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1. DUst around NEarby Stars. The Survey Observational Results

Author

Eiroa, C, Marshall, J. P, Mora, A, Montesinos, B, Absil, O, Augereau, J. Ch, Bayo, A, Bryden, G, Danchi, W, delBurgo, C, Ertel, S, Fridlund, M, Heras, A. M, Krivov, A. V, Launhardt, R, Liseau, R, Lohne, T, Maldonado, J, Pilbratt, G. L, Roberge, A, Rodman, J, Sanz-Forcada, J, Stapelfeldt, K, Ardila, D, and Beichmann, C

Subjects
Astrophysics
Abstract

Context. Debris discs are a consequence of the planet formation process and constitute the fingerprints of planetesimal systems. Their solar system counterparts are the asteroid and Edgeworth-Kuiper belts.Aims. The DUNES survey aims at detecting extra-solar analogues to the Edgeworth-Kuiper belt around solar-type stars, putting in this way the solar system into context. The survey allows us to address some questions related to the prevalence and properties of planetesimal systems.Methods. We used Herschel PACS to observe a sample of nearby FGK stars. Data at 100 and 160 micron were obtained, complemented in some cases with observations at 70 micron, and at 250, 350 and 500 micron using SPIRE. The observing strategy was to integrate as deep as possible at 100 micron to detect the stellar photosphere. Results. Debris discs have been detected at a fractional luminosity level down to several times that of the Edgeworth-Kuiper belt. The incidence rate of discs around the DUNES stars is increased from a rate of approx. 12.1% +/- 5% before Herschel to approx 20.2 % +/- % 2. A significant fraction (approx. 52%) of the discs are resolved, which represents an enormous step ahead from the previously known resolved discs. Some stars are associated with faint far-IR excesses attributed to a new class of cold discs. Although it cannot be excluded that these excesses are produced by coincidental alignment of background galaxies, statistical arguments suggest that at least some of them are true debris discs. Some discs display peculiar SEDs with spectral indexes in the 70-160 micron range steeper than the Rayleigh-Jeans one. An analysis of the debris disc parameters suggests that a decrease might exist of the mean black body radius from the F-type to the K-type stars. In addition, a weak trend is suggested for a correlation of disc sizes and an anticorrelation of disc temperatures with the stellar age.

Published
2013
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2. DUst around NEarby Stars. The survey observational results

