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A new emission feature in IRAS spectra and the polycyclic aromatic hydrocarbon spectrum (1985)

Tielens, A. G. G. M. ; Cohen, M. ; Allamandola, L. J.

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Publication Date: 2011-08-19

Description: IRAS 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.

Keywords: ASTROPHYSICS

Type: Astrophysical Journal, Part 2 - Letters to the Editor (ISSN 0004-637X); 299; L93-L97

Format: text

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