An Asteroseismic Membership Study of the Red Giants in Three Open Clusters Observed by Kepler: NGC 6791, NGC 6819, and NGC 6811
- Author(s)
- Dennis Stello, Søren Meibom, Ronald L. Gilliland, Frank Grundahl, Saskia Hekker, Benoît Mosser, Thomas Kallinger, Savita Mathur, Rafael A. García, Daniel Huber, Sarbani Basu, Timothy R. Bedding, Karsten Brogaard, William J. Chaplin, Yvonne P. Elsworth, Joanna Molenda-Żakowicz, Robert Szabó, Martin Still, Jon M. Jenkins, Jørgen Christensen-Dalsgaard, Hans Kjeldsen, Aldo M. Serenelli, Bill Wohler
- Abstract
Studying star clusters offers significant advances in stellar astrophysics due to the combined power of having many stars with essentially the same distance, age, and initial composition. This makes clusters excellent test benches for verification of stellar evolution theory. To fully exploit this potential, it is vital that the star sample is uncontaminated by stars that are not members of the cluster.Techniques for determining cluster membership therefore play a key rolein the investigation of clusters. We present results on three clustersin the Kepler field of view based on a newly established technique thatuses asteroseismology to identify fore- or background stars in the field, which demonstrates advantages over classical methods such as kinematic and photometry measurements. Four previously identified seismic non-members in NGC 6819 are confirmed in this study, and three additional non-members are found—two in NGC 6819 and one in NGC6791. We further highlight which stars are, or might be, affected by blending, which needs to be taken into account when analyzing these Kepler data.
- Organisation(s)
- Department of Astrophysics
- External organisation(s)
- The University of Sydney, Harvard-Smithsonian Center for Astrophysics, Space Telescope Science Institute, Aarhus University, University of Birmingham, Université de recherche Paris Sciences et Lettres, University of British Columbia (UBC), National Center for Atmospheric Research (NCAR), Université Paris VII - Paris-Diderot, Yale University, University of Victoria, University of Wrocław, Hungarian Academy of Sciences, National Aeronautics & Space Administration (NASA), Spanish National Research Council (CSIC)
- Journal
- The Astrophysical Journal
- Volume
- 739
- Pages
- 13
- ISSN
- 0004-637X
- DOI
- https://doi.org/10.1088/0004-637X/739/1/13
- Publication date
- 09-2011
- Peer reviewed
- Yes
- Austrian Fields of Science 2012
- 103004 Astrophysics
- Keywords
- Portal url
- https://ucrisportal.univie.ac.at/en/publications/0ab2cc37-bcbe-425c-8f4c-a2b146c23d36