Author

Eiroa, C., Marshall, J. P., Mora, A., Montesinos, B., Absil, O., Augereau, J. Ch., Bayo, A., Bryden, G., Danchi, W., del, Burgo C., Ertel, S., Fridlund, M., Heras, A. M., Krivov, A. V., Launhardt, R., Liseau, R., Lohne, T., Maldonado, J., Pilbratt, G. L., Roberge, A., Rodmann, J., Sanz-Forcada, J., Solano, E., Stapelfeldt, K., Thebault, P., Wolf, S., Ardila, D., Arevalo, M., Beichmann, C., Faramaz, V., Gonzalez-Garcia, B. M., Gutierrez, R., Lebreton, J., Martinez-Arnaiz, R., Meeus, G., Montes, D., Olofsson, G., Su, K. Y. L., White, G. J., Barrado, D., Fukagawa, M., Grun, E., Kamp, I., Lorente, R., Morbidelli, A., Muller, S., Mutschke, H., Ribas, I., Walker, H., Nakagawa, Takao, UAM. Departamento de Física Teórica, Astronomy, Universidad de Granada = University of Granada (UGR), Institut de Planétologie et d'Astrophysique de Grenoble (IPAG ), Observatoire des Sciences de l'Univers de Grenoble (OSUG), Université Joseph Fourier - Grenoble 1 (UJF)-Institut polytechnique de Grenoble - Grenoble Institute of Technology (Grenoble INP )-Institut national des sciences de l'Univers (INSU - CNRS)-Institut national de recherche en sciences et technologies pour l'environnement et l'agriculture (IRSTEA)-Université Savoie Mont Blanc (USMB [Université de Savoie] [Université de Chambéry])-Centre National de la Recherche Scientifique (CNRS)-Université Joseph Fourier - Grenoble 1 (UJF)-Institut polytechnique de Grenoble - Grenoble Institute of Technology (Grenoble INP )-Institut national des sciences de l'Univers (INSU - CNRS)-Institut national de recherche en sciences et technologies pour l'environnement et l'agriculture (IRSTEA)-Université Savoie Mont Blanc (USMB [Université de Savoie] [Université de Chambéry])-Centre National de la Recherche Scientifique (CNRS)-Centre National d'Études Spatiales [Toulouse] (CNES)-Centre National de la Recherche Scientifique (CNRS), Jet Propulsion Laboratory (JPL), NASA-California Institute of Technology (CALTECH), Instituto Nacional de Astrofísica, Óptica y Electrónica (INAOE), Steward Observatory, University of Arizona, Research and Scientific Support Department, ESTEC (RSSD), European Space Research and Technology Centre (ESTEC), Agence Spatiale Européenne = European Space Agency (ESA)-Agence Spatiale Européenne = European Space Agency (ESA), Max-Planck-Institut für Astronomie (MPIA), Max-Planck-Gesellschaft, foreign laboratories (FL), CERN [Genève], University of Granada/Dept of Paediatrics, Agence Spatiale Européenne = European Space Agency (ESA), GSFC Exoplanets and Stellar Astrophysics Laboratory, NASA Goddard Space Flight Center (GSFC), Centro de Astrobiologia [Madrid] (CAB), Instituto Nacional de Técnica Aeroespacial (INTA)-Consejo Superior de Investigaciones Científicas [Madrid] (CSIC), Departamento de Astrofisica [Madrid], Instituto Nacional de Técnica Aeroespacial (INTA)-Consejo Superior de Investigaciones Científicas [Madrid] (CSIC)-Instituto Nacional de Técnica Aeroespacial (INTA)-Consejo Superior de Investigaciones Científicas [Madrid] (CSIC), Laboratoire d'études spatiales et d'instrumentation en astrophysique (LESIA), Université Pierre et Marie Curie - Paris 6 (UPMC)-Institut national des sciences de l'Univers (INSU - CNRS)-Observatoire de Paris, Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL)-Université Paris Diderot - Paris 7 (UPD7)-Centre National de la Recherche Scientifique (CNRS), Dep. de Física Teórica, Universidad Autónoma de Madrid (UAM), Stockholm University, Agence Nationale de gestion des Déchets Radioactifs, SLAC National Accelerator Laboratory (SLAC), Stanford University, National Astronomical Observatory of Japan (NAOJ), Max-Planck-Institut für Kernphysik (MPIK), Kapteyn Astronomical Institute [Groningen], University of Groningen [Groningen], Joseph Louis LAGRANGE (LAGRANGE), Université Nice Sophia Antipolis (1965 - 2019) (UNS), COMUE Université Côte d'Azur (2015-2019) (COMUE UCA)-COMUE Université Côte d'Azur (2015-2019) (COMUE UCA)-Institut national des sciences de l'Univers (INSU - CNRS)-Observatoire de la Côte d'Azur, COMUE Université Côte d'Azur (2015-2019) (COMUE UCA)-Université Côte d'Azur (UCA)-Université Côte d'Azur (UCA)-Centre National de la Recherche Scientifique (CNRS), General Electric Medical Systems [Buc] (GE Healthcare), General Electric Medical Systems, Astrophysical Institute and University Observatory [Jena] (AIU), Friedrich-Schiller-Universität = Friedrich Schiller University Jena [Jena, Germany], Institut de Ciencies de l'Espai [Barcelona] (ICE-CSIC), Consejo Superior de Investigaciones Científicas [Madrid] (CSIC), Universidad de Granada (UGR), Centre National d'Études Spatiales [Toulouse] (CNES)-Centre National de la Recherche Scientifique (CNRS)-Observatoire des Sciences de l'Univers de Grenoble (OSUG), Université Joseph Fourier - Grenoble 1 (UJF)-Institut polytechnique de Grenoble - Grenoble Institute of Technology (Grenoble INP )-Institut national des sciences de l'Univers (INSU - CNRS)-Institut national de recherche en sciences et technologies pour l'environnement et l'agriculture (IRSTEA)-Université Savoie Mont Blanc (USMB [Université de Savoie] [Université de Chambéry])-Centre National de la Recherche Scientifique (CNRS)-Université Joseph Fourier - Grenoble 1 (UJF)-Institut polytechnique de Grenoble - Grenoble Institute of Technology (Grenoble INP )-Institut national des sciences de l'Univers (INSU - CNRS)-Institut national de recherche en sciences et technologies pour l'environnement et l'agriculture (IRSTEA)-Université Savoie Mont Blanc (USMB [Université de Savoie] [Université de Chambéry])-Centre National de la Recherche Scientifique (CNRS), California Institute of Technology (CALTECH)-NASA, European Space Agency (ESA)-European Space Agency (ESA), University of Granada [Granada], European Space Agency (ESA), Universidad Autonoma de Madrid (UAM), Université Côte d'Azur (UCA)-Université Nice Sophia Antipolis (... - 2019) (UNS), COMUE Université Côte d'Azur (2015-2019) (COMUE UCA)-COMUE Université Côte d'Azur (2015-2019) (COMUE UCA)-Observatoire de la Côte d'Azur, and Université Côte d'Azur (UCA)-COMUE Université Côte d'Azur (2015-2019) (COMUE UCA)-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National de la Recherche Scientifique (CNRS)

