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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
The destruction and survival of dust in the shell around SN2008S
Abstract
SN2008S erupted in early 2008 in the grand design spiral galaxy NGC 6946. The progenitor was detected by Prieto et al. in Spitzer Space Telescope images taken over the four years prior to the explosion, but was not detected in deep optical images, from which they inferred a self-obscured object with a mass of about 10M<SUB>solar</SUB>. We obtained Spitzer observations of SN 2008S 5 days after its discovery, as well as coordinated Gemini and Spitzer optical and infrared observations 6 months after its outburst. <P />We have constructed radiative transfer dust models for the object before and after the outburst, using the same r<SUP>-2</SUP> density distribution of pre-existing amorphous carbon grains for all epochs and taking light travel time effects into account. We rule out silicate grains as a significant component of the dust around SN 2008S. The inner radius of the dust shell moved outwards from its pre-outburst value of 85 au to a post-outburst value of 1250 au, attributable to grain vaporization by the light flash from SN 2008S. Although this caused the circumstellar extinction to decrease from A<SUB>V</SUB> = 15 before the outburst to 0.8 after the outburst, we estimate that less than 2 per cent of the overall circumstellar dust mass was destroyed. <P />The total mass-loss rate from the progenitor star is estimated to have been 0.5-1.0 × 10<SUP>-4</SUP>M<SUB>solar</SUB>yr<SUP>-1</SUP>. The derived dust-mass-loss rate of 5 × 10<SUP>-7</SUP>M<SUB>solar</SUB>yr<SUP>-1</SUP> implies a total dust injection into the interstellar medium of up to 0.01M<SUB>solar</SUB> over the suggested duration of the self-obscured phase. We consider the potential contribution of objects like SN 2008S to the dust enrichment of galaxies....