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THE AU MIC DEBRIS D...
THE AU MIC DEBRIS DISK : FAR-INFRARED AND SUBMILLIMETER RESOLVED IMAGING
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- Matthews, Brenda C. (author)
- National Research Council Canada,University of Victoria
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- Kennedy, Grant (author)
- University Of Cambridge
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- Sibthorpe, Bruce (author)
- Netherlands Institute for Space Research (SRON)
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- Holland, Wayne (author)
- Royal Observatory,University of Edinburgh
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- Booth, Mark (author)
- Pontificia Universidad Catolica de Chile
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- Kalas, Paul (author)
- University of California,SETI Institute
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- MacGregor, Meredith (author)
- Harvard-Smithsonian Center for Astrophysics,Universiteit Leiden (UL),Leiden University (UL)
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- Wilner, David (author)
- Harvard-Smithsonian Center for Astrophysics
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- Vandenbussche, Bart (author)
- Katholieke Universiteit Leuven
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- Olofsson, Göran (author)
- Stockholms universitet,Institutionen för astronomi,Alba Nova Universitetscentrum,AlbaNova University Center. Stockholm Center for Physics, Astronomy and Biotechnology
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Blommaert, Joris (author)
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- Brandeker, Alexis (author)
- Stockholms universitet,Institutionen för astronomi,Alba Nova Universitetscentrum,AlbaNova University Center. Stockholm Center for Physics, Astronomy and Biotechnology
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- Dent, W. R. F. (author)
- Atacama Large Millimeter-submillimeter Array (ALMA)
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- de Vries, Bernard L. (author)
- Stockholms universitet,Institutionen för astronomi,Stockholm University,Alba Nova Universitetscentrum,AlbaNova University Center. Stockholm Center for Physics, Astronomy and Biotechnology
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- Di Francesco, James (author)
- University of Victoria,National Research Council Canada
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- Fridlund, Malcolm, 1952 (author)
- Chalmers tekniska högskola,Chalmers University of Technology
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- Graham, James R. (author)
- University of California
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- Greaves, Jane (author)
- University of St Andrews
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- Heras, Ana M. (author)
- European Space Research and Technology Centre (ESA ESTEC)
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Hogerheijde, Michiel (author)
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- Ivison, R. J. (author)
- University of Edinburgh,European Southern Observatory (ESO)
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- Pantin, Eric (author)
- Centre national de la recherche scientifique (CNRS)
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- Pilbratt, Goran L. (author)
- European Space Research and Technology Centre (ESA ESTEC)
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- Blommaert, Jadl (author)
- Vlaamse Instelling voor Technologisch Onderzoek (VITO),Flemish Institute for Technological Research,Vrije Universiteit Brüssel (VUB),Vrije Universiteit Brussel (VUB)
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(creator_code:org_t)
- 2015
- 2015
- English.
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In: Astrophysical Journal. - 0004-637X .- 1538-4357. ; 811:2
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http://publications.... (primary) (free)
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https://urn.kb.se/re...
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https://doi.org/10.1...
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Abstract
Subject headings
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- We present far-infrared and submillimeter maps from the Herschel Space Observatory and the James Clerk Maxwell Telescope of the debris disk host star AU Microscopii. Disk emission is detected at 70, 160, 250, 350, 450, 500, and 850 mu m. The disk is resolved at 70, 160, and 450 mu m. In addition to the planetesimal belt, we detect thermal emission from AU Mic's halo for the first time. In contrast to the scattered light images, no asymmetries are evident in the disk. The fractional luminosity of the disk is 3.9 x 10(-4) and its milimeter-grain dust mass is 0.01 M-circle dot (+/- 20%). We create a simple spatial model that reconciles the disk spectral energy distribution as a blackbody of 53 +/- 2K (a composite of 39 and 50 K components) and the presence of small (non-blackbody) grains which populate the extended halo. The best-fit model is consistent with the birth ring model explored in earlier works, i.e., an edge-on dust belt extending from 8.8 to 40 AU, but with an additional halo component with an r(-1.5) surface density profile extending to the limits of sensitivity (140 AU). We confirm that AU Mic does not exert enough radiation force to blow out grains. For stellar mass-loss rates of 10-100 times solar, compact (zero porosity) grains can only be removed if they are very small; consistently with previous work, if the porosity is 0.9, then grains approaching 0.1 mu m can be removed via corpuscular forces (i.e., the stellar wind).
Subject headings
- NATURVETENSKAP -- Fysik -- Astronomi, astrofysik och kosmologi (hsv//swe)
- NATURAL SCIENCES -- Physical Sciences -- Astronomy, Astrophysics and Cosmology (hsv//eng)
Keyword
- circumstellar matter
- stars: individual (AU Mic)
Publication and Content Type
- ref (subject category)
- art (subject category)
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- By the author/editor
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Matthews, Brenda ...
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Kennedy, Grant
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Sibthorpe, Bruce
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Holland, Wayne
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Booth, Mark
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Kalas, Paul
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show more...
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MacGregor, Mered ...
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Wilner, David
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Vandenbussche, B ...
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Olofsson, Göran
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Blommaert, Joris
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Brandeker, Alexi ...
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Dent, W. R. F.
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de Vries, Bernar ...
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Di Francesco, Ja ...
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Fridlund, Malcol ...
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Graham, James R.
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Greaves, Jane
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Heras, Ana M.
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Hogerheijde, Mic ...
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Ivison, R. J.
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Pantin, Eric
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Pilbratt, Goran ...
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Blommaert, Jadl
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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 ...
- By the university
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Stockholm University
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Chalmers University of Technology