Hydrocarbon emission features in the IR spectra of warm supergiants

Journal Article · Sat Dec 01 04:00:00 EST 1990 · Astrophysical Journal; (USA)

DOI:https://doi.org/10.1086/185879· OSTI ID:5995722

Buss, Jr, R H; Cohen, M; Tielens, A G.G.M.; Werner, M W; Bregman, J D ^[1]

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1. NASA, Ames Research Center, Moffett Field, CA (USA)

Observations in the 3-13 micron range are presented for two objects possessing the unidentified 21-micron feature, IRAS 22272 and IRAS 07134, which were obtained in the course of search for circumstellar aromatic hydrocarbon (PAH) emission bands. The 3.3 and 6.2 micron bands are attributed to circumstellar PAH molecules, and the 6-9 micron plateau and the 12- and 6.9-micron lines are attributed to larger, aromatic hydrocarbon clusters. These are the coolest stars known to exhibit the IR emission bands. The 21-micron feature is conjectured to also originate in a carbonaceous carrier. 29 refs.

• OSTI ID: 5995722
• Journal Information: Astrophysical Journal; (USA), Journal Name: Astrophysical Journal; (USA) Vol. 365; ISSN ASJOA; ISSN 0004-637X
• Country of Publication: United States
• Language: English

Related Subjects

640102* -- Astrophysics & Cosmology-- Stars & Quasi-Stellar
Radio & X-Ray Sources
71 CLASSICAL AND QUANTUM MECHANICS
GENERAL PHYSICS
AROMATICS
CHEMICAL COMPOSITION
EMISSION SPECTRA
GIANT STARS
HYDROCARBONS
INFRARED SPECTRA
INTERSTELLAR SPACE
NEBULAE
ORGANIC COMPOUNDS
PLANETARY NEBULAE
POLYCYCLIC AROMATIC HYDROCARBONS
SPACE
SPECTRA
STARS
SUPERGIANT STARS