Reference : Modelling the huge, Herschel-resolved debris ring around HD 207129
Scientific journals : Article
Physical, chemical, mathematical & earth Sciences : Space science, astronomy & astrophysics
http://hdl.handle.net/2268/109563
Modelling the huge, Herschel-resolved debris ring around HD 207129
English
Löhne, T. mailto [Astrophysikalisches Institut und Universitätssternwarte, Friedrich-Schiller-Universität Jena, Schillergäßchen 2-3, 07745, Jena, Germany]
Augereau, J.-C. [UJF-Grenoble 1/CNRS-INSU, Institut de Planétologie et d'Astrophysique de Grenoble (IPAG) UMR 5274, 38041, Grenoble, France]
Ertel, S. [Christian-Albrechts-Universität zu Kiel, Institut für Theoretische Physik und Astrophysik, Leibnizstr. 15, 24098, Kiel, Germany]
Marshall, J. P. [Departmento Física Teórica, Facultad de Ciencias, Universidad Autónoma de Madrid, Cantoblanco, 28049, Madrid, Spain]
Eiroa, C. [Departmento Física Teórica, Facultad de Ciencias, Universidad Autónoma de Madrid, Cantoblanco, 28049, Madrid, Spain]
Mora, A. [ESA-ESAC Gaia SOC., PO Box 78, 28691, Villanueva de la Cañada Madrid, Spain]
Absil, Olivier mailto [Université de Liège - ULg > Département d'astrophys., géophysique et océanographie (AGO) > Astroph. extragalactique et observations spatiales (AEOS)]
Stapelfeldt, K. [Jet Propulsion Laboratory, California Institute of Technology, Pasadena, CA, 91109, USA]
Thébault, P. [LESIA, Observatoire de Paris, 92195, Meudon Principal Cedex, France]
Bayo, A. [European Southern Observatory, Alonso de Córdova 3107, Vitacura, Santiago, Chile]
Del Burgo, C. [UNINOVA-CA3, Campus da Caparica, Quinta da Torre, Monte de Caparica, 2825-149, Caparica, Portugal]
Danchi, W. [NASA Goddard Space Flight Center, Exoplanets and Stellar Astrophysics, Code 667, Greenbelt, MD, 20771, USA]
Krivov, A. V. [Astrophysikalisches Institut und Universitätssternwarte, Friedrich-Schiller-Universität Jena, Schillergäßchen 2-3, 07745, Jena, Germany]
Lebreton, J. [UJF-Grenoble 1/CNRS-INSU, Institut de Planétologie et d'Astrophysique de Grenoble (IPAG) UMR 5274, 38041, Grenoble, France]
Letawe, Géraldine mailto [Université de Liège - ULg > Département d'astrophys., géophysique et océanographie (AGO) > Département d'astrophys., géophysique et océanographie (AGO) >]
Magain, Pierre [Université de Liège - ULg > Département d'astrophys., géophysique et océanographie (AGO) > Astrophysique et traitement de l'image]
Maldonado, J. [Departmento Física Teórica, Facultad de Ciencias, Universidad Autónoma de Madrid, Cantoblanco, 28049, Madrid, Spain]
Montesinos, B. [Departmento de Astrofísica, Centro de Astrobiología (CAB, CSIC-INTA), ESAC Campus, PO Box 78, 28691 Villanueva de la Cañada, Madrid, Spain]
Pilbratt, G. L. [ESA Astrophysics & Fundamental Physics Missions Division, ESTEC/SRE-SA, Keplerlaan 1, 2201 AZ, Noordwijk, The Netherlands]
White, G. J. [Department of Physics and Astrophysics, Open University, Walton Hall, Milton Keynes, MK7 6AA, UK; Rutherford Appleton Laboratory, Chilton, OX11 0QX, UK]
Wolf, S. [Christian-Albrechts-Universität zu Kiel, Institut für Theoretische Physik und Astrophysik, Leibnizstr. 15, 24098, Kiel, Germany]
1-Jan-2012
Astronomy and Astrophysics
EDP Sciences
537
A110
Yes (verified by ORBi)
International
0004-6361
1432-0746
Les Ulis
France
[en] interplanetary medium ; stars: individual: HD 207129
[en] Debris disks, which are inferred from the observed infrared excess to be ensembles of dust, rocks, and probably planetesimals, are common features of stellar systems. As the mechanisms of their formation and evolution are linked to those of planetary bodies, they provide valuable information. The few well-resolved debris disks are even more valuable because they can serve as modelling benchmarks and help resolve degeneracies in modelling aspects such as typical grain sizes and distances. Here, we present an analysis of the HD 207129 debris disk, based on its well-covered spectral energy distribution and Herschel/PACS images obtained in the framework of the DUNES (DUst around NEarby Stars) programme. We use an empirical power-law approach to the distribution of dust and we then model the production and removal of dust by means of collisions, direct radiation pressure, and drag forces. The resulting best-fit model contains a total of nearly 10[SUP]-2[/SUP] Earth masses in dust, with typical grain sizes in the planetesimal belt ranging from 4 to 7 μm. We constrain the dynamical excitation to be low, which results in very long collisional lifetimes and a drag that notably fills the inner gap, especially at 70 μm. The radial distribution stretches from well within 100 AU in an unusual, outward-rising slope towards a rather sharp outer edge at about 170-190 AU. The inner edge is therefore smoother than that reported for Fomalhaut, but the contribution from the extended halo of barely bound grains is similarly small. Both slowly self-stirring and planetary perturbations could potentially have formed and shaped this disk. Herschel is an ESA space observatory with science instruments provided by European-led Principal Investigator consortia and with important participation from NASA.
Researchers
http://hdl.handle.net/2268/109563
10.1051/0004-6361/201117731
http://adsabs.harvard.edu/abs/2012A%26A...537A.110L
http://www.aanda.org/index.php?option=com_article&access=doi&doi=10.1051/0004-6361/201117731&Itemid=129 Copyright ESO 2012, published by EDP Sciences

File(s) associated to this reference

Fulltext file(s):

FileCommentaryVersionSizeAccess
Open access
aa17731-11.pdfPublisher postprint3.27 MBView/Open

Bookmark and Share SFX Query

All documents in ORBi are protected by a user license.