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  • Brandeker, AlexisStockholms universitet,Institutionen för astronomi,Stockholm University (author)

Herschel detects oxygen in the beta Pictoris debris disk

  • Article/chapterEnglish2016

Publisher, publication year, extent ...

  • 2016-06-06
  • EDP Sciences,2016
  • printrdacarrier

Numbers

  • LIBRIS-ID:oai:DiVA.org:su-132536
  • https://urn.kb.se/resolve?urn=urn:nbn:se:su:diva-132536URI
  • https://doi.org/10.1051/0004-6361/201628395DOI
  • https://research.chalmers.se/publication/239081URI

Supplementary language notes

  • Language:English
  • Summary in:English

Part of subdatabase

Classification

  • Subject category:ref swepub-contenttype
  • Subject category:art swepub-publicationtype

Notes

  • The young star beta Pictoris is well known for its dusty debris disk produced through collisional grinding of planetesimals, kilometre-sized bodies in orbit around the star. In addition to dust, small amounts of gas are also known to orbit the star; this gas is likely the result of vaporisation of violently colliding dust grains. The disk is seen edge on and from previous absorption spectroscopy we know that the gas is very rich in carbon relative to other elements. The oxygen content has been more difficult to assess, however, with early estimates finding very little oxygen in the gas at a C/O ratio that is 20x higher than the cosmic value. A C/O ratio that high is difficult to explain and would have far-reaching consequences for planet formation. Here we report on observations by the far-infrared space telescope Herschel, using PACS, of emission lines from ionised carbon and neutral oxygen. The detected emission from C+ is consistent with that previously reported observed by the HIFI instrument on Herschel, while the emission from O is hard to explain without assuming a higher density region in the disk, perhaps in the shape of a clump or a dense torus required to sufficiently excite the O atoms. A possible scenario is that the C/O gas is produced by the same process responsible for the CO clump recently observed by the Atacama Large Millimeter/submillimeter Array in the disk and that the redistribution of the gas takes longer than previously assumed. A more detailed estimate of the C/O ratio and the mass of O will have to await better constraints on the C/O gas spatial distribution.

Subject headings and genre

Added entries (persons, corporate bodies, meetings, titles ...)

  • Cataldi, GianniStockholms universitet,Institutionen för astronomi,Stockholm University(Swepub:su)gica3618 (author)
  • Olofsson, GöranStockholms universitet,Institutionen för astronomi,Stockholm University(Swepub:su)olofsson (author)
  • Vandenbussche, B.Katholieke Universiteit Leuven (author)
  • Acke, B.Katholieke Universiteit Leuven (author)
  • Barlow, M. J.University College London (UCL) (author)
  • Blommaert, J. A. D. L.Katholieke Universiteit Leuven,Vrije Universiteit Brüssel (VUB),Vrije Universiteit Brussel (VUB) (author)
  • Cohen, M.University of California,National Research Council Canada (author)
  • Dent, W. R. F.Atacama Large Millimeter-submillimeter Array (ALMA) (author)
  • Dominik, C.Anton Pannekoek Institute for Astronomy,Radboud Universiteit,Radboud University (author)
  • Di Francesco, J.National Research Council Canada (author)
  • Fridlund, Malcolm,1952Chalmers tekniska högskola,Chalmers University of Technology(Swepub:cth)malfri (author)
  • Gear, W. K.Cardiff University (author)
  • Glauser, A. M.Eidgenössische Technische Hochschule Zürich (ETH),Swiss Federal Institute of Technology in Zürich (ETH),Royal Observatory (author)
  • Greaves, J. S.University of St Andrews (author)
  • Harvey, P. M.The University of Texas at Austin, USA (author)
  • Heras, A. M.European Space Research and Technology Centre (ESA ESTEC) (author)
  • Hogerheijde, M. R.Universiteit Leiden (UL),Leiden University (UL) (author)
  • Holland, W. S.Royal Observatory,STFC Rutherford Appleton Laboratory (author)
  • Huygen, R.Katholieke Universiteit Leuven (author)
  • Ivison, R. J.University of Edinburgh,European Southern Observatory (ESO) (author)
  • Leeks, S. J.STFC Rutherford Appleton Laboratory (author)
  • Lim, T. L.STFC Rutherford Appleton Laboratory (author)
  • Liseau, René,1949Chalmers tekniska högskola,Chalmers University of Technology(Swepub:cth)liseau (author)
  • Matthews, B. C. (author)
  • Pantin, E.Le Commissariat à l’Énergie Atomique et aux Énergies Alternatives (CEA),The French Alternative Energies and Atomic Energy Commission (CEA) (author)
  • Pilbratt, G. L.European Space Research and Technology Centre (ESA ESTEC) (author)
  • Royer, P.Katholieke Universiteit Leuven (author)
  • Sibthorpe, B.Netherlands Institute for Space Research (SRON) (author)
  • Waelkens, C.Katholieke Universiteit Leuven (author)
  • Walker, H. J. (author)
  • Stockholms universitetInstitutionen för astronomi (creator_code:org_t)

Related titles

  • In:Astronomy and Astrophysics: EDP Sciences5910004-63611432-0746

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