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A far-infrared emission feature in carbon-rich stars and planetary nebulaeThe 16-30 micron spectra of several carbon stars and the planetary nebulae IC 418 and NGC 6572 have been obtained using the NASA C-141 Kuiper Airborne Observatory. A newly observed emission feature appears in the spectrum of IRC +10216 and several other carbon stars at wavelengths greater than 24 microns. The feature is interpreted as resulting from a solid-state resonance in the dust grains which have condensed around these stars. A similar feature appears in the spectra of IC 418 and NGC 6572, implying that the same type of dust is present. Since the dust probably condensed from a carbon-rich gas, this indicates an evolutionary link between carbon stars and these planetary nebulae. No identification for the grain material has been found, but some clues are apparent which could aid in the identification.
Document ID
19810061741
Acquisition Source
Legacy CDMS
Document Type
Reprint (Version printed in journal)
External Source(s)
Authors
Forrest, W. J.
(Cornell Univ. Ithaca, NY, United States)
Houck, J. R.
(Cornell Univ. Ithaca, NY, United States)
Mccarthy, J. F.
(Cornell University Ithaca, NY, United States)
Date Acquired
August 11, 2013
Publication Date
August 15, 1981
Publication Information
Publication: Astrophysical Journal
Subject Category
Astrophysics
Accession Number
81A46145
Funding Number(s)
CONTRACT_GRANT: NGR-33-010-081
Distribution Limits
Public
Copyright
Other

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