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The Infrared Emission Features in the Spectrum of the Wolf-Rayet star WR 48aBased on observations made with the Infrared Space Observatory, an ESA project with instruments funded by ESA member states (especially the PI countries: France, Germany, the Netherlands, and the United Kingdom) and with the participation of ISAS and NASA.

Authors
Type
Published Article
Journal
The Astrophysical Journal Letters
Publication Date
Oct 06, 2002
Volume
579
Issue
2
Pages
91–91
Source
SETI Institute
License
Unknown

Abstract

We present the first detection of unidentified infrared (UIR) emission features at~ 6.4 and 7.9 μm in the spectrum of the dusty WC8 Wolf-Rayet star WR 48a. Based on the H- deficient nature of WC stars, we attribute the emission features to large carbonaceous molecules or amorphous carbon dust grains in the circumstellar environment of WR 48a. The 6.4 μm feature resembles the emission feature seen toward H-deficient planetary nebulae (PNe), while the 7.9 μm profile resembles that of some PNe with H-deficient ...

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