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VLTI/PIONIER reveal...
VLTI/PIONIER reveals the close environment of the evolved system HD 101584
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- Kluska, J. (författare)
- Katholieke Universiteit Leuven,Katholieke Univ Leuven, Inst voor Sterrenkunde IvS, Celestijnenlaan 200D, B-3001 Leuven, Belgium.
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- Olofsson, Hans, 1952 (författare)
- Chalmers tekniska högskola,Chalmers University of Technology,Chalmers Univ Technol, Dept Space Earth & Environm, Onsala Space Observ, S-43992 Onsala, Sweden.
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- Van Winckel, H. (författare)
- Katholieke Universiteit Leuven,Katholieke Univ Leuven, Inst voor Sterrenkunde IvS, Celestijnenlaan 200D, B-3001 Leuven, Belgium.
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- Khouri, Theo, 1985 (författare)
- Chalmers tekniska högskola,Chalmers University of Technology,Chalmers Univ Technol, Dept Space Earth & Environm, Onsala Space Observ, S-43992 Onsala, Sweden.
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- Wittkowski, M. (författare)
- European Southern Observatory (ESO),ESO, Karl Schwarzschild Str 2, D-85748 Garching, Germany.
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- de Wit, W. J. (författare)
- European Southern Observatory (ESO),ESO, Alonso Cordova 3107, Santiago, Chile.
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- Humphreys, E. M. L. (författare)
- European Southern Observatory (ESO),ESO, Karl Schwarzschild Str 2, D-85748 Garching, Germany.,Chalmers Univ Technol, Dept Space Earth & Environm, Onsala Space Observ, S-43992 Onsala, Sweden.
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- Lindqvist, Michael, 1960 (författare)
- Chalmers tekniska högskola,Chalmers University of Technology
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- Maercker, Matthias, 1979 (författare)
- Chalmers tekniska högskola,Chalmers University of Technology
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- Ramstedt, Sofia (författare)
- Uppsala universitet,Institutionen för fysik och astronomi
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- Tafoya, Daniel, 1981 (författare)
- Uppsala universitet,Uppsala University,Chalmers tekniska högskola,Chalmers University of Technology,Chalmers Univ Technol, Dept Space Earth & Environm, Onsala Space Observ, S-43992 Onsala, Sweden.;Natl Astron Observ Japan, 2-21-1 Osawa, Mitaka, Tokyo 1818588, Japan.
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- Vlemmings, Wouter, 1974 (författare)
- Chalmers tekniska högskola,Chalmers University of Technology,Chalmers Univ Technol, Dept Space Earth & Environm, Onsala Space Observ, S-43992 Onsala, Sweden.
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Katholieke Universiteit Leuven Katholieke Univ Leuven, Inst voor Sterrenkunde IvS, Celestijnenlaan 200D, B-3001 Leuven, Belgium (creator_code:org_t)
- 2020-10-13
- 2020
- Engelska.
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Ingår i: Astronomy and Astrophysics. - : EDP Sciences. - 0004-6361 .- 1432-0746. ; 642
- Relaterad länk:
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https://research.cha...
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https://doi.org/10.1...
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https://urn.kb.se/re...
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Abstract
Ämnesord
Stäng
- Context.The observed orbital characteristics of post-asymptotic giant branch and post-red giant branch (post-RGB) binaries are not understood. We suspect that the missing ingredients needed to explain them probably lie in the continuous interaction of the central binary with its circumstellar environment. Aims.We aim at studying the circumbinary material in these complex systems by investigating the connection between the innermost structures and large-scale structures. Methods.We perform high-angular resolution observations of HD 101584 in the near-infrared continuum. HD 101584 has a complex structure as seen at millimeter wavelengths, with a disk-like morphology and a bipolar outflow due to an episode of a strong binary interaction. To account for the complexity of the target, we first perform an image reconstruction and use this result to fit a geometrical model to extract the morphological and thermal features of the environment. Results.The image reveals an unexpected double ring structure. We interpret the inner ring as having been produced by emission from dust located in the plane of the disk, and the outer ring having been produced by emission from dust that is located 1.6 [D/1kpc] au above the disk plane. The inner ring diameter (3.94 [D/1kpc] au) and temperature (T= 1540 +/- 10 K) are compatible with the dust sublimation front of the disk. The origin of the out-of-plane ring (with a diameter of 7.39 [D/1kpc] au and a temperature of 1014 +/- 10 K) could be episodic ejection or a dust condensation front in the outflow. Conclusions.The observed outer ring is possibly linked with the blue-shifted side of the large-scale outflow seen by the Atacama Large Millimeter/submillimeter Array and may trace its launching location to the central star. Such observations place morphological constraints on the ejection mechanism. Additional observations are needed to constrain the origin of the out-of-plane structure.
Ämnesord
- NATURVETENSKAP -- Fysik -- Astronomi, astrofysik och kosmologi (hsv//swe)
- NATURAL SCIENCES -- Physical Sciences -- Astronomy, Astrophysics and Cosmology (hsv//eng)
Nyckelord
- binaries: general
- circumstellar matter
- techniques: high angular resolution
- outflows
- techniques: interferometric
- stars: AGB and post-AGB
- stars: winds
Publikations- och innehållstyp
- art (ämneskategori)
- ref (ämneskategori)
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Kluska, J.
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Olofsson, Hans, ...
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Van Winckel, H.
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Khouri, Theo, 19 ...
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Wittkowski, M.
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de Wit, W. J.
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Humphreys, E. M. ...
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Lindqvist, Micha ...
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Maercker, Matthi ...
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Ramstedt, Sofia
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Tafoya, Daniel, ...
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Vlemmings, Woute ...
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