A far-infrared emission feature in carbon-rich stars and planetary nebulae

Abstract

view Abstract Citations (119) References (24) Co-Reads Similar Papers Volume Content Graphics Metrics Export Citation NASA/ADS A far-infrared emission feature in carbon-rich stars and planetary nebulae. Forrest, W. J. ; Houck, J. R. ; McCarthy, J. F. Abstract The 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. Publication: The Astrophysical Journal Pub Date: August 1981 DOI: 10.1086/159143 Bibcode: 1981ApJ...248..195F Keywords: Carbon Stars; Emission Spectra; Far Infrared Radiation; Infrared Astronomy; Planetary Nebulae; Stellar Spectra; Grains; Microwave Spectra; Stellar Envelopes; Stellar Temperature; Astrophysics full text sources ADS | data products SIMBAD (3)