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A Herschel resolved far-infrared dust ring around HD 207129

J. P. Marshall ; T. Lohne ; B. Montesinos ; A. V. Krivov ; C. Eiroa ; O. Absil ; G. Bryden ; J. Maldonado ; A. Mora ; J. Sanz-Forcada ; D. Ardila ; J. C. Augereau ; A. Bayo ; C. del Burgo ; W. Danchi ; S. Ertel ; D. Fedele ; M. Fridlund ; J. Lebreton ; B. M. Gonzalez-Garcia ; René Liseau (Institutionen för rymd- och geovetenskap, Radioastronomi och astrofysik) ; G. Meeus ; S. Muller ; G. L. Pilbratt ; A. Roberge ; K. Stapelfeldt ; P. Thebault ; G. J. White ; S. Wolf
Astronomy & Astrophysics (0004-6361). Vol. 529 (2011),
[Artikel, refereegranskad vetenskaplig]

Context. Dusty debris discs around main sequence stars are thought to be the result of continuous collisional grinding of planetesimals in the system. The majority of these systems are unresolved and analysis of the dust properties is limited by the lack of information regarding the dust location. Aims. The Herschel DUNES key program is observing 133 nearby, Sun-like stars (<20 pc, FGK spectral type) in a volume limited survey to constrain the absolute incidence of cold dust around these stars by detection of far infrared excess emission at flux levels comparable to the Edgeworth-Kuiper belt (EKB). Methods. We have observed the Sun-like star HD 207129 with Herschel PACS and SPIRE. In all three PACS bands we resolve a ring-like structure consistent with scattered light observations. Using alpha Bootis as a reference point spread function (PSF), we deconvolved the images, clearly resolving the inner gap in the disc at both 70 and 100 mu m. Results. We have resolved the dust-producing planetesimal belt of a debris disc at 100 mu m for the first time. We measure the radial profile and fractional luminosity of the disc, and compare the values to those of discs around stars of similar age and/or spectral type, placing this disc in context of other resolved discs observed by Herschel/DUNES.

Nyckelord: stars: individual: HD 207129, circumstellar matter, infrared: stars, main-sequence stars, vega-type stars, nearby stars, debris disks, beta-pictoris, q(1) eridani, planet, search, space, belt



Denna post skapades 2011-06-07. Senast ändrad 2011-11-07.
CPL Pubid: 141380

 

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