Absil, Olivier, Mennesson, Bertrand, Le Bouquin, Jean-Baptiste, Di Folco, Emmanuel, Kervella, Pierre, Augereau, Jean-Charles
The innermost parts of dusty debris disks around main-sequence stars are currently poorly known due to the high contrast and small angular separation with their parent stars. Using near-infrared...
Absil, Olivier, Mennesson, Bertrand, Bouquin, Jean-Baptiste Le, Di Folco, Emmanuel, Kervella, Pierre, Augereau, Jean-Charles
The innermost parts of dusty debris disks around main sequence stars are currently poorly known due to the high contrast and small angular separation with their parent stars. Using near-infrared...
Le Bouquin, J-B, Absil, Olivier, Benisty, M, Massi, F, Mérand, A, Stefl, S
Aims. We discuss the spin-orbit orientation of the Fomalhaut planetary system composed of a central A4V star, a debris disk, and a recently discovered planetary companion. Methods: We use spectrally...
Bouquin, Jean-Baptiste Le, Absil, Olivier, Benisty, Myriam, Massi, Fabrizio, Merand, Antoine, Stefl, Stan
We discuss the spin-orbit orientation of the Fomalhaut planetary system composed of a central A4V star, a debris disk, and a recently discovered planetary companion. We use spectrally resolved,...
Darwin-A Mission to Detect and Search for Life on Extrasolar Planets (2009)
Cockell, C S, Léger, A, Fridlund, M, Herbst, T M, Kaltenegger, L, Absil, Olivier, ...
The discovery of extrasolar planets is one of the greatest achievements of modern astronomy. The detection of planets that vary widely in mass demonstrates that extrasolar planets of low mass exist....
Darwin---an experimental astronomy mission to search for extrasolar planets (2009)
Cockell, Charles S, Herbst, Tom, Léger, Alain, Absil, Olivier, Beichman, Charles, Benz, Willy, ...
As a response to ESA call for mission concepts for its Cosmic Vision 2015--2025 plan, we propose a mission called Darwin. Its primary goal is the study of terrestrial extrasolar planets and the...
Ollivier, M, Absil, Olivier, Allard, F, Berger, J-P, Bordé, P, Cassaing, F, ...
PEGASE is a mission dedicated to the exploration of the environment (including habitable zone) of young and solar-type stars (particularly those in the DARWIN catalogue) and the observation of low...
Dust in the inner regions of debris disks around A stars (2009)
Akeson, R L, Ciardi, D R, Millan-Gabet, R, Merand, A, Di Folco, E, Monnier, J D, ...
We present infrared interferometric observations of the inner regions of two A-star debris disks, beta Leo and zeta Lep, using the FLUOR instrument at the CHARA interferometer on both short (30 m)...
Milli-arcsecond Astrophysics with VSI, the VLTI Spectro-imager in the ELT Era (2009)
Malbet, F, Buscher, D, Weigelt, G, Garcia, P, Gai, M, Lorenzetti, D, ...
Nowadays, compact sources relatively warm like surfaces of nearby stars, circumstellar environments of stars from early stages to the most evolved ones and surroundings of active galactic nuclei can...
Le Bouquin, Jean-Baptiste, Absil, Olivier, Benisty, Myriam, Massi, Fabrizio, Merand, Antoine, Stefl, Stan
We discuss the spin-orbit orientation of the Fomalhaut planetary system composed of a central A4V star, a debris disk, and a recently discovered planetary companion. We use spectrally resolved,...
Le Bouquin, Jean-Baptiste, Absil, Olivier, Benisty, Myriam, Massi, Fabrizio, Merand, Antoine, Stefl, Stan
We discuss the spin-orbit orientation of the Fomalhaut planetary system composed of a central A4V star, a debris disk, and a recently discovered planetary companion. We use spectrally resolved,...
Technology for a Mid-IR Flagship Mission to Characterize Earth-like Exoplanets (2009)
Lawson, PR, Absil, Olivier, Akeson, RL, Bally, J, Barry, Raphaëlle, Beichman, CA, ...
Not Available
Phase Referencing in Optical Interferometry (2008)
Filho, Mercedes E., Garcia, Paulo, Duvert, Gilles, Duchene, Gaspard, Thiebaut, Eric, Young, John, ...
One of the aims of next generation optical interferometric instrumentation is to be able to make use of information contained in the visibility phase to construct high dynamic range images. Radio and...
Phase Closure Image Reconstruction for Future VLTI Instrumentation (2008)
Filho, Mercedes E., Renard, Stephanie, Garcia, Paulo, Duvert, Gilles, Duchene, Gaspard, Thiebaut, Eric, ...
Classically, optical and near-infrared interferometry have relied on closure phase techniques to produce images. Such techniques allow us to achieve modest dynamic ranges. In order to test the...
Defrere, Denis, Absil, Olivier, Danchi, W C, Den Hartog, R
Context: Characterising the circumstellar dust around nearby main sequence stars is a necessary step in understanding the planetary formation process and is crucial for future life-finding space...
Absil, Olivier, Di Folco, E, Mérand, A, Augereau, J-C, Defrere, Denis, ...
Aims. We aim at directly detecting the presence of optically thin circumstellar dust emission within the terrestrial planetary zone around main sequence stars known to harbour cold debris discs. The...
VSI: the VLTI spectro-imager (2008)
Malbet, F, Buscher, D, Weigelt, G, Garcia, P, Gai, M, Lorenzetti, D, ...
Optical and Infrared Interferometry.
Science case for 1 mas spectro-imagining in the near-infrared (2008)
Garcia, Paulo J V, Berger, Jean-Philippe, Marconi, Alessandro, Krivov, Alexander, Chiavassa, Andrea, Aringer, Bernard, ...
Optical and Infrared Interferometry.
Phase closure image reconstruction for future VLTI instrumentation (2008)
Filho, Mercedes E, Renard, Stephanie, Garcia, Paulo, Duvert, Gilles, Duchene, Gaspard, Thiebaut, Eric, ...
Optical and Infrared Interferometry.
Phase referencing in optical interferometry (2008)
Filho, Mercedes E, Garcia, Paulo, Duvert, Gilles, Duchene, Gaspard, Thiebaut, Eric, Young, John, ...
Optical and Infrared Interferometry.
On the observability of resonant structures in planetesimal disks due to planetary migration (2008)
Reche, R, Beust, H, Augereau, J-C, Absil, Olivier
Context: The observed clumpy structures in debris disks are commonly interpreted as particles trapped in mean-motion resonances with an unseen exo-planet. Populating the resonances requires a...
Président: Pr. Jean-Pierre Swings (2008)
Olivier Absil, Directeur Pr, Jean Surdej, Examinateurs Dr, Vincent Coudé Foresto
planetary systems using infrared interferometric techniques THÈSE présentée pour l’obtention du diplôme de
On the observability of resonant structures in planetesimal disks due to planetary migration (2008)
Reche, Rémy, Beust, Hervé, Augereau, J. C., Absil, Olivier
We present a thorough study of the impact of a migrating planet on a planetesimal disk, by exploring a broad range of masses and eccentricities for the planet. We discuss the sensitivity of the...
On the observability of resonant structures in planetesimal disks due to planetary migration (2008)
Reche, Rémy, Beust, Hervé, Augereau, J. C., Absil, Olivier
We present a thorough study of the impact of a migrating planet on a planetesimal disk, by exploring a broad range of masses and eccentricities for the planet. We discuss the sensitivity of the...
On the observability of resonant structures in planetesimal disks due to planetary migration (2008)
Reche, Rémy, Beust, Hervé, Augereau, J. C., Absil, Olivier
We present a thorough study of the impact of a migrating planet on a planetesimal disk, by exploring a broad range of masses and eccentricities for the planet. We discuss the sensitivity of the...
Science case for 1 mas spectro-imagining in the near-infrared (2008)
Garcia, Paulo J. V., Berger, Jean-Philippe, Marconi, Alessandro, Krivov, Alexander, Chiavassa, Andrea, Aringer, Bernard, ...
We present the work developed within the science team of the Very Large Telescope Interferometer Spectro-Imager (VSI) during the Phase A studies. VSI aims at delivering ~ 1 milliarcsecond resolution...
Absil, Olivier, Barillot, M, Swain, M R
Context: Detecting the presence of circumstellar dust around nearby solar-type main sequence stars is an important pre-requisite for the design of future life-finding space missions such as ESA's...
Di Folco, E, Absil, Olivier, Augereau, J-C, Mérand, A, Thévenin, F, ...
Context: The quest for hot dust in the central region of debris disks requires high resolution and high dynamic range imaging. Near-infrared interferometry is a powerful means to directly detect...
Potential of space-based infrared Bracewell interferometers for planet detection (2007)
Defrere, Denis, Absil, Olivier, Hanot, Charles, Fridlund, M
The Darwin and TPF-I space missions will be able to study the atmosphere of distant worlds similar to the Earth. Flying these space-based interferometers will however be an extraordinary...
L'étude des systèmes planétaires extrasolaires a considérablement fleuri durant les vingt dernières années, stimulée par la découverte de poussières circumstellaires et de planètes...
Riaud, Pierre, Mawet, D, Absil, Olivier, Boccaletti, A, Baudoz, P, Herwats, Emilie, ...
Context: .High angular resolution imaging of nearby pre-main sequence stars with ages between 1 and 30 Myr can give valuable information on planet formation mechanisms. This range of ages is thought...
Riaud, P, Mawet, D, Absil, Olivier, Boccaletti, A, Baudoz, P, Herwats, Emilie, ...
Context: High angular resolution imaging of nearby pre-main sequence stars with ages between 1 and 30 Myr can give valuable information on planet formation mechanisms. This range of ages is thought...
Aufdenberg, J P, Mérand, A, Absil, Olivier, Di Folco, E, Kervella, P, ...
We have obtained high-precision interferometric measurements of Vega with the CHARA Array and FLUOR beam combiner in the K' band at projected baselines between 103 and 273 m. The measured visibility...
The 4m international liquid mirror telescope (ILMT) (2006)
Surdej, Jean, Absil, Olivier, Bartczak, Przemyslaw, Borra, E, Chisogne, J-P, Claeskens, J-F, ...
The entire funding has recently been obtained in Belgium for the construction of a 4m Liquid Mirror Telescope. Its prime focus will be equipped with a semi-conventional glass corrector allowing to...
Circumstellar material in the Vega inner system revealed by CHARA/FLUOR (2006)
Absil, Olivier, Di Folco, E, Mérand, A, Augereau, J-C, Aufdenberg, J P, ...
Context: Only a handful of debris disks have been imaged up to now. Due to the need for high dynamic range and high angular resolution, very little is known about the inner planetary region, where...
Université de Liège
Absil, Olivier, Den Hartog, R, Gondoin, P, Fabry, P, Wilhelm, R, Gitton, P, ...
Nulling interferometry, a powerful technique for high-resolution imaging of the close neighbourhood of bright astrophysical objets, is currently considered for future space missions such as Darwin or...
Chazelas, Bruno, Brachet, Frank, Bordé, Pascal, Mennesson, Bertrand, Ollivier, Marc, Absil, Olivier, ...
We revisit the nulling interferometer performances that are needed for direct detection and the spectroscopic analysis of exoplanets, e.g., with the DARWIN [European Space Agency-SCI 12 (2000)] or...
L'étude des systèmes planétaires extrasolaires a considérablement fleuri durant les vingt dernières années, stimulée par la découverte de poussières circumstellaires et de planètes...
L'étude des systèmes planétaires extrasolaires a considérablement fleuri durant les vingt dernières années, stimulée par la découverte de poussières circumstellaires et de planètes...
ALADDIN: an optimized ground-based precursor for DARWIN (2006)
Coudé Du Foresto, Vincent, Absil, Olivier, Barillot, Marc, Swain, Mark
Conceptual design of the ALADDIN Antarctic nulling interferometer (2006)
Barillot, Marc, Courteau, Pascal, Absil, Olivier, Coudé Du Foresto, Vincent, Swain, Mark
It is commonly accepted that highly challenging planet finding missions such as Darwin and TPF need precursors on the ground, for both technological demonstration and study of the exozodiacal clouds...
L'étude des systèmes planétaires extrasolaires a considérablement fleuri durant les vingt dernières années, stimulée par la découverte de poussières circumstellaires et de planètes...