| People | Locations | Statistics |
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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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Zijlstra, Albert
in Cooperation with on an Cooperation-Score of 37%
Topics
Publications (15/15 displayed)
- 2023The heart of Sakurai's Object revealed by ALMAcitations
- 2021Dust Formation in a Primitive Environment
- 2021Dust Formation in a Primitive Environment
- 2020The infrared view of dust and molecules around V4334 Sgr (Sakurai’s Object): a 20-year retrospectivecitations
- 2019Stellar Pulsation and the Production of Dust and Molecules in Galactic Carbon Starscitations
- 2016The Infrared Spectral Properties of Magellanic Carbon Starscitations
- 2016The Infrared Spectral Properties of Magellanic Carbon Starscitations
- 2014The Herschel planetary nebula survey (HerPlaNS): I. Data overview and analysis demonstration with NGC? 6781citations
- 2011The identification of probable SiS emission at 13-14 μm in spectra of galactic S starscitations
- 2009Unusual dust emission from planetary nebulae in the magellanic cloudscitations
- 2008The Magellanic zoo: Mid-infrared Spitzer spectroscopy of evolved stars and circumstellar dust in the Magellanic Cloudscitations
- 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
- 2006A Spitzer mid-infrared spectral survey of mass-losing carbon stars in the Large Magellanic Cloudcitations
- 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
Stellar Pulsation and the Production of Dust and Molecules in Galactic Carbon Stars
Abstract
New infrared spectra of 33 Galactic carbon stars from FORCAST on SOFIA reveal strong connections between stellar pulsations and the dust and molecular chemistry in their circumstellar shells. A sharp boundary in overall dust content, which predominantly measures the amount of amorphous carbon, separates the semi-regular and Mira variables, with the semi-regulars showing little dust in their spectra and the Miras showing more. In semi-regulars, the contribution from SiC dust increases rapidly as the overall dust content grows, but in Miras, the SiC dust feature grows weaker as more dust is added. A similar dichotomy is found with the absorption band from CS at ∼7.3 μm, which is generally limited to semi-regular variables. Observationally, these differences make it straightforward to distinguish semiregular and Mira variables spectroscopically without the need for long-term photometric observations or knowledge of their distances. The rapid onset of strong SiC emission in Galactic carbon stars in semi-regulars variables points to a different dust-condensation process before strong pulsations take over. The break in the production of amorphous carbon between semi-regulars and Miras seen in the Galactic sample is also evident in Magellanic carbon stars, linking strong pulsations in carbon stars to the strong mass-loss rates which will end their lives as stars across a wide range of metallicities.