New emission feature in IRAS spectra and the polycyclic aromatic hydrocarbon spectrum

Journal Article · Sun Dec 15 04:00:00 EST 1985 · Astrophys. J., Lett. Ed.; (United States)

DOI:https://doi.org/10.1086/184587· OSTI ID:6328766

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

IRAS psectra of those sources which show strong 7.7 and 11.3 m emission features also show a plateau of emission extending from 11.3 to about 13.0 m. Like the 11.3 m feature, we attribute this new feature 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.

• Research Organization: Radio Astronomy Laboratory, University of California, Berkeley
• OSTI ID: 6328766
• Journal Information: Astrophys. J., Lett. Ed.; (United States), Journal Name: Astrophys. J., Lett. Ed.; (United States) Vol. 299:2; ISSN AJLEA
• Country of Publication: United States
• Language: English

Related Subjects

640105* -- Astrophysics & Cosmology-- Galaxies
71 CLASSICAL AND QUANTUM MECHANICS
GENERAL PHYSICS
AROMATICS
CHEMISTRY
COSMIC DUST
COSMOCHEMISTRY
DATA
DUSTS
EMISSION SPECTRA
EXPERIMENTAL DATA
HYDROCARBONS
INFORMATION
INFRARED SPECTRA
INTERSTELLAR SPACE
MOLECULES
NUMERICAL DATA
ORGANIC COMPOUNDS
POLYCYCLIC AROMATIC HYDROCARBONS
SPACE
SPECTRA