Reference : Solar-like Oscillations in Low-luminosity Red Giants: First Results from Kepler
Scientific journals : Article
Physical, chemical, mathematical & earth Sciences : Space science, astronomy & astrophysics
http://hdl.handle.net/2268/75538
Solar-like Oscillations in Low-luminosity Red Giants: First Results from Kepler
English
Bedding, T. R. [Sydney Institute for Astronomy (SIfA), School of Physics, University of Sydney, NSW 2006, Australia]
Huber, D. [Sydney Institute for Astronomy (SIfA), School of Physics, University of Sydney, NSW 2006, Australia]
Stello, D. [Sydney Institute for Astronomy (SIfA), School of Physics, University of Sydney, NSW 2006, Australia]
Elsworth, Y. P. [School of Physics and Astronomy, University of Birmingham, Birmingham B15 2TT, UK]
Hekker, S. [School of Physics and Astronomy, University of Birmingham, Birmingham B15 2TT, UK]
Kallinger, T. [Department of Physics and Astronomy, University of British Columbia, Vancouver, Canada ; Institute of Astronomy, University of Vienna, 1180 Vienna, Austria]
Mathur, S. [Indian Institute of Astrophysics, Koramangala, Bangalore 560034, India]
Mosser, B. [LESIA, CNRS, Université Pierre et Marie Curie, Université Denis, Diderot, Observatoire de Paris, 92195 Meudon Cedex, France]
Preston, H. L. [Eureka Scientific, 2452 Delmer Street Suite 100, Oakland, CA 94602-3017, USA ; Department of Mathematical Sciences, University of South Africa, Box 392 UNISA 0003, South Africa]
Ballot, J. [Laboratoire d'Astrophysique de Toulouse-Tarbes Université de Toulouse, CNRS 14 av E. Belin 31400 Toulouse, France]
Barban, C. [LESIA, CNRS, Université Pierre et Marie Curie, Université Denis, Diderot, Observatoire de Paris, 92195 Meudon Cedex, France]
Broomhall, A. M. [School of Physics and Astronomy, University of Birmingham, Birmingham B15 2TT, UK]
Buzasi, D. L. [Eureka Scientific, 2452 Delmer Street Suite 100, Oakland, CA 94602-3017, USA]
Chaplin, W. J. [School of Physics and Astronomy, University of Birmingham, Birmingham B15 2TT, UK]
Garcí­a, R. A. [Laboratoire AIM, CEA/DSM-CNRS, Université Paris 7 Diderot, IRFU/SAp, Centre de Saclay, 91191, Gif-sur-Yvette, France]
Gruberbauer, M. [Department of Astronomy and Physics, Saint Mary's University, Halifax, NS B3H 3C3, Canada]
Hale, S. J. [School of Physics and Astronomy, University of Birmingham, Birmingham B15 2TT, UK]
De Ridder, J. [Instituut voor Sterrenkunde, K.U.Leuven, Belgium]
Frandsen, S. [Danish AsteroSeismology Centre (DASC), Department of Physics and Astronomy, Aarhus University, DK-8000 Aarhus C, Denmark]
Borucki, W. J. [NASA Ames Research Center, MS 244-30, Moffett Field, CA 94035, USA]
Brown, T. [Las Cumbres Observatory Global Telescope, Goleta, CA 93117, USA]
Christensen-Dalsgaard, J. [Danish AsteroSeismology Centre (DASC), Department of Physics and Astronomy, Aarhus University, DK-8000 Aarhus C, Denmark]
Gilliland, R. L. [Space Telescope Science Institute, 3700 San Martin Drive, Baltimore, MD 21218, USA]
Jenkins, J. M. [SETI Institute/NASA Ames Research Center, MS 244-30, Moffett Field, CA 94035, USA]
Kjeldsen, H. [Danish AsteroSeismology Centre (DASC), Department of Physics and Astronomy, Aarhus University, DK-8000 Aarhus C, Denmark]
Koch, D. [NASA Ames Research Center, MS 244-30, Moffett Field, CA 94035, USA]
Belkacem, Kevin [Université de Liège - ULg > Département d'astrophys., géophysique et océanographie (AGO) > Astrophysique stellaire théorique et astérosismologie >]
Bildsten, L. [Kavli Institute for Theoretical Physics and Department of Physics, University of California, Santa Barbara, CA 93106, USA]
Bruntt, H. [LESIA, CNRS, UniversitéPierre et Marie Curie, Université Denis, Diderot, Observatoire de Paris, 92195 Meudon Cedex, France ; Danish AsteroSeismology Centre (DASC), Department of Physics and Astronomy, Aarhus University, DK-8000 Aarhus C, Denmark]
Campante, T. L. [Danish AsteroSeismology Centre (DASC), Department of Physics and Astronomy, Aarhus University, DK-8000 Aarhus C, Denmark ; Centro de Astrofísica da Universidade do Porto, Rua das Estrelas, 4150-762 Porto, Portugal]
Deheuvels, S. [LESIA, CNRS, Université Pierre et Marie Curie, Université Denis, Diderot, Observatoire de Paris, 92195 Meudon Cedex, France]
Derekas, A. [Sydney Institute for Astronomy (SIfA), School of Physics, University of Sydney, NSW 2006, Australia ; Konkoly Observatory of the Hungarian Academy of Sciences, H-1525 Budapest, P.O. Box 67, Hungary]
