Detection of solar-like oscillations from kepler photometry of the open cluster NGC 6819

Dennis Stello, Sarbani Basu, Hans Bruntt, Benot Mosser, Ian R. Stevens, Timothy M. Brown, Jørgen Christensen-Dalsgaard, Ronald L. Gilliland, Hans Kjeldsen, Torben Arentoft, Jérme Ballot, Caroline Barban, Timothy R. Bedding, William J. Chaplin, Yvonne P. Elsworth, Rafael A. García, Marie Jo Goupil, Saskia Hekker, Daniel Huber, Savita MathurSøren Meibom, Vinothini Sangaralingam, Charles S. Baldner, Kevin Belkacem, Katia Biazzo, Karsten Brogaard, Juan Carlos Suárez, Francesca D'Antona, Pierre Demarque, Lisa Esch, Ning Gai, Frank Grundahl, Yveline Lebreton, Biwei Jiang, Nada Jevtic, Christoffer Karoff, Andrea Miglio, Joanna Molenda-Akowicz, Josefina Montalbn, Arlette Noels, Teodoro Roca Cortés, Ian W. Roxburgh, Aldo M. Serenelli, Victor Silva Aguirre, Christiaan Sterken, Peter Stine, Robert Szabó, Achim Weiss, William J. Borucki, David Koch, Jon M. Jenkins

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Abstract

Asteroseismology of stars in clusters has been a long-sought goal because the assumption of a common age, distance, and initial chemical composition allows strong tests of the theory of stellar evolution. We report results from the first 34days of science data from the Kepler Mission for the open cluster NGC 6819 - one of the four clusters in the field of view. We obtain the first clear detections of solar-like oscillations in the cluster red giants and are able to measure the large frequency separation, Δν, and the frequency of maximum oscillation power, νmax. We find that the asteroseismic parameters allow us to test cluster membership of the stars, and even with the limited seismic data in hand, we can already identify four possible non-members despite their having a better than 80% membership probability from radial velocity measurements. We are also able to determine the oscillation amplitudes for stars that span about 2 orders of magnitude in luminosity and find good agreement with the prediction that oscillation amplitudes scale as the luminosity to the power of 0.7. These early results demonstrate the unique potential of asteroseismology of the stellar clusters observed by Kepler.

Original languageEnglish (US)
Pages (from-to)L182-L186
JournalAstrophysical Journal Letters
Volume713
Issue number2 PART 2
DOIs
StatePublished - Jan 1 2010

All Science Journal Classification (ASJC) codes

  • Astronomy and Astrophysics
  • Space and Planetary Science

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    Stello, D., Basu, S., Bruntt, H., Mosser, B., Stevens, I. R., Brown, T. M., Christensen-Dalsgaard, J., Gilliland, R. L., Kjeldsen, H., Arentoft, T., Ballot, J., Barban, C., Bedding, T. R., Chaplin, W. J., Elsworth, Y. P., García, R. A., Goupil, M. J., Hekker, S., Huber, D., ... Jenkins, J. M. (2010). Detection of solar-like oscillations from kepler photometry of the open cluster NGC 6819. Astrophysical Journal Letters, 713(2 PART 2), L182-L186. https://doi.org/10.1088/2041-8205/713/2/L182