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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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Matsuura, Mikako
Cardiff University
in Cooperation with on an Cooperation-Score of 37%
Topics
Publications (9/9 displayed)
- 2023Quantifying the dust in SN 2012aw and iPTF14hls with ORBYTScitations
- 2023Evidence for late-time dust formation in the ejecta of supernova SN 1995N from emission-line asymmetriescitations
- 2021JWST Survey of the Prototypical Core-collapse Supernova Remnant Cassiopeia A
- 2015A stubbornly large mass of cold dust in the ejecta of Supernova 1987Acitations
- 2015From flux to dust mass: Does the grain-temperature distribution matter for estimates of cold dust masses in supernova remnants?citations
- 2010The mass-loss return from evolved stars to the Large Magellanic Cloud. III. Dust properties for carbon-rich asymptotic giant branch starscitations
- 2006Mid-Infrared Spectroscopy of Carbon Stars in the Small Magellanic Cloudcitations
- 2006A Spitzer mid-infrared spectral survey of mass-losing carbon stars in the Large Magellanic Cloudcitations
- 2006A Spitzer mid-infrared spectral survey of mass-losing carbon stars in the Large Magellanic Cloudcitations
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article
Mid-Infrared Spectroscopy of Carbon Stars in the Small Magellanic Cloud
Abstract
We have observed a sample of 36 objects in the Small Magellanic Cloud (SMC) with the Infrared Spectrometer on the Spitzer Space Telescope. Nineteen of these sources are carbon stars. An examination of the near- and mid-infrared photometry shows that the carbon-rich and oxygen-rich dust sources follow two easily separated sequences. A comparison of the spectra of the 19 carbon stars in the SMC to spectra from the Infrared Space Observatory (ISO) of carbon stars in the Galaxy reveals significant differences. The absorption bands at 7.5 and 13.7 μm due to C<SUB>2</SUB>H<SUB>2</SUB> are stronger in the SMC sample, and the SiC dust emission feature at 11.3 μm is weaker. Our measurements of the MgS dust emission feature at 26-30 μm are less conclusive, but this feature appears to be weaker in the SMC sample as well. All of these results are consistent with the lower metallicity in the SMC. The lower abundance of SiC grains in the SMC may result in less efficient carbon-rich dust production, which could explain the excess C<SUB>2</SUB>H<SUB>2</SUB> gas seen in the spectra. The sources in the SMC with the strongest SiC dust emission tend to have redder infrared colors than the other sources in the sample, which implies more amorphous carbon, and they also tend to show stronger MgS dust emission. The weakest SiC emission features tend to be shifted to the blue; these spectra may arise from low-density shells with large SiC grains....