholar