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VLTI images of circ...
VLTI images of circumbinary disks around evolved stars
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- Kluska, J. (author)
- Katholieke Universiteit Leuven
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- Claes, Rik (author)
- Katholieke Universiteit Leuven
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- Corporaal, Akke (author)
- Katholieke Universiteit Leuven
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- van Winckel, H. (author)
- Katholieke Universiteit Leuven
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- Alcolea, J. (author)
- Observatorio Astronómico Nacional (OAN),Spanish National Observatory (OAN)
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- Anugu, Narsireddy (author)
- University of Arizona
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- Berger, J. P. (author)
- Institut de Planetologie et d'Astrophysique de Grenoble
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- Bollen, Dylan (author)
- Katholieke Universiteit Leuven
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- Bujarrabal, V. (author)
- Observatorio Astronómico Nacional (OAN),Spanish National Observatory (OAN)
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- Izzard, Robert (author)
- University of Surrey
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- Kamath, Devika (author)
- Macquarie University
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- Kraus, S. (author)
- University of Exeter
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- Le Bouquin, J. B. (author)
- Institut de Planetologie et d'Astrophysique de Grenoble
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- Min, M. (author)
- Netherlands Institute for Space Research (SRON)
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- Monnier, John D. (author)
- University of Michigan
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- Olofsson, Hans, 1952 (author)
- Chalmers tekniska högskola,Chalmers University of Technology
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(creator_code:org_t)
- SPIE, 2020
- 2020
- English.
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In: Proceedings of SPIE - The International Society for Optical Engineering. - : SPIE. - 0277-786X .- 1996-756X. ; 11446
- Related links:
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Abstract
Subject headings
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- The new generation of VLTI instruments (GRAVITY, MATISSE) aims to produce routinely interferometric images to uncover the morphological complexity of different objects at high angular resolution. Image reconstruction is, however, not a fully automated process. Here we focus on a specific science case, namely the complex circumbinary environments of a subset of evolved binaries, for which interferometric imaging provides the spatial resolution required to resolve the immediate circumbinary environment. Indeed, many binaries where the main star is in the post-asymptotic giant branch (post-AGB) phase are surrounded by circumbinary disks. Those disks were first inferred from the infrared excess produced by dust. Snapshot interferometric observations in the infrared confirmed disk-like morphology and revealed high spatial complexity of the emission that the use of geometrical models could not recover without being strongly biased. Arguably, the most convincing proof of the disk-like shape of the circumbinary environment came from the first interferometric image of such a system (IRAS08544-4431) using the PIONIER instrument at the VLTI. This image was obtained using the SPARCO image reconstruction approach that enables to subtract a model of a component of the image and reconstruct an image of its environment only. In the case of IRAS08544-4431, the model involved a binary and the image of the remaining signal revealed several unexpected features. Then, a second image revealed a different but also complex circumstellar morphology around HD101584 that was well studied by ALMA. To exploit the VLTI imaging capability to understand these targets, we started a large programme at the VLTI to image post-AGB binary systems using both PIONIER and GRAVITY instruments.
Subject headings
- NATURVETENSKAP -- Fysik -- Astronomi, astrofysik och kosmologi (hsv//swe)
- NATURAL SCIENCES -- Physical Sciences -- Astronomy, Astrophysics and Cosmology (hsv//eng)
- NATURVETENSKAP -- Data- och informationsvetenskap -- Datorseende och robotik (hsv//swe)
- NATURAL SCIENCES -- Computer and Information Sciences -- Computer Vision and Robotics (hsv//eng)
- TEKNIK OCH TEKNOLOGIER -- Medicinteknik -- Medicinsk bildbehandling (hsv//swe)
- ENGINEERING AND TECHNOLOGY -- Medical Engineering -- Medical Image Processing (hsv//eng)
Keyword
- PIONIER
- Binaries
- VLTI
- Image reconstruction
- Infrared interferometry
Publication and Content Type
- kon (subject category)
- ref (subject category)
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To the university's database
- By the author/editor
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Kluska, J.
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Claes, Rik
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Corporaal, Akke
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van Winckel, H.
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Alcolea, J.
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Anugu, Narsiredd ...
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show more...
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Berger, J. P.
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Bollen, Dylan
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Bujarrabal, V.
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Izzard, Robert
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Kamath, Devika
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Kraus, S.
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Le Bouquin, J. B ...
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Min, M.
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Monnier, John D.
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Olofsson, Hans, ...
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- About the subject
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- NATURAL SCIENCES
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NATURAL SCIENCES
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and Physical Science ...
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and Astronomy Astrop ...
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- NATURAL SCIENCES
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NATURAL SCIENCES
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and Computer and Inf ...
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and Computer Vision ...
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- ENGINEERING AND TECHNOLOGY
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ENGINEERING AND ...
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and Medical Engineer ...
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and Medical Image Pr ...
- Articles in the publication
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Proceedings of S ...
- By the university
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Chalmers University of Technology