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A new emission feature in IRAS spectra and the polycyclic aromatic hydrocarbon spectrumIRAS spectra of those sources which show strong 7.7 and 11.3 micron emission features also show a plateau of emission extending from 11.3 to about 13.0 microns. Like the 11.3 micron feature, this new feature is attributed to the CH out-of-plane bending mode in polycyclic aromatic hydrocarbons (PAHs). Its discovery reinforces the identification of the 'unidentified infrared emission features' as emission from PAHs. The wavelength of this new feature suggests that interstellar PAHs are not as partially hydrogenated as hitherto thought. It also constrains their molecular structure.
Document ID
19860049368
Acquisition Source
Legacy CDMS
Document Type
Reprint (Version printed in journal)
External Source(s)
Authors
Cohen, M.
(NASA Ames Research Center Moffett Field, CA, United States)
Tielens, A. G. G. M.
(NASA Ames Research Center Moffett Field; California, University, Berkeley, CA, United States)
Allamandola, L. J.
(NASA Ames Research Center Moffett Field, CA, United States)
Date Acquired
August 12, 2013
Publication Date
December 15, 1985
Publication Information
Publication: Astrophysical Journal, Part 2 - Letters to the Editor
Volume: 299
ISSN: 0004-637X
Subject Category
Astrophysics
Accession Number
86A34106
Distribution Limits
Public
Copyright
Other

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