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ALMA reveals sunburn :
ALMA reveals sunburn : CO dissociation around AGB stars in the globular cluster 47 Tucanae
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- McDonald, I. (author)
- Univ Manchester, Sch Phys & Astron, Jodrell Bank Ctr Astrophys, Manchester M13 9PL, Lancs, England.,University of Manchester
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- Zijlstra, A. A. (author)
- Univ Manchester, Sch Phys & Astron, Jodrell Bank Ctr Astrophys, Manchester M13 9PL, Lancs, England.,University of Manchester
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- Lagadec, E. (author)
- Cornell Univ, Cornell Ctr Astrophys & Planetary Sci, Ithaca, NY 14853 USA.;Observ Cote dAzur, F-06304 Nice 4, France.,Cornell University,Observatoire de la Cote d'Azur
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- Sloan, G. C. (author)
- Cornell Univ, Cornell Ctr Astrophys & Planetary Sci, Ithaca, NY 14853 USA.,Cornell University
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- Boyer, M. L. (author)
- NASA, Goddard Flight Ctr, Observat Cosmol Lab, Greenbelt, MD 20771 USA.,NASA Goddard Space Flight Center,University College London (UCL),Cardiff University
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- Matsuura, M. (author)
- UCL, Dept Phys & Astron, London WC1E 6BT, England.;Cardiff Univ, Sch Phys & Astron, Cardiff CF24 3AA, S Glam, Wales.,Royal Observatory of Belgium
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- Smith, R. J. (author)
- Univ Manchester, Sch Phys & Astron, Jodrell Bank Ctr Astrophys, Manchester M13 9PL, Lancs, England.,University of Manchester,Uppsala universitet,Uppsala University
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- Smith, C. L. (author)
- Univ Manchester, Sch Phys & Astron, Jodrell Bank Ctr Astrophys, Manchester M13 9PL, Lancs, England.,University of Manchester
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- Yates, J. A. (author)
- UCL, Dept Phys & Astron, London WC1E 6BT, England.,University College London (UCL)
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- van Loon, J. Th. (author)
- Keele Univ, Astrophys Grp, Lennard Jones Labs, Keele ST5 5BG, Staffs, England.,Keele University
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- Jones, O. C. (author)
- Univ Manchester, Sch Phys & Astron, Jodrell Bank Ctr Astrophys, Manchester M13 9PL, Lancs, England.;STScI, Baltimore, MD 21218 USA.,Space Telescope Science Institute (STScI),University of Manchester
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- Ramstedt, Sofia (author)
- Uppsala universitet,Institutionen för fysik och astronomi,Keele University
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- Avison, A. (author)
- Univ Manchester, Sch Phys & Astron, Jodrell Bank Ctr Astrophys, Manchester M13 9PL, Lancs, England.
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- Justtanont, Kay, 1965 (author)
- Chalmers, Onsala Space Observ, Dept Earth & Space Sci, SE-43992 Onsala, Sweden.,Chalmers tekniska högskola,Chalmers University of Technology
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- Olofsson, Hans, 1952 (author)
- Chalmers, Onsala Space Observ, Dept Earth & Space Sci, SE-43992 Onsala, Sweden.,Chalmers tekniska högskola,Chalmers University of Technology
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- Blommaert, J. A. D. L. (author)
- Vrije Univ Brussel, Dept Phys & Astrophys, Astron & Astrophys Res Grp, B-1050 Brussels, Belgium.,Vrije Universiteit Brüssel (VUB),Vrije Universiteit Brussel (VUB)
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- Goldman, S. R. (author)
- Keele Univ, Astrophys Grp, Lennard Jones Labs, Keele ST5 5BG, Staffs, England.
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- Groenewegen, M. A. T. (author)
- Koninklijke Sterrenwacht Belgie, B-1180 Brussels, Belgium.
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Univ Manchester, Sch Phys & Astron, Jodrell Bank Ctr Astrophys, Manchester M13 9PL, Lancs, England University of Manchester (creator_code:org_t)
- 2015-09-17
- 2015
- English.
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In: Monthly notices of the Royal Astronomical Society. - : Oxford University Press (OUP). - 0035-8711 .- 1365-2966. ; 453:4, s. 4324-4336
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Abstract
Subject headings
Close
- Atacama Large Millimetre Array observations show a non-detection of carbon monoxide around the four most luminous asymptotic giant branch (AGB) stars in the globular cluster 47 Tucanae. Stellar evolution models and star counts show that the mass-loss rates from these stars should be similar to 1.2-3.5x10(-7) M-circle dot yr(-1). We would naively expect such stars to be detectable at this distance (4.5 kpc). By modelling the ultraviolet radiation field from post-AGB stars and white dwarfs in 47 Tuc, we conclude that CO should be dissociated abnormally close to the stars. We estimate that the CO envelopes will be truncated at a few hundred stellar radii from their host stars and that the line intensities are about two orders of magnitude below our current detection limits. The truncation of CO envelopes should be important for AGB stars in dense clusters. Observing the CO (3-2) and higher transitions and targeting stars far from the centres of clusters should result in the detections needed to measure the outflow velocities from these stars.
Subject headings
- NATURVETENSKAP -- Fysik -- Astronomi, astrofysik och kosmologi (hsv//swe)
- NATURAL SCIENCES -- Physical Sciences -- Astronomy, Astrophysics and Cosmology (hsv//eng)
Keyword
- stars: AGB and post-AGB
- circumstellar matter
- stars: mass-loss
- stars: winds
- outflows
- globular clusters: individual: NGC 104
- infrared: stars
Publication and Content Type
- ref (subject category)
- art (subject category)
Find in a library
To the university's database
- By the author/editor
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McDonald, I.
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Zijlstra, A. A.
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Lagadec, E.
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Sloan, G. C.
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Boyer, M. L.
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Matsuura, M.
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show more...
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Smith, R. J.
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Smith, C. L.
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Yates, J. A.
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van Loon, J. Th.
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Jones, O. C.
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Ramstedt, Sofia
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Avison, A.
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Justtanont, Kay, ...
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Olofsson, Hans, ...
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Blommaert, J. A. ...
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Goldman, S. R.
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Groenewegen, M. ...
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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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Monthly notices ...
- By the university
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Uppsala University
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Chalmers University of Technology