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Hydrocarbon emission features in the IR spectra of warm supergiants (1990)

Tielens, A. G. G. M. ; Buss, R. H., Jr. ; Bregman, J. D. ; [et al.]

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Publication Date: 2011-08-19

Description: 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.

Keywords: ASTROPHYSICS

Type: Astrophysical Journal, Part 2 - Letters (ISSN 0004-637X); 365; L23-L26

Format: text

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