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Mikkel Nørup Lund

Oscillating Red Giants Observed during Campaign 1 of the Kepler K2 Mission: New Prospects for Galactic Archaeology

Publikation: Bidrag til tidsskrift/Konferencebidrag i tidsskrift /Bidrag til avisTidsskriftartikelForskningpeer review

  • Dennis Stello
  • Daniel Huber
  • ,
  • Sanjib Sharma, Sydney Institute for Astronomy (SIfA), School of Physics, University of Sydney, Sydney, NSW 2006, Australia, Danmark
  • Jennifer Johnson, Department of Astronomy, The Ohio State University, 140 West 18th Avenue, Columbus, OH 43210, USA
  • ,
  • Mikkel N. Lund
  • Rasmus Handberg
  • Derek L. Buzasi, Department of Chemistry and Physics, Florida Gulf Coast University, Fort Myers, FL 33965, USA
  • ,
  • Victor Silva Aguirre
  • William J. Chaplin, School of Physics & Astronomy, University of Birmingham, Edgbaston Park Road, West Midlands, Birmingham B15 2TT, UK
  • ,
  • Andrea Miglio, School of Physics & Astronomy, University of Birmingham, Edgbaston Park Road, West Midlands, Birmingham B15 2TT, UK
  • ,
  • Marc Pinsonneault, Department of Astronomy, The Ohio State University, 140 West 18th Avenue, Columbus, OH 43210, USA
  • ,
  • Sarbani Basu, Department of Astronomy, Yale University, P.O. Box 208101, New Haven, CT 06520-8101, USA
  • ,
  • Tim R. Bedding
  • ,
  • Joss Bland-Hawthorn, Sydney Institute for Astronomy (SIfA), School of Physics, University of Sydney, Sydney, NSW 2006, Australia, Danmark
  • Luca Casagrande, Research School of Astronomy & Astrophysics, Mount Stromlo Observatory, The Australian National University, Weston Creek, ACT 2611, Australia
  • ,
  • Guy Davies, School of Physics & Astronomy, University of Birmingham, Edgbaston Park Road, West Midlands, Birmingham B15 2TT, UK
  • ,
  • Yvonne Elsworth, School of Physics & Astronomy, University of Birmingham, Edgbaston Park Road, West Midlands, Birmingham B15 2TT, UK
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  • Rafael A. Garcia, Laboratoire AIM, CEA/DSM - CNRS - Univ. Paris Diderot - IRFU/SAp, Centre de Saclay, 91191, Gif-sur-Yvette Cedex, France
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  • Savita Mathur, Space Science Institute, 4750 Walnut street, Suite 205, Boulder, CO 80301, USA 0000-0003-4034-0416
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  • Maria Pia Di Mauro, INAF-IAPS, Istituto di Astrofisica e Planetologia Spaziali, Via del Fosso del Cavaliere 100, I-00133 Roma, Italy
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  • Benoit Mosser, LESIA, Observatoire de Paris, PSL Research University, CNRS, Université Pierre et Marie Curie, Université Paris Diderot, F-92195 Meudon, France cedex, France
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  • Donald P. Schneider, Institute for Gravitation and the Cosmos, The Pennsylvania State University, University Park, PA 16802, USA
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  • Aldo Serenelli, Instituto de Ciencias del Espacio (ICE-CSIC/IEEC) Campus UAB, Carrer de Can Magrans, s/n E-08193 Cerdanyola del Valls, Spain
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  • Marica Valentini, Leibnitz Institute für Astrophysics (AIP), Potsdam, Germany, Danmark
NASA’s re-purposed Kepler mission—dubbed K2—has brought new scientific opportunities that were not anticipated for the original Kepler mission. One science goal that makes optimal use of K2's capabilities, in particular its 360° ecliptic field of view, is galactic archaeology—the study of the evolution of the Galaxy from the fossil stellar record. The thrust of this research is to exploit high-precision, time-resolved photometry from K2 in order to detect oscillations in red giant stars. This asteroseismic information can provide estimates of stellar radius (hence distance), mass, and age of vast numbers of stars across the Galaxy. Here we present the initial analysis of a subset of red giants, observed toward the north galactic gap, during the mission’s first full science campaign. We investigate the feasibility of using K2 data for detecting oscillations in red giants that span a range in apparent magnitude and evolutionary state (hence intrinsic luminosity). We demonstrate that oscillations are detectable for essentially all cool giants within the {log}g range ˜1.9-3.2. Our detection is complete down to {\text{Kp}} ˜ 14.5, which results in a seismic sample with little or no detection bias. This sample is ideally suited to stellar population studies that seek to investigate potential shortcomings of contemporary Galaxy models.
OriginalsprogEngelsk
ArtikelnummerL3
TidsskriftThe Astrophysical Journal Letters
Vol/bind809
Nummer1
Antal sider6
DOI
StatusUdgivet - 1 aug. 2015

    Forskningsområder

  • Galaxy: evolution, Galaxy: stellar content, Galaxy: structure, stars: fundamental parameters, stars: oscillations

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