Subjects
circumstellar matter, planetary systems, infrared, stars, Astrofísica, MODEL ATMOSPHERES, Solar System, Planetesimal, 010504 meteorology & atmospheric sciences, FOS: Physical sciences, Context (language use), Astrophysics, 01 natural sciences, Luminosity, Planet, 0103 physical sciences, PLANETARY SYSTEMS, 010303 astronomy & astrophysics, infrared: stars, Solar and Stellar Astrophysics (astro-ph.SR), ComputingMilieux_MISCELLANEOUS, MASSIVE PLANETS, 0105 earth and related environmental sciences, Physics, [PHYS]Physics [physics], SOLAR-TYPE STARS, NSTARS PROJECT, Física, Astronomy and Astrophysics, TEMPERATURE MINIMUM, Circumstellar matter, Galaxy, Astronomía, Stars, Planetary systems, KUIPER DEBRIS DISK, Astrophysics - Solar and Stellar Astrophysics, Space and Planetary Science, Asteroid, BETA-PICTORIS, stars [Infrared], SUN-LIKE STARS, [PHYS.ASTR]Physics [physics]/Astrophysics [astro-ph], MAIN-SEQUENCE STARS
Abstract

Astronomy and Astrophysics 555 (2013): A11 reproduced with permission from Astronomy & Astrophysics, Context. Debris discs are a consequence of the planet formation process and constitute the fingerprints of planetesimal systems. Their solar system counterparts are the asteroid and Edgeworth-Kuiper belts. Aims. The DUNES survey aims at detecting extra-solar analogues to the Edgeworth-Kuiper belt around solar-type stars, putting in this way the solar system into context. The survey allows us to address some questions related to the prevalence and properties of planetesimal systems. Methods. We used Herschel/PACS to observe a sample of nearby FGK stars. Data at 100 and 160 μm were obtained, complemented in some cases with observations at 70 μm, and at 250, 350 and 500 μm using SPIRE. The observing strategy was to integrate as deep as possible at 100 μm to detect the stellar photosphere. Results. Debris discs have been detected at a fractional luminosity level down to several times that of the Edgeworth-Kuiper belt. The incidence rate of discs around the DUNES stars is increased from a rate of ∼12.1% ± 5% before Herschel to ∼20.2% ± 2%. A significant fraction (∼52%) of the discs are resolved, which represents an enormous step ahead from the previously known resolved discs. Some stars are associated with faint far-IR excesses attributed to a new class of cold discs. Although it cannot be excluded that these excesses are produced by coincidental alignment of background galaxies, statistical arguments suggest that at least some of them are true debris discs. Some discs display peculiar SEDs with spectral indexes in the 70–160 μm range steeper than the Rayleigh-Jeans one. An analysis of the debris disc parameters suggests that a decrease might exist of the mean black body radius from the F-type to the K-type stars. In addition, a weak trend is suggested for a correlation of disc sizes and an anticorrelation of disc temperatures with the stellar age., This work was supported by the Spanish grants AYA2008-01727 and AYA2011-26202, the Marie Curie Actions of the European Commision (FT7-COFUND), AYA2008-02038 and AYA2011-30147-C03-03

