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Naji, M. |
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Motta, Antonella |
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Aletan, Dirar |
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Mohamed, Tarek |
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Ertürk, Emre |
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Taccardi, Nicola |
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Kononenko, Denys |
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Petrov, R. H. | Madrid |
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Alshaaer, Mazen | Brussels |
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Bih, L. |
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Casati, R. |
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Muller, Hermance |
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Kočí, Jan | Prague |
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Šuljagić, Marija |
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Kalteremidou, Kalliopi-Artemi | Brussels |
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Azam, Siraj |
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Ospanova, Alyiya |
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Blanpain, Bart |
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Ali, M. A. |
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Popa, V. |
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Rančić, M. |
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Ollier, Nadège |
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Azevedo, Nuno Monteiro |
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Landes, Michael |
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Rignanese, Gian-Marco |
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Loon, J. Th Van
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Topics
Publications (4/4 displayed)
- 2011The identification of probable SiS emission at 13-14 μm in spectra of galactic S starscitations
- 2007Luminosities and mass-loss rates of carbon stars in the Magellanic Cloudscitations
- 2007Molecules and dust grains in AGB stars in nearby galaxies - The influence of metallicities
- 2005An empirical formula for the mass-loss rates of dust-enshrouded red supergiants and oxygen-rich Asymptotic Giant Branch starscitations
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article
The identification of probable SiS emission at 13-14 μm in spectra of galactic S stars
Abstract
A sample of 90 Galactic S stars observed by the Spitzer Space Telescope includes two sources with unusual low-contrast spectral structure between 7 and 14 μm. The most likely estimate of the spectral continuum leads to the identification of molecular emission features from SiS at 7 and 13-14 μm. The spectra also show what is best described as featureless excess emission, most likely from iron dust but possibly from amorphous carbon, as well as an emission feature from amorphous alumina dust peaking at 11-12 μm. The spectra show long-wavelength excesses from cool dust grains in an extended envelope and additional emission features of unknown origin. © 2011. The American Astronomical Society. All rights reserved.