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ATOMIUM: ALMA traci...
ATOMIUM: ALMA tracing the origins of molecules in dust forming oxygen rich M-type stars: Motivation, sample, calibration, and initial results
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- Gottlieb, C. A. (author)
- Harvard-Smithsonian Center for Astrophysics
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- Decin, L. (author)
- University of Leeds,Katholieke Universiteit Leuven
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- Richards, A. M.S. (author)
- University of Manchester
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- De Ceuster, F. (author)
- University College London (UCL),Katholieke Universiteit Leuven
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- Homan, W. (author)
- Katholieke Universiteit Leuven
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- Wallström, Sofia, 1988 (author)
- Katholieke Universiteit Leuven
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- Danilovich, Taissa, 1987 (author)
- Katholieke Universiteit Leuven
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- Millar, T.J. (author)
- Queen's University Belfast
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- Montargès, M. (author)
- Katholieke Universiteit Leuven,Observatoire de Paris,Paris Observatory
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- Wong, K. T. (author)
- Institut de Radioastronomie Millimétrique (IRAM)
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- McDonald, I. (author)
- University of Manchester,Open University
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- Baudry, A. (author)
- Université de Bordeaux,University of Bordeaux
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- Bolte, J. (author)
- Katholieke Universiteit Leuven
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- Cannon, E. (author)
- Katholieke Universiteit Leuven
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- Beck, Elvire De, 1985 (author)
- Chalmers tekniska högskola,Chalmers University of Technology
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- de Koter, A. (author)
- Katholieke Universiteit Leuven,Anton Pannekoek Institute for Astronomy
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- El Mellah, I. (author)
- Katholieke Universiteit Leuven
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- Etoka, S. (author)
- University of Manchester
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- Gobrecht, D. (author)
- Katholieke Universiteit Leuven
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- Gray, M. (author)
- University of Manchester,National Astronomical Research Institute of Thailand
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- Herpin, F. (author)
- Université de Bordeaux,University of Bordeaux
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- Jeste, M. (author)
- Max Planck Gesellschaft zur Förderung der Wissenschaften e.V. (MPG),Max Planck Society for the Advancement of Science (MPG)
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- Kervella, P. (author)
- Observatoire de Paris,Paris Observatory
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- Khouri, Theo, 1985 (author)
- Chalmers tekniska högskola,Chalmers University of Technology
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- Lagadec, E. (author)
- Observatoire de la Cote d'Azur
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- Maes, S. (author)
- Katholieke Universiteit Leuven
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- Malfait, J. (author)
- Katholieke Universiteit Leuven
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- Menten, K. (author)
- Max Planck Gesellschaft zur Förderung der Wissenschaften e.V. (MPG),Max Planck Society for the Advancement of Science (MPG)
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- Muller, Holger (author)
- Universität zu Köln,University of Cologne
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- Pimpanuwat, B. (author)
- National Astronomical Research Institute of Thailand,University of Manchester
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- Plane, J. M. C. (author)
- University of Leeds
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Sahai, R. (author)
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- Van De Sande, M. (author)
- University of Leeds,Katholieke Universiteit Leuven
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- Waters, Lbfm (author)
- Netherlands Institute for Space Research (SRON),Radboud Universiteit,Radboud University
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- Yates, J. A. (author)
- University College London (UCL)
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- Zijlstra, A. (author)
- University of Manchester,The University of Hong Kong
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(creator_code:org_t)
- 2022-04-14
- 2022
- English.
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In: Astronomy and Astrophysics. - : EDP Sciences. - 0004-6361 .- 1432-0746. ; 660
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http://arxiv.org/pdf...
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https://doi.org/10.1...
