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ALMA Resolves C i E...
ALMA Resolves C i Emission from the β Pictoris Debris Disk
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- Cataldi, Gianni (author)
- Stockholms universitet,Stockholm University,National Astronomical Observatory of Japan,Magyar Tudomanyos Akademia,Hungarian Academy of Sciences,Alba Nova Universitetscentrum,AlbaNova University Center. Stockholm Center for Physics, Astronomy and Biotechnology
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- Brandeker, A. (author)
- Stockholms universitet,Stockholm University,Alba Nova Universitetscentrum,AlbaNova University Center. Stockholm Center for Physics, Astronomy and Biotechnology
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- Wu, Y. (author)
- University of Toronto
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- Chen, C. H. (author)
- Johns Hopkins University,Space Telescope Science Institute (STScI)
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- Dent, W. R. F. (author)
- European Southern Observatory Santiago
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- Vries, B. L. D. (author)
- Alba Nova Universitetscentrum,AlbaNova University Center. Stockholm Center for Physics, Astronomy and Biotechnology,European Space Research and Technology Centre (ESA ESTEC),Stockholms universitet,Stockholm University
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- Kamp, I. (author)
- Rijksuniversiteit Groningen,University of Groningen
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- Liseau, René, 1949 (author)
- Chalmers tekniska högskola,Chalmers University of Technology
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- Olofsson, G. (author)
- Alba Nova Universitetscentrum,AlbaNova University Center. Stockholm Center for Physics, Astronomy and Biotechnology,Stockholms universitet,Stockholm University
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- Pantin, E. (author)
- Centre national de la recherche scientifique (CNRS)
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- Roberge, A. (author)
- NASA Goddard Space Flight Center
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(creator_code:org_t)
- 2018-07-05
- 2018
- English.
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In: Astrophysical Journal. - : American Astronomical Society. - 1538-4357 .- 0004-637X. ; 861:1
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Abstract
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- The debris disk around β Pictoris is known to contain gas. Previous ALMA observations revealed a CO belt at ∼85 au with a distinct clump, interpreted as a location of enhanced gas production. Photodissociation converts CO into C and O within ∼50 a. We resolve C i emission at 492 GHz using ALMA and study its spatial distribution. C i shows the same clump as seen for CO. This is surprising, as C is expected to quickly spread in azimuth. We derive a low C mass (between 5 ×10-4and 3.1 ×10-3), indicating that gas production started only recently (within ∼5000 a). No evidence is seen for an atomic accretion disk inward of the CO belt, perhaps because the gas did not yet have time to spread radially. The fact that C and CO share the same asymmetry argues against a previously proposed scenario where the clump is due to an outward-migrating planet trapping planetesimals in a resonance, nor can the observations be explained by an eccentric planetesimal belt secularly forced by a planet. Instead, we suggest that the dust and gas disks should be eccentric. Such a configuration, we further speculate, might be produced by a recent tidal disruption event. Assuming that the disrupted body has had a CO mass fraction of 10%, its total mass would be 3 MMoon.
Subject headings
- NATURVETENSKAP -- Fysik -- Subatomär fysik (hsv//swe)
- NATURAL SCIENCES -- Physical Sciences -- Subatomic Physics (hsv//eng)
- NATURVETENSKAP -- Fysik -- Astronomi, astrofysik och kosmologi (hsv//swe)
- NATURAL SCIENCES -- Physical Sciences -- Astronomy, Astrophysics and Cosmology (hsv//eng)
Keyword
- stars: individual (beta Pictoris)
- radiative transfer
- methods: observational
- submillimeter: planetary systems
- circumstellar matter
- techniques: interferometric
Publication and Content Type
- art (subject category)
- ref (subject category)
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- By the author/editor
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Cataldi, Gianni
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Brandeker, A.
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Wu, Y.
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Chen, C. H.
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Dent, W. R. F.
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Vries, B. L. D.
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show more...
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Kamp, I.
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Liseau, René, 19 ...
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Olofsson, G.
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Pantin, E.
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Roberge, A.
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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 Subatomic Physic ...
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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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Astrophysical Jo ...
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Chalmers University of Technology