The radii of the nearby K5V and K7V stars 61 Cygni A & B. CHARA/FLUOR interferometry and CESAM2k modeling

  title={The radii of the nearby K5V and K7V stars 61 Cygni A \& B. CHARA/FLUOR interferometry and CESAM2k modeling},
  author={Pierre Kervella and Antoine M'erand and Bernard Pichon and Fr'ed'eric Th'evenin and Ulrike Heiter and Lionel Bigot and Theo A. ten Brummelaar and Harold A. Mcalister and Stephen T. Ridgway and Nils H. Turner and Judit Sturmann and Laszlo Sturmann and P. J. Goldfinger and Christopher D. Farrington},
  journal={Astronomy and Astrophysics},
Context: The main sequence binary star 61 Cyg (K5V+K7V) is our nearest stellar neighbour in the northern hemisphere. This proximity makes it a particularly well suited system for very high accuracy interferometric radius measurements. Aims: Our goal is to constrain the poorly known evolutionary status and age of this bright binary star. Methods: We obtained high accuracy interferometric observations in the infrared K' band, using the CHARA/FLUOR instrument. We then computed evolutionary models… 

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