Published
2013

3. Cold DUst around NEarby Stars (DUNES). First results

Author

Eiroa, C., Fedele, D., Maldonado, J., Gonzalez-Garcia, B. M., Rodmann, J., Heras, A. M., Pilbratt, G. L., Augereau, J.-Ch., Mora, A., Montesinos, B., Ardila, D., Bryden, G., Liseau, R., Stapelfeldt, K., Launhardt, R., Solano, E., Bayo, A., Absil, O., Arevalo, M., Barrado, D., Beichmann, C., Danchi, W., del, Burgo C., Ertel, S., Fridlund, M., Gutierrez, R., Grun, E., Kamp, I., Krivov, A., Lebreton, J., Lohne, T., Lorente, R., Marshall, J., Martinez-Arnaiz, R., Meeus, G., Montes, D., Morbidelli, A., Muller, S., Mutschke, H., Fukagawa, M., Nakagawa, Takao, Laboratoire de Cosmologie, Astrophysique Stellaire & Solaire, de Planétologie et de Mécanique des Fluides (CASSIOPEE), Université Nice Sophia Antipolis (... - 2019) (UNS), COMUE Université Côte d'Azur (2015-2019) (COMUE UCA)-COMUE Université Côte d'Azur (2015-2019) (COMUE UCA)-Institut national des sciences de l'Univers (INSU - CNRS)-Observatoire de la Côte d'Azur, Université Côte d'Azur (UCA)-COMUE Université Côte d'Azur (2015-2019) (COMUE UCA)-Université Côte d'Azur (UCA)-Centre National de la Recherche Scientifique (CNRS), Astronomy, Universidad Autónoma de Madrid (UAM), Max-Planck-Institut für Astronomie (MPIA), Max-Planck-Gesellschaft, Johns Hopkins University (JHU), European Space Research and Technology Centre (ESTEC), Agence Spatiale Européenne = European Space Agency (ESA), ESA - ESTEC (Netherlands), Laboratoire d'Astrophysique de Grenoble (LAOG), Université Joseph Fourier - Grenoble 1 (UJF)-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National de la Recherche Scientifique (CNRS), Jet Propulsion Laboratory (JPL), NASA-California Institute of Technology (CALTECH), Onsala Space Observatory (OSO), Chalmers University of Technology [Göteborg], Institut d'Astrophysique et de Géophysique [Liège], Université de Liège, NASA ExoPlanet Science Institute (NExScI), California Institute of Technology (CALTECH), NASA Goddard Space Flight Center (GSFC), Nagoya University, Max-Planck-Institut für Kernphysik (MPIK), Kapteyn Astronomical Institute [Groningen], University of Groningen [Groningen], Astrophysikalisches Institut und Universitätssternwarte, Université Nice Sophia Antipolis (1965 - 2019) (UNS), COMUE Université Côte d'Azur (2015-2019) (COMUE UCA)-Université Côte d'Azur (UCA)-Université Côte d'Azur (UCA)-Centre National de la Recherche Scientifique (CNRS), Observatoire de la Côte d'Azur (OCA), Institut national des sciences de l'Univers (INSU - CNRS)-Centre National de la Recherche Scientifique (CNRS), Institute of Space and Astronautical Science (ISAS), Japan Aerospace Exploration Agency [Sagamihara] (JAXA), Institut de Ciencies de l'Espai [Barcelona] (ICE-CSIC), Consejo Superior de Investigaciones Científicas [Madrid] (CSIC), Laboratoire d'études spatiales et d'instrumentation en astrophysique (LESIA), Université Pierre et Marie Curie - Paris 6 (UPMC)-Institut national des sciences de l'Univers (INSU - CNRS)-Observatoire de Paris, Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL)-Université Paris Diderot - Paris 7 (UPD7)-Centre National de la Recherche Scientifique (CNRS), Institut fur Theoretische Physik und Astrophysik [Kiel], and Christian-Albrechts-Universität zu Kiel (CAU)

Subjects
Physics, Astrofísica, 010308 nuclear & particles physics, Infrared, FOS: Physical sciences, Astronomy and Astrophysics, Context (language use), Astrophysics, planetary system, 01 natural sciences, Astronomía, Stars, Astrophysics - Solar and Stellar Astrophysics, Space and Planetary Science, [SDU]Sciences of the Universe [physics], 0103 physical sciences, space vehicles: instruments, 010303 astronomy & astrophysics, stars: general, ComputingMilieux_MISCELLANEOUS, Solar and Stellar Astrophysics (astro-ph.SR)
Abstract

著者人数：49名, Accepted: 2010-05-11, 資料番号: SA1002596000

Published
2010

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