Reference : Herschel discovery of a new class of cold, faint debris discs
Scientific journals : Article
Physical, chemical, mathematical & earth Sciences : Space science, astronomy & astrophysics
http://hdl.handle.net/2268/109545
Herschel discovery of a new class of cold, faint debris discs
English
Eiroa, C. mailto [Dpt. Física Teórica, Facultad de Ciencias, Universidad Autónoma de Madrid, Cantoblanco, 28049, Madrid, Spain]
Marshall, J. P. [Dpt. 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]
Krivov, A. V. [Astrophysikalisches Institut und Universitätssternwarte, Friedrich-Schiller-Universität, Schillergäßchen 2-3, 07745, Jena, Germany]
Montesinos, B. [Dpt. de Astrofísica, Centro de Astrobiología (INTA-CSIC), ESAC Campus, 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)]
Ardila, D. [NASA Herschel Science Center, California Institute of Technology, 1200 E. California Blvd., Pasadena, CA, 91125, USA]
Arévalo, M. [Dpt. de Astrofísica, Centro de Astrobiología (INTA-CSIC), ESAC Campus, PO Box 78, 28691 Villanueva de la Cañada, Madrid, Spain]
Augereau, J.-C. [Université Joseph Fourier/CNRS, Laboratoire d'Astrophysique de Grenoble, UMR 5571, Grenoble, France]
Bayo, A. [European Space Observatory, Alonso de Cordova 3107, Vitacura, Casilla 19001, Santiago 19, Chile]
Danchi, W. [NASA Goddard Space Flight Center, Exoplanets and Stellar Astrophysics, Code 667, Greenbelt, MD, 20771, USA]
Del Burgo, C. [UNINOVA-CA3, Campus da Caparica, Quinta da Torre, Monte de Caparica, 2825-149, Caparica, Portugal]
Ertel, S. [Christian-Albrechts-Universität zu Kiel, Institut für Theoretische Physik und Astrophysik, Leibnizstr. 15, 24098, Kiel, Germany]
Fridlund, M. [ESA Astrophysics & Fundamental Physics Missions Division, ESTEC/SRE-SA, Keplerlaan 1, 2201 AZ, Noordwijk, The Netherlands]
González-García, B. M. [INSA at ESAC, 28691 Villanueva de la Cañada, Madrid, Spain]
Heras, A. M. [ESA Astrophysics & Fundamental Physics Missions Division, ESTEC/SRE-SA, Keplerlaan 1, 2201 AZ, Noordwijk, The Netherlands]
Lebreton, J. [Université Joseph Fourier/CNRS, Laboratoire d'Astrophysique de Grenoble, UMR 5571, Grenoble, France]
Liseau, R. [Onsala Space Observatory, Chalmers University of Technology, 439 92, Onsala, Sweden]
Maldonado, J. [Dpt. Física Teórica, Facultad de Ciencias, Universidad Autónoma de Madrid, Cantoblanco, 28049, Madrid, Spain]
Meeus, G. [Dpt. Física Teórica, Facultad de Ciencias, Universidad Autónoma de Madrid, Cantoblanco, 28049, Madrid, Spain]
Montes, D. [Universidad Complutense de Madrid, Facultad de Ciencias Físicas, Dpt. Astrofísica, Av. Complutense s/n, 28040, Madrid, Spain]
Pilbratt, G. L. [ESA Astrophysics & Fundamental Physics Missions Division, ESTEC/SRE-SA, Keplerlaan 1, 2201 AZ, Noordwijk, The Netherlands]
Roberge, A. [NASA Goddard Space Flight Center, Exoplanets and Stellar Astrophysics, Code 667, Greenbelt, MD, 20771, USA]
Sanz-Forcada, J. [Dpt. de Astrofísica, Centro de Astrobiología (INTA-CSIC), ESAC Campus, PO Box 78, 28691 Villanueva de la Cañada, Madrid, Spain]
Stapelfeldt, K. [Jet Propulsion Laboratory, California Institute of Technology, MS 183-900, 4800 Oak Grove Drive, Pasadena, CA, 91109, USA]
Thébault, P. [LESIA, Observatoire de Paris, 92195, Meudon, France]
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-Dec-2011
Astronomy and Astrophysics
EDP Sciences
536
L4
Yes (verified by ORBi)
International
0004-6361
1432-0746
Les Ulis
France
[en] circumstellar matter ; planetary systems ; stars: individual: αMen (HIP 29271) ; stars: individual: HD 88230 (HIP 49908) ; stars: individual: HD 210277 (HIP 109378)
[en] We present Herschel PACS 100 and 160 μm observations of the solar-type stars α Men, HD 88230 and HD 210277, which form part of the FGK stars sample of the Herschel open time key programme (OTKP) DUNES (DUst around NEarby Stars). Our observations show small infrared excesses at 160 μm for all three stars. HD 210277 also shows a small excess at 100 μm, while the 100 μm fluxes of α Men and HD 88230 agree with the stellar photospheric predictions. We attribute these infrared excesses to a new class of cold, faint debris discs. Both α Men and HD 88230 are spatially resolved in the PACS 160 μm images, while HD 210277 is point-like at that wavelength. The projected linear sizes of the extended emission lie in the range from ~115 to ≤ 250 AU. The estimated black body temperatures from the 100 and 160 μm fluxes are ≲22 K, and the fractional luminosity of the cold dust is L[SUB]dust[/SUB]/L[SUB] ⋆ [/SUB] ~ 10[SUP]-6[/SUP], close to the luminosity of the solar-system's Kuiper belt. These debris discs are the coldest and faintest discs discovered so far around mature stars, so they cannot be explained easily invoking "classical" debris disc models. 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/2268/109545
10.1051/0004-6361/201117797
http://adsabs.harvard.edu/abs/2011A%26A...536L...4E
http://www.aanda.org/index.php?option=com_article&access=doi&doi=10.1051/0004-6361/201117797&Itemid=129 Copyright ESO 2011, published by EDP Sciences
http://de.arxiv.org/abs/1110.4826

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