Carbon Stars with Silicate Dust in Their Circumstellar Shells
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.
- Publication:
-
The Astrophysical Journal
- Pub Date:
- August 1986
- DOI:
- 10.1086/184720
- Bibcode:
- 1986ApJ...307L..15L
- Keywords:
-
- Carbon Stars;
- Cosmic Dust;
- Silicates;
- Stellar Envelopes;
- Emission Spectra;
- Grains;
- Infrared Astronomy;
- Spaceborne Astronomy;
- Astrophysics;
- INFRARED: SPECTRA;
- INTERSTELLAR: GRAINS;
- STARS: CARBON;
- STARS: CIRCUMSTELLAR SHELLS