| 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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Dominik, Carsten
University of Amsterdam
in Cooperation with on an Cooperation-Score of 37%
Topics
Publications (9/9 displayed)
- 2024The polarisation properties of the HD 181327 debris ring. Evidence for sub-micron particles from scattered light observationscitations
- 2023The polarisation properties of the HD 181327 debris ring. Evidence for sub-micron particles from scattered light observations
- 2023Fractal Aggregates of Submicron-sized Grains in the Young Planet-forming Disk around IM Lupcitations
- 2022Locating dust and molecules in the inner circumstellar environment of R Sculptoris with MATISSEcitations
- 2014Rolling friction of adhesive microspherescitations
- 2014Dusty tails of evaporating exoplanets. I. Constraints on the dust compositioncitations
- 2010Dust Evolution in Protoplanetary Disks Around Herbig Ae/Be Stars—the Spitzer Viewcitations
- 2009The inner rim structures of protoplanetary discscitations
- 2006Water ice growth around evolved stars. II. Modeling infrared spectracitations
Places of action
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article
Dusty tails of evaporating exoplanets. I. Constraints on the dust composition
Abstract
Context. Recently, two exoplanet candidates have been discovered, KIC 12557548b and KOI-2700b, whose transit profiles show evidence of a comet-like tail of dust trailing the planet, thought to be fed by the evaporation of the planet's surface. <BR /> Aims: We aim to put constraints on the composition of the dust ejected by these objects from the shape of their transit light curves. <BR /> Methods: We derive a semi-analytical expression for the attenuation of the dust cross-section in the tail, incorporating the sublimation of dust grains as well as their drift away from the planet. This expression shows that the length of the tail is highly sensitive to the sublimation properties of the dust material. We compute tail lengths for several possible dust compositions, and compare these to observational estimates of the tail lengths of KIC 12557548b and KOI-2700b, inferred from their light curves. <BR /> Results: The observed tail lengths are consistent with dust grains composed of corundum (Al<SUB>2</SUB>O<SUB>3</SUB>) or iron-rich silicate minerals (e.g., fayalite, Fe<SUB>2</SUB>SiO<SUB>4</SUB>). Pure iron and carbonaceous compositions are not favoured. In addition, we estimate dust mass loss rates of 1.7 ± 0.5 M<SUB>⊕</SUB> Gyr<SUP>-1</SUP> for KIC 12557548b, and > 0.007 M<SUB>⊕</SUB> Gyr<SUP>-1</SUP> (1σ lower limit) for KOI-2700b....