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Chemical tracers of a highly eccentric AGB–main-sequence star binary

Danilovich, Taissa, 1987 (author)
Monash University,Katholieke Universiteit Leuven
Malfait, J. (author)
Katholieke Universiteit Leuven,Max Planck Gesellschaft zur Förderung der Wissenschaften e.V. (MPG),Max Planck Society for the Advancement of Science (MPG),University of Leeds
Van de Sande, M. (author)
University of Leeds,Observatoire de Paris,Paris Observatory,Katholieke Universiteit Leuven
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Montargès, M. (author)
University of Manchester,Max Planck Gesellschaft zur Förderung der Wissenschaften e.V. (MPG),Max Planck Society for the Advancement of Science (MPG)
Kervella, P. (author)
Observatoire de Paris,Paris Observatory
De Ceuster, F. (author)
Katholieke Universiteit Leuven
Coenegrachts, A. (author)
Katholieke Universiteit Leuven,Harvard-Smithsonian Center for Astrophysics
Millar, T. J. (author)
Queen's University Belfast
Richards, A. M.S. (author)
California Institute of Technology (Caltech)
Decin, L. (author)
Katholieke Universiteit Leuven,University of Leeds
Gottlieb, C. A. (author)
Pinte, C. (author)
Monash University
Beck, Elvire De, 1985 (author)
Chalmers tekniska högskola,Chalmers University of Technology
Price, D. J. (author)
Monash University
Wong, K. T. (author)
Institut de Radioastronomie Millimétrique (IRAM),Uppsala universitet,Uppsala University
Bolte, J. (author)
Christian-Albrechts-Universität zu Kiel,University of Kiel,Katholieke Universiteit Leuven
Menten, K. M. (author)
Baudry, A. (author)
Laboratoire d'Astrophysique de Bordeaux
de Koter, A. (author)
Katholieke Universiteit Leuven,Anton Pannekoek Institute for Astronomy
Etoka, S. (author)
University of Manchester
Gobrecht, David (author)
Gothenburg University,Göteborgs universitet,Institutionen för kemi och molekylärbiologi,Department of Chemistry and Molecular Biology,University of Gothenburg
Gray, M. (author)
Herpin, F. (author)
Laboratoire d'Astrophysique de Bordeaux
Jeste, M. (author)
Lagadec, E. (author)
Maes, S. (author)
McDonald, I. (author)
University of Manchester,Open University
Marinho, L. (author)
Laboratoire d'Astrophysique de Bordeaux
Müller, H. S.P. (author)
Universität zu Köln,University of Cologne
Pimpanuwat, B. (author)
University of Manchester
Plane, J. M.C. (author)
Sahai, R. (author)
Wallström, Sofia, 1988 (author)
Katholieke Universiteit Leuven
Yates, J. (author)
University College London (UCL)
Zijlstra, A. (author)
University of Manchester
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 (creator_code:org_t)
2024
2024
English.
In: Nature Astronomy. - 2397-3366.
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  • Journal article (peer-reviewed)
Abstract Subject headings
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  • Binary interactions have been proposed to explain a variety of circumstellar structures seen around evolved stars, including asymptotic giant branch (AGB) stars and planetary nebulae. Studies resolving the circumstellar envelopes of AGB stars have revealed spirals, disks and bipolar outflows, with shaping attributed to interactions with a companion. Here we use a combined chemical and dynamical analysis to reveal a highly eccentric and long-period orbit for W Aquilae, a binary system containing an AGB star and a main-sequence companion. Our results are based on anisotropic SiN emission, the detections of irregular NS and SiC emission towards the S-type star, and density structures observed in the CO emission. These features are all interpreted as having formed during periastron interactions. Our astrochemistry-based method can yield stringent constraints on the orbital parameters of long-period binaries containing AGB stars, and will be applicable to other systems.

Subject headings

NATURVETENSKAP  -- Fysik -- Astronomi, astrofysik och kosmologi (hsv//swe)
NATURAL SCIENCES  -- Physical Sciences -- Astronomy, Astrophysics and Cosmology (hsv//eng)

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