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Non-radial oscillation modes with long lifetimes in giant stars

Author

Listed:
  • Joris De Ridder

    (Instituut voor Sterrenkunde, K. U. Leuven, Celestijnenlaan 200D, B-3001 Leuven, Belgium)

  • Caroline Barban

    (LESIA, UMR8109, Université Pierre et Marie Curie, Université Denis Diderot, Observatoire de Paris, 92195 Meudon, France)

  • Frédéric Baudin

    (Institut d’Astrophysique Spatiale, UMR 8617 CNRS-Université Paris XI, Campus d’Orsay)

  • Fabien Carrier

    (Instituut voor Sterrenkunde, K. U. Leuven, Celestijnenlaan 200D, B-3001 Leuven, Belgium)

  • Artie P. Hatzes

    (Thüringer Landessternwarte)

  • Saskia Hekker

    (Instituut voor Sterrenkunde, K. U. Leuven, Celestijnenlaan 200D, B-3001 Leuven, Belgium
    Royal Observatory of Belgium, Ringlaan 3, 1180 Brussels, Belgium)

  • Thomas Kallinger

    (Institute for Astronomy, University of Vienna, Türkenschanzstrasse 17, A-1180 Vienna, Austria)

  • Werner W. Weiss

    (Institute for Astronomy, University of Vienna, Türkenschanzstrasse 17, A-1180 Vienna, Austria)

  • Annie Baglin

    (LESIA, UMR8109, Université Pierre et Marie Curie, Université Denis Diderot, Observatoire de Paris, 92195 Meudon, France)

  • Michel Auvergne

    (LESIA, UMR8109, Université Pierre et Marie Curie, Université Denis Diderot, Observatoire de Paris, 92195 Meudon, France)

  • Réza Samadi

    (LESIA, UMR8109, Université Pierre et Marie Curie, Université Denis Diderot, Observatoire de Paris, 92195 Meudon, France)

  • Pierre Barge

    (Laboratoire d’Astrophysique de Marseille, OAMP, Université Aix-Marseille & CNRS, 38 rue Frédéric Joliot Curie, 13388 Marseille 13, France)

  • Magali Deleuil

    (Laboratoire d’Astrophysique de Marseille, OAMP, Université Aix-Marseille & CNRS, 38 rue Frédéric Joliot Curie, 13388 Marseille 13, France)

Abstract

Taking the pulse of red giants When main-sequence stars like the Sun near the end of their life, they expand to become oscillating red giants. Such evolved stars could in principle provide stringent tests of stellar theory via analysis of radial and non-radial stellar oscillations. Until now it has been unclear whether non-radial modes are observable at all in red giants. De Ridder et al. now report the presence of both radial and non-radial oscillations in over 300 giant stars. For some red giants, mode lifetimes are of the order of a month. Current stellar evolution theory cannot account for these observations.

Suggested Citation

  • Joris De Ridder & Caroline Barban & Frédéric Baudin & Fabien Carrier & Artie P. Hatzes & Saskia Hekker & Thomas Kallinger & Werner W. Weiss & Annie Baglin & Michel Auvergne & Réza Samadi & Pierre Barg, 2009. "Non-radial oscillation modes with long lifetimes in giant stars," Nature, Nature, vol. 459(7245), pages 398-400, May.
    • Handle: RePEc:nat:nature:v:459:y:2009:i:7245:d:10.1038_nature08022
    DOI: 10.1038/nature08022
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