http://www.aanda.org/index.php?option=com_article&access=doi&doi=10.1051/0004-6361/201014594&Itemid=129 - Copyright ESO 2010, published by EDP Sciences
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stars: general; planetary system; space vehicles: instruments
Abstract :
[en] We present the first far-IR observations of the solar-type stars δ Pav, HR 8501, 51 Peg and ζ2 Ret, taken within the context of the DUNES Herschel open time key programme (OTKP). This project uses the PACS and SPIRE instruments with the objective of studying infrared excesses due to exo-Kuiper belts around nearby solar-type stars. The observed 100 μm fluxes from δ Pav, HR 8501, and 51 Peg agree with the predicted photospheric fluxes, excluding debris disks brighter than Ldust/ ~ 5 × 10-7 (1σ level) around those stars. A flattened, disk-like structure with a semi-major axis of ~100 AU in size is detected around ζ2 Ret. The resolved structure suggests the presence of an eccentric dust ring, which we interpret as an exo-Kuiper belt with Ldust/ ≈ 10-5.
Disciplines :
Space science, astronomy & astrophysics
Author, co-author :
Eiroa, C.; Dpt. FÃsica Teórica, Facultad de Ciencias, Universidad Autónoma de Madrid, Cantoblanco, 28049 Madrid, Spain
Fedele, D.; Dpt. FÃsica Teórica, Facultad de Ciencias, Universidad Autónoma de Madrid, Cantoblanco, 28049 Madrid, Spain ; Max-Planck Institut für Astronomie, Königstuhl 17, 69117 Heidelberg, Germany ; John Hopkins University, Dept. of Physics and Astronomy, 3701 San Martin drive, Baltimore, MD 21210, USA
Maldonado, J.; Dpt. FÃsica Teórica, Facultad de Ciencias, Universidad Autónoma de Madrid, Cantoblanco, 28049 Madrid, Spain
Gonzalez-Garcia, B.
Rodmann, J.; ESA Space Environment and Effects Section, ESTEC, PO Box 299, 2200 AG Noordwijk, The Netherlands
Heras, A. M.; ESA Astrophysics & Fundamental Physics Missions Division, ESTEC/SRE-SA, Keplerlaan 1, 2201 AZ Noordwijk, The Netherlands
Pilbratt, G. L.; ESA Astrophysics & Fundamental Physics Missions Division, ESTEC/SRE-SA, Keplerlaan 1, 2201 AZ Noordwijk, The Netherlands
Mora, A.; ESA-ESAC Gaia SOC. PO Box 78, 28691 Villanueva de la Cañada, Madrid, Spain ; Dpt. FÃsica Teórica, Facultad de Ciencias, Universidad Autónoma de Madrid, Cantoblanco, 28049 Madrid, Spain
Montesinos, B.; LAEX, Centro de AstrobiologÃa (INTA-CSIC), LAEFF Campus, European Space Astronomy Center (ESAC), PO Box 78, 28691 Villanueva de la Cañada, Madrid, Spain
Ardila, D.; NASA Herschel Science Center, California Institute of Technology, 1200 E. California Blvd., Pasadena, CA 91125, USA
Bryden, G.; Jet Propulsion Laboratory, California Institute of Technology, Pasadena, CA 91109, USA
Liseau, R.; Onsala Space Observatory, Chalmers University of Technology, Se-439 92 Onsala, Sweden
Stapelfeldt, K.; Jet Propulsion Laboratory, California Institute of Technology, Pasadena, CA 91109, USA
Solano, E.; LAEX, Centro de AstrobiologÃa (INTA-CSIC), LAEFF Campus, European Space Astronomy Center (ESAC), PO Box 78, 28691 Villanueva de la Cañada, Madrid, Spain
Bayo, A.; European Space Observatory, Alonso de Cordova 3107, Vitacura Casilla 19001, Santiago 19, Chile
Absil, Olivier ; Université de Liège - ULiège > Département d'astrophys., géophysique et océanographie (AGO) > Astroph. extragalactique et observations spatiales (AEOS)
Arevalo, M.
Barrado, D.; LAEX, Centro de AstrobiologÃa (INTA-CSIC), LAEFF Campus, European Space Astronomy Center (ESAC), PO Box 78, 28691 Villanueva de la Cañada, Madrid, Spain
Beichmann, C.; NASA ExoPlanet Science Institute California Inst. of Technology, 1200 E. California Blvd., Pasadena, CA 91125, USA
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
Fukagawa, M.; Nagoya University, Japan
Gutierrez, R.
Grün, E.
Kamp, I.; Kapteyn Astronomical Institute, Postbus 800, 9700 AV Groningen, The Netherlands
Nakagawa, T.; Institute of Space and Astronautical Science (ISAS), Japan Aerospace Exploration Agency (JAXA), 3-1-1, Yoshinodai, Sagamihara, Kanagawa, 229-8510, Japan
Olofsson, G.; Department of Astronomy, Stockholm University, AlbaNova University Center, Roslagstullsbacken 21, 106 91 Stockholm, Sweden
Ribas, I.; Institut de Ciències de l'Espai (CSIC-IEEC), Campus UAB, Facultat de Ciències, Torre C5, parell, 2a pl., 08193 Bellaterra, Barcelona, Spain
Roberge, A.; NASA Goddard Space Flight Center, Exoplanets and Stellar Astrophysics, Code 667, Greenbelt, MD 20771, USA
Sanz-Forcada, J.; LAEX, Centro de AstrobiologÃa (INTA-CSIC), LAEFF Campus, European Space Astronomy Center (ESAC), PO Box 78, 28691 Villanueva de la Cañada, Madrid, Spain
Thébault, P.
Walker, H.; Rutherford Appleton Laboratory, Chilton OX11 0QX, UK
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
