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  • Liseau, René,1949Chalmers tekniska högskola,Chalmers University of Technology (author)

Resolving the cold debris disc around a planet-hosting star. PACS photometric imaging observations of q1 Eridani (HD 10647, HR 506)

  • Article/chapterEnglish2010

Publisher, publication year, extent ...

  • 2010-07-16
  • EDP Sciences,2010
  • electronicrdacarrier

Numbers

  • LIBRIS-ID:oai:research.chalmers.se:1656621c-e7ef-4e65-9dae-2aecfbf8c992
  • https://research.chalmers.se/publication/130352URI
  • https://doi.org/10.1051/0004-6361/201014601DOI

Supplementary language notes

  • Language:English
  • Summary in:English

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

Notes

  • Context. About two dozen exo-solar debris systems have been spatially resolved. These debris discs commonly display a variety of structural features such as clumps, rings, belts, excentric distributions and spiral patterns. In most cases, these features are believed to be formed, shaped and maintained by the dynamical influence of planets orbiting the host stars. In very few cases has the presence of the dynamically important planet(s) been inferred from direct observation. Aims. The solar-type star q(1) Eri is known to be surrounded by debris, extended on scales of less than or similar to 30 ''. The star is also known to host at least one planet, albeit on an orbit far too small to make it responsible for structures at distances of tens to hundreds of AU. The aim of the present investigation is twofold: to determine the optical and material properties of the debris and to infer the spatial distribution of the dust, which may hint at the presence of additional planets. Methods. The Photodetector Array Camera and Spectrometer (PACS) aboard the Herschel Space Observatory allows imaging observations in the far infrared at unprecedented resolution, i.e. at better than 6 '' to 12 '' over the wavelength range of 60 mu m to 210 mu m. Together with the results from ground-based observations, these spatially resolved data can be modelled to determine the nature of the debris and its evolution more reliably than what would be possible from unresolved data alone. Results. For the first time has the q(1) Eri disc been resolved at far infrared wavelengths. The PACS observations at 70 mu m, 100 mu m and 160 mu m reveal an oval image showing a disc-like structure in all bands, the size of which increases with wavelength. Assuming a circular shape yields the inclination of its equatorial plane with respect to that of the sky, i > 53 degrees. The results of image de-convolution indicate that i likely is larger than 63 degrees, where 90 degrees corresponds to an edge-on disc. Conclusions. The observed emission is thermal and optically thin. The resolved data are consistent with debris at temperatures below 30 K at radii larger than 120 AU. From image de-convolution, we find that q(1) Eri is surrounded by an about 40 AU wide ring at the radial distance of similar to 85 AU. This is the first real Edgeworth-Kuiper Belt analogue ever observed.

Subject headings and genre

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

  • Eiroa, C.Universidad Autonoma de Madrid (UAM) (author)
  • Fedele, D.Universidad Autonoma de Madrid (UAM),Max Planck Gesellschaft zur Förderung der Wissenschaften e.V. (MPG),Max Planck Society for the Advancement of Science (MPG),Johns Hopkins University (author)
  • Augereau, J. C.Université Grenoble Alpes,Grenoble Alpes University (author)
  • Olofsson, G.Alba Nova Universitetscentrum,AlbaNova University Center. Stockholm Center for Physics, Astronomy and Biotechnology (author)
  • Gonzalez, B.European Space Astronomy Centre (ESAC) (author)
  • Maldonado, J.Universidad Autonoma de Madrid (UAM) (author)
  • Montesinos, B.Centro de Astrobiologia (CAB) (author)
  • Mora, A.European Space Astronomy Centre (ESAC),Universidad Autonoma de Madrid (UAM) (author)
  • Absil, O.Universite de Liège,University of Liège (author)
  • Ardila, D. R.Spitzer Science Center, United States (author)
  • Barrado, D.California Institute of Technology (Caltech),Centro de Astrobiologia (CAB),Calar Alto Astronomical Observatory (author)
  • Bayo, A.Centro de Astrobiologia (CAB),European Southern Observatory Santiago (author)
  • Beichman, C. (author)
  • Bryden, G. (author)
  • Danchi, W.NASA Goddard Space Flight Center (author)
  • del Burgo, C. (author)
  • Ertel, S.Christian-Albrechts-Universität zu Kiel,University of Kiel (author)
  • Fridlund, Malcolm,1952European Space Research and Technology Centre (ESA ESTEC)(Swepub:cth)malfri (author)
  • Heras, A.European Space Research and Technology Centre (ESA ESTEC) (author)
  • Krivov, A.Friedrich-Schiller-Universität Jena,Friedrich Schiller University Jena (author)
  • Launhardt, R.Max Planck Gesellschaft zur Förderung der Wissenschaften e.V. (MPG),Max Planck Society for the Advancement of Science (MPG) (author)
  • Lebreton, J.Université Grenoble Alpes,Grenoble Alpes University (author)
  • Lohne, T.Friedrich-Schiller-Universität Jena,Friedrich Schiller University Jena (author)
  • Marshall, J. P.Open University (author)
  • Meeus, G.Universidad Autonoma de Madrid (UAM) (author)
  • Muller, S.Friedrich-Schiller-Universität Jena,Friedrich Schiller University Jena (author)
  • Pilbratt, G.L.European Space Research and Technology Centre (ESA ESTEC) (author)
  • Roberge, A. (author)
  • Rodmann, J. (author)
  • Solano, E.Centro de Astrobiologia (CAB) (author)
  • Stapelfeldt, K. R. (author)
  • Thebault, P.Observatoire de Paris-Meudon (author)
  • White, G. J.STFC Rutherford Appleton Laboratory,Open University (author)
  • Wolf, S.Christian-Albrechts-Universität zu Kiel,University of Kiel (author)
  • Chalmers tekniska högskolaUniversidad Autonoma de Madrid (UAM) (creator_code:org_t)

Related titles

  • In:Astronomy and Astrophysics: EDP Sciences518:Article Number: L1320004-63611432-0746

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