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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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Meixner, Margaret
in Cooperation with on an Cooperation-Score of 37%
Topics
Publications (12/12 displayed)
- 2013The Detection of C60 in the Well-characterized Planetary Nebula M1-11citations
- 2011The effects of dust on the optical and infrared evolution of SN 2004etcitations
- 2011The mass-loss return from evolved stars to the Large Magellanic Cloud. V. The GRAMS carbon-star model gridcitations
- 2010The destruction and survival of dust in the shell around SN2008Scitations
- 2009Dust Production and Mass Loss in the Galactic Globular Cluster NGC 362citations
- 2006Spitzer SAGE Survey of the Large Magellanic Cloud: Project Overview
- 2006Modelling Evolved Stars Detected by the Spitzer LMC Survey (SAGE)
- 2005The Dust Condensation Sequence at Low Metallicity: AGB Stars in NGC 6822
- 2005The Dust Condensation Sequence at Low Metallicity: AGB Stars in NGC 6822
- 2005The Dust Condensation Sequence at Low Metallicity: AGB Stars in NGC 6822
- 2005Radiative Transfer Modeling of the Extended Dust Shell of AFGL 618
- 2004The O-rich condensation sequence at low metallicity: Large Magellanic Cloud AGB and post-AGB stars
Places of action
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article
Modelling Evolved Stars Detected by the Spitzer LMC Survey (SAGE)
Abstract
The Spitzer photometric survey of the Large Magellanic Cloud (SAGE) has the sensitivity to detect all evolved stars of luminosity 1000 L ☉ or higher. In order to estimate the global mass return to the interstellar medium for these stars we will need to (a) classify the type of object based upon the available photometry from Spitzer, and 2MASS where available; and (b) estimate the dust shell properties directly from these observations. This will require calculating a grid of dust radiative transfer models to cover the range of parameters suitable for stars in the LMC and having an automatic algorithm for selecting the best fit model for each observed object. Given the lower metallicity of the LMC compared to the Galaxy we need to study some of the brighter objects in detail including fitting of spectroscopy observations to understand the basic dust properties for both oxygen-rich objects with silicate dust and carbon-rich objects with amorphous carbon and silicon-carbide dust. The dust to gas mass ratio must also be estimated, as it is expected to be somewhat higher than the values derived for galactic objects. We will show some preliminary results of the modelling work for a small number of the brighter AGB stars or M-type supergiants in the LMC, as well as discussing the identification of groups of objects in the multi-color space defined by the Spitzer IRAC, Spitzer MIPS, and 2MASS observations. The SAGE Project is supported by NASA/Spitzer grant 1275598 and NASA NAG5-12595.