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Carbon stars with silicate dust in their circumstellar shells

I. R. Little-Marenin

Open publisher page 147 citations

Abstract

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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What this paper is about

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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Available abstract

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.

Key concepts: Physics, Carbon star, Stars, Circumstellar dust, Astrophysics, Silicate, Cosmic dust, Astronomy

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