Carbon stars with silicate dust in their circumstellar shells

Details Carbon stars with silicate dust in their circumstellar shells Carbon stars with silicate dust in their circumstellar shells

Aug 1986

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1986apj...307l..15l&link_type=abstract

Astrophysical Journal, Part 2 - Letters to the Editor (ISSN 0004-637X), vol. 307, Aug. 1, 1986, p. L15-L19.

Astronomy and Astrophysics

Astronomy

189

Carbon Stars, Cosmic Dust, Silicates, Stellar Envelopes, Emission Spectra, Grains, Infrared Astronomy, Spaceborne Astronomy

Scientific paper

Almost all carbon stars having low-resolution spectra obtained with IRAS are surrounded by circumstellar dust shells usually characterized by a very uniform 11.15 μm SiC grain emission feature. About 4% of the C stars show a feature that is shifted to ≡ 11.6 μm. Extraordinarily, three C stars (BM Gem, V778 Cyg, and C1003) are apparently surrounded by oxygen-rich dust shells characterized by strong silicate emission.

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