Dupret, Marc-Antoine [Université de Liège - ULg > Département d'astrophys., géophysique et océanographie (AGO) > Astrophysique stellaire théorique et astérosismologie >]
Goupil, M.-J. [LESIA, CNRS, Université Pierre et Marie Curie, Université Denis, Diderot, Observatoire de Paris, 92195 Meudon Cedex, France]
Hatzes, A. [Thueringer Landessternwarte Tautenburg, Sternwarte 5, D-07778, Tautenburg, Germany]
Houdek, G. [Institute of Astronomy, University of Vienna, 1180 Vienna, Austria]
Ireland, M. J. [Sydney Institute for Astronomy (SIfA), School of Physics, University of Sydney, NSW 2006, Australia]
Jiang, C. [Department of Astronomy, Beijing Normal University, China]
Karoff, C. [School of Physics and Astronomy, University of Birmingham, Birmingham B15 2TT, UK]
Kiss, L. L. [Sydney Institute for Astronomy (SIfA), School of Physics, University of Sydney, NSW 2006, Australia ; Konkoly Observatory of the Hungarian Academy of Sciences, H-1525 Budapest, P.O. Box 67, Hungary]
Lebreton, Y. [LESIA, CNRS, Université Pierre et Marie Curie, Université Denis, Diderot, Observatoire de Paris, 92195 Meudon Cedex, France]
Miglio, Andrea mailto [Université de Liège - ULg > Département d'astrophys., géophysique et océanographie (AGO) > Astrophysique stellaire théorique et astérosismologie >]
Montalban Iglesias, Josefa mailto [Université de Liège - ULg > Département d'astrophys., géophysique et océanographie (AGO) > Astrophysique stellaire théorique et astérosismologie >]
Noels-Grötsch, Arlette [Université de Liège - ULg > Département d'astrophys., géophysique et océanographie (AGO) > Département d'astrophys., géophysique et océanographie (AGO) >]
Roxburgh, I. W. [Queen Mary University of London, Mile End Road, London E1 4NS, UK]
Sangaralingam, V. [School of Physics and Astronomy, University of Birmingham, Birmingham B15 2TT, UK]
Stevens, I. R. [School of Physics and Astronomy, University of Birmingham, Birmingham B15 2TT, UK]
Suran, M. D. [Astronomical Institute of the Romanian Academy, Str. Cutitul de Argint, 5, RO 40557,Bucharest, Romania]
Tarrant, N. J. [School of Physics and Astronomy, University of Birmingham, Birmingham B15 2TT, UK]
Weiss, A. [Max-Planck-Institut für Astrophysik, Karl-Schwarzschild-Str. 1, 85748 Garching, Germany]
1-Apr-2010
Astrophysical Journal
713
L176-L181
Yes (verified by ORBi)
International
0004-637X
1538-4357
[en] stars: oscillations
[en] We have measured solar-like oscillations in red giants using time-series photometry from the first 34 days of science operations of the Kepler Mission. The light curves, obtained with 30 minute sampling, reveal clear oscillations in a large sample of G and K giants, extending in luminosity from the red clump down to the bottom of the giant branch. We confirm a strong correlation between the large separation of the oscillations (Πν) and the frequency of maximum power (ν[SUB]max[/SUB]). We focus on a sample of 50 low-luminosity stars (ν[SUB]max[/SUB] > 100 μHz, L <~ 30 L [SUB]sun[/SUB]) having high signal-to-noise ratios and showing the unambiguous signature of solar-like oscillations. These are H-shell-burning stars, whose oscillations should be valuable for testing models of stellar evolution and for constraining the star formation rate in the local disk. We use a new technique to compare stars on a single échelle diagram by scaling their frequencies and find well-defined ridges corresponding to radial and non-radial oscillations, including clear evidence for modes with angular degree l = 3. Measuring the small separation between l = 0 and l = 2 allows us to plot the so-called C-D diagram of δν[SUB]02[/SUB] versus Πν. The small separation δν[SUB]01[/SUB] of l = 1 from the midpoint of adjacent l = 0 modes is negative, contrary to the Sun and solar-type stars. The ridge for l = 1 is notably broadened, which we attribute to mixed modes, confirming theoretical predictions for low-luminosity giants. Overall, the results demonstrate the tremendous potential of Kepler data for asteroseismology of red giants.
http://hdl.handle.net/2268/75538
10.1088/2041-8205/713/2/L176
http://adsabs.harvard.edu/abs/2010ApJ...713L.176B
http://de.arxiv.org/abs/1001.0229

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