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Abstract
Subject headings
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- This overview paper presents atomium, a Large Programme in Cycle 6 with the Atacama Large Millimeter/submillimeter Array (ALMA). The goal of atomium is to understand the dynamics and the gas phase and dust formation chemistry in the winds of evolved asymptotic giant branch (AGB) and red supergiant (RSG) stars. A more general aim is to identify chemical processes applicable to other astrophysical environments. Seventeen oxygen-rich AGB and RSG stars spanning a range in (circum)stellar parameters and evolutionary phases were observed in a homogeneous observing strategy allowing for an unambiguous comparison. Data were obtained between 213.83 and 269.71 GHz at high (0.025-0.050), medium (0.13-0.24), and low (~1) angular resolution. The sensitivity per ~1.3 km s-1 channel was 1.5-5 mJy beam-1, and the line-free channels were used to image the millimetre wave continuum. Our primary molecules for studying the gas dynamics and dust formation are CO, SiO, AlO, AlOH, TiO, TiO2, and HCN; secondary molecules include SO, SO2, SiS, CS, H2O, and NaCl. The scientific motivation, survey design, sample properties, data reduction, and an overview of the data products are described. In addition, we highlight one scientific result - the wind kinematics of the atomium sources. Our analysis suggests that the atomium sources often have a slow wind acceleration, and a fraction of the gas reaches a velocity which can be up to a factor of two times larger than previously reported terminal velocities assuming isotropic expansion. Moreover, the wind kinematic profiles establish that the radial velocity described by the momentum equation for a spherical wind structure cannot capture the complexity of the velocity field. In fifteen sources, some molecular transitions other than 12CO v = 0 J = 2 - 1 reach a higher outflow velocity, with a spatial emission zone that is often greater than 30 stellar radii, but much less than the extent of CO. We propose that a binary interaction with a (sub)stellar companion may (partly) explain the non-monotonic behaviour of the projected velocity field. The atomium data hence provide a crucial benchmark for the wind dynamics of evolved stars in single and binary star models.
Subject headings
- NATURVETENSKAP -- Fysik -- Astronomi, astrofysik och kosmologi (hsv//swe)
- NATURAL SCIENCES -- Physical Sciences -- Astronomy, Astrophysics and Cosmology (hsv//eng)
- NATURVETENSKAP -- Fysik -- Atom- och molekylfysik och optik (hsv//swe)
- NATURAL SCIENCES -- Physical Sciences -- Atom and Molecular Physics and Optics (hsv//eng)
- NATURVETENSKAP -- Geovetenskap och miljövetenskap -- Geofysik (hsv//swe)
- NATURAL SCIENCES -- Earth and Related Environmental Sciences -- Geophysics (hsv//eng)
Keyword
- Astrochemistry
- Stars: AGB and post-AGB
- Instrumentation: interferometers
- Stars: mass-loss
- Binaries: general
- Circumstellar matter
Publication and Content Type
- art (subject category)
- ref (subject category)
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To the university's database
- By the author/editor
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Gottlieb, C. A.
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Decin, L.
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Richards, A. M.S ...
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De Ceuster, F.
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Homan, W.
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Wallström, Sofia ...
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show more...
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Danilovich, Tais ...
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Millar, T.J.
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Montargès, M.
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Wong, K. T.
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McDonald, I.
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Baudry, A.
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Bolte, J.
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Cannon, E.
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Beck, Elvire De, ...
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de Koter, A.
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El Mellah, I.
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Etoka, S.
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Gobrecht, D.
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Gray, M.
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Herpin, F.
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Jeste, M.
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Kervella, P.
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Khouri, Theo, 19 ...
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Lagadec, E.
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Maes, S.
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Malfait, J.
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Menten, K.
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Muller, Holger
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Pimpanuwat, B.
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Plane, J. M. C.
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Sahai, R.
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Van De Sande, M.
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Waters, Lbfm
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Yates, J. A.
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Zijlstra, A.
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show less...
- 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 Physical Science ...
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and Atom and Molecul ...
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- NATURAL SCIENCES
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NATURAL SCIENCES
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and Earth and Relate ...
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and Geophysics
- Articles in the publication
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Astronomy and As ...
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Chalmers University of Technology