Asteroseismic inferences on red giants in open clusters NGC 6791, NGC 6819, and NGC 6811 using Kepler
Hekker, S × Basu, S Stello, D Kallinger, Thomas Grundahl, F Mathur, S Garcia, R. A Mosser, B Huber, D Bedding, T. R Szabo, R De Ridder, Joris Chaplin, W. J Elsworth, Y Hale, S. J Christensen-Dalsgaard, J Gilliland, R. L Still, M McCauliff, S Quintana, E. V #
Astronomy & Astrophysics vol:530 pages:-
Context. Four open clusters are present in the Kepler field of view and timeseries of nearly a year in length are now available. These timeseries allow us to derive asteroseismic global oscillation parameters of red-giant stars in the three open clusters NGC 6791, NGC 6819 and NGC 6811. From these parameters and effective temperatures, we derive masses, radii and luminosities for the clusters as well as field red giants.