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Comet-like mineralo...
Comet-like mineralogy of olivine crystals in an extrasolar proto-Kuiper belt
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- de Vries, B. L. (author)
- Katholieke Universiteit Leuven
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- Acke, B. (author)
- Katholieke Universiteit Leuven
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- Blommaert, Jadl (author)
- Katholieke Universiteit Leuven
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- Waelkens, C. (author)
- Katholieke Universiteit Leuven
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- Waters, Lbfm (author)
- Anton Pannekoek Institute for Astronomy,Netherlands Institute for Space Research (SRON)
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- Vandenbussche, B. (author)
- Katholieke Universiteit Leuven
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- Min, M. (author)
- Anton Pannekoek Institute for Astronomy
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- Olofsson, Göran (author)
- Stockholms universitet,Institutionen för astronomi
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- Dominik, C. (author)
- Radboud Universiteit,Radboud University,Anton Pannekoek Institute for Astronomy
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- Decin, L. (author)
- Anton Pannekoek Institute for Astronomy,Katholieke Universiteit Leuven
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- Barlow, M. J. (author)
- University College London (UCL)
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- Brandeker, Alexis (author)
- Stockholms universitet,Institutionen för astronomi
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- Di Francesco, J. (author)
- National Research Council Canada
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- Glauser, A. M. (author)
- Eidgenössische Technische Hochschule Zürich (ETH),Swiss Federal Institute of Technology in Zürich (ETH),Royal Observatory
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Greaves, J. S. (author)
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- Harvey, P. M. (author)
- The University of Texas at Austin, USA
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- Holland, W. S. (author)
- University of Edinburgh,Royal Observatory
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- Ivison, R. J. (author)
- Royal Observatory
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- Liseau, René, 1949 (author)
- Chalmers tekniska högskola,Chalmers University of Technology
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- Pantin, E. (author)
- Centre national de la recherche scientifique (CNRS)
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- Pilbratt, G.L. (author)
- European Space Research and Technology Centre (ESA ESTEC)
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- Royer, P. (author)
- Katholieke Universiteit Leuven
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- Sibthorpe, B. (author)
- Royal Observatory
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(creator_code:org_t)
- 2012-10-03
- 2012
- English.
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In: Nature. - : Springer Science and Business Media LLC. - 0028-0836 .- 1476-4687. ; 490:7418, s. 74-76
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Abstract
Subject headings
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- Some planetary systems harbour debris disks containing planetesimals such as asteroids and comets(1). Collisions between such bodies produce small dust particles(2), the spectral features of which reveal their composition and, hence, that of their parent bodies. A measurement of the composition of olivine crystals (Mg2-2xFe2xSiO4) has been done for the protoplanetary disk HD 100546 (refs 3, 4) and for olivine crystals in the warm inner parts of planetary systems. The latter compares well with the iron-rich olivine in asteroids(5,6) (x approximate to 0.29). In the cold outskirts of the beta Pictoris system, an analogue to the young Solar System, olivine crystals were detected(7) but their composition remained undetermined, leaving unknown how the composition of the bulk of Solar System cometary olivine grains compares with that of extrasolar comets(8,9). Here we report the detection of the 69-micrometre-wavelength band of olivine crystals in the spectrum of beta Pictoris. Because the disk is optically thin, we can associate the crystals with an extrasolar proto-Kuiper belt a distance of 15-45 astronomical units from the star (one astronomical unit is the Sun-Earth distance), determine their magnesium-rich composition (x = 0.01 +/- 0.001) and show that they make up 3.6 +/- 1.0 per cent of the total dust mass. These values are strikingly similar to those for the dust emitted by the most primitive comets in the Solar System(8-10), even though beta Pictoris is more massive and more luminous and has a different planetary system architecture.
Subject headings
- NATURVETENSKAP -- Fysik -- Astronomi, astrofysik och kosmologi (hsv//swe)
- NATURAL SCIENCES -- Physical Sciences -- Astronomy, Astrophysics and Cosmology (hsv//eng)
Keyword
- chondrites
- hd 100546
- spectroscopy
- dust
- debris disks
- protoplanetary disks
- spectra
- beta-pictoris
- silicates
- forsterite
Publication and Content Type
- art (subject category)
- ref (subject category)
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- By the author/editor
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de Vries, B. L.
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Acke, B.
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Blommaert, Jadl
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Waelkens, C.
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Waters, Lbfm
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Vandenbussche, B ...
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show more...
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Min, M.
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Olofsson, Göran
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Dominik, C.
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Decin, L.
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Barlow, M. J.
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Brandeker, Alexi ...
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Di Francesco, J.
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Glauser, A. M.
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Greaves, J. S.
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Harvey, P. M.
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Holland, W. S.
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Ivison, R. J.
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Liseau, René, 19 ...
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Pantin, E.
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Pilbratt, G.L.
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Royer, P.
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Sibthorpe, B.
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show less...
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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 ...
- Articles in the publication
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Nature
- By the university
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Chalmers University of Technology
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Stockholm University