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Herschel observatio...
Herschel observations of the debris disc around HIP 92043
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- Marshall, J. P. (author)
- Universidad Autonoma de Madrid (UAM)
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- Krivov, A. (author)
- Friedrich-Schiller-Universität Jena,Friedrich Schiller University Jena
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- del Burgo, C. (author)
- Instituto Nacional de Astrofísica, Óptica y Electrońica (INAOE),National Institute of Astrophysics, Optics and Electronics (INAOE)
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- Eiroa, C. (author)
- Universidad Autonoma de Madrid (UAM)
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- Mora, A. (author)
- European Space Astronomy Centre (ESAC)
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- Montesinos, B. (author)
- Centro de Astrobiologia (CAB)
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- Ertel, S. (author)
- Christian-Albrechts-Universität zu Kiel,University of Kiel,Université Grenoble Alpes,Grenoble Alpes University
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Bryden, G. (author)
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- Liseau, René, 1949 (author)
- Chalmers tekniska högskola,Chalmers University of Technology
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- Augereau, J. C. (author)
- Université Grenoble Alpes,Grenoble Alpes University
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Bayo, A. (author)
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- Danchi, W. (author)
- NASA Goddard Space Flight Center
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- Lohne, T. (author)
- Friedrich-Schiller-Universität Jena,Friedrich Schiller University Jena
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- Maldonado, J. (author)
- Universidad Autonoma de Madrid (UAM)
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- Pilbratt, G.L. (author)
- European Space Research and Technology Centre (ESA ESTEC)
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- Stapelfeldt, K. R. (author)
- NASA Goddard Space Flight Center
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- Thebault, P. (author)
- Observatoire de Paris-Meudon,Université Grenoble Alpes,Grenoble Alpes University
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- White, G. J. (author)
- STFC Rutherford Appleton Laboratory,Open University
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- Wolf, S. (author)
- Christian-Albrechts-Universität zu Kiel,University of Kiel
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(creator_code:org_t)
- 2013-08-30
- 2013
- English.
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In: Astronomy and Astrophysics. - : EDP Sciences. - 0004-6361 .- 1432-0746. ; 557
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Abstract
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- Context. Typical debris discs are composed of particles ranging from several micron sized dust grains to km sized asteroidal bodies, and their infrared emission peaks at wavelengths 60-100 mu m. Recent Herschel DUNES observations have identified several debris discs around nearby Sun-like stars (F, G and K spectral type) with significant excess emission only at 160 mu m.Aims. We observed HIP 92043 (110 Her, HD 173667) at far-infrared and sub-millimetre wavelengths with Herschel PACS and SPIRE. Identification of the presence of excess emission from HIP 92043 and the origin and physical properties of any excess was undertaken through analysis of its spectral energy distribution (SED) and the PACS images.Methods. The PACS and SPIRE images were produced using the HIPE photProject map maker routine. Fluxes were measured using aperture photometry. A stellar photosphere model was scaled to optical and near infrared photometry and subtracted from the far-infared and sub-mm fluxes to determine the presence of excess emission. Source radial profiles were fitted using a 2D Gaussian and compared to a PSF model based on Herschel observations of alpha Boo to check for extended emission.Results. Clear excess emission from HIP 92043 was observed at 70 and 100 mu m. Marginal excess was observed at 160 and 250 mu m. Analysis of the images reveals that the source is extended at 160 mu m. A fit to the source SED is inconsistent with a photosphere and single temperature black body.Conclusions. The excess emission from HIP 92043 is consistent with the presence of an unresolved circumstellar debris disc at 70 and 100 mu m, with low probability of background contamination. The extended 160 mu m emission may be interpreted as an additional cold component to the debris disc or as the result of background contamination along the line of sight. The nature of the 160 mu m excess cannot be determined absolutely from the available data, but we favour a debris disc interpretation, drawing parallels with previously identified cold disc sources in the DUNES sample.
Subject headings
- NATURVETENSKAP -- Fysik -- Astronomi, astrofysik och kosmologi (hsv//swe)
- NATURAL SCIENCES -- Physical Sciences -- Astronomy, Astrophysics and Cosmology (hsv//eng)
Keyword
- circumstellar matter
- Infrared: stars
- Stars: individual: HIP 92043 (110 Her
- HD 173667)
Publication and Content Type
- art (subject category)
- ref (subject category)
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- By the author/editor
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Marshall, J. P.
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Krivov, A.
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del Burgo, C.
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Eiroa, C.
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Mora, A.
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Montesinos, B.
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show more...
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Ertel, S.
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Bryden, G.
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Liseau, René, 19 ...
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Augereau, J. C.
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Bayo, A.
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Danchi, W.
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Lohne, T.
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Maldonado, J.
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Pilbratt, G.L.
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Stapelfeldt, K. ...
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Thebault, P.
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White, G. J.
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Wolf, S.
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Chalmers University of Technology