Precise radial velocities of giant stars

@article{Heeren2018PreciseRV,
  title={Precise radial velocities of giant stars},
  author={Paul Heeren and Sabine Reffert and Trifon Trifonov and Ka Ho Wong and Man Hoi Lee and Jorge Lillo-Box and Andreas Quirrenbach and Torben Arentoft and Simon H. Albrecht and Frank Grundahl and Mads Fredslund Andersen and Victoria Antoci and Pere L. Pall{\'e}},
  journal={Astronomy \& Astrophysics},
  year={2018}
}
Context. Using the Hamilton Échelle Spectrograph at Lick Observatory, we have obtained precise radial velocities (RVs) of a sample of 373 G- and K-giant stars over more than 12 yr, leading to the discovery of several single and multiple planetary systems. The RVs of the long-period (~53 yr) spectroscopic binary ε Cyg (HIP 102488) are found to exhibit additional regular variations with a much shorter period (~291 days). Aims. We intend to improve the orbital solution of the ε Cyg system and… 

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