Kepler binary stars in NGC 6791 open cluster: KIC 2437060, KIC 2437149, and KIC 2438490

The study of detached eclipsing binaries in open clusters can provide powerful tests of theoretical stellar evolutionary models. These models must simultaneously fit the masses, radii, and radiative properties of the eclipsing stars with essentially the same distance, age, and initial composition. In this way, clusters are ideal test benches for verification of the stellar evolution theory. To fully exploit this potential, we present a detailed analysis of three spectroscopic binaries that are members of NGC 6791. Measurements of the radial velocities were combined with Kepler photometry, to provide a full set of orbital and physical parameters. We applied a standard analysis to disentangle the spectra of each binary system and to determine the temperatures and metallicities for each component in binaries. High-precision analysis affords us the opportunity to define the evolutionary status of the components. We also derived the distances to the systems. Finally, we report on the detection of solar-like oscillation signals in a member in data from the Kepler mission.