Characterisation of red-giant stars in the public Kepler data
  The first public release of long-cadence stellar photometric data collected by the NASA Kepler mission has now been made available. In this paper we characterise the red-giant (G-K) stars in this large sample in terms of their solar-like oscillations. We use published methods and well-known scaling relations in the analysis. Just over 70% of the red giants in the sample show detectable solar-like oscillations, and from these oscillations we are able to estimate the fundamental properties of the stars. This asteroseismic analysis reveals different populations: low-luminosity H-shell burning red-giant branch stars, cool high-luminosity red giants on the red-giant branch and He-core burning clump and secondary-clump giants. 
S. Hekker, R.L. Gilliland, Y. Elsworth, W.J. Chaplin, J. De Ridder, D.   Stello, T. Kallinger, K.A. Ibrahim, T.C. Klaus, J. Li
astro-ph.SR