The radii and limb darkenings of α Centauri A and B . Interferometric measurements with VLTI/PIONIER

@article{Kervella2016TheRA,
  title={The radii and limb darkenings of $\alpha$ Centauri A and B . Interferometric measurements with VLTI/PIONIER},
  author={Pierre Kervella and Lionel Bigot and Alexandre Gallenne and Fr'ed'eric Th'evenin},
  journal={Astronomy and Astrophysics},
  year={2016},
  volume={597}
}
The photospheric radius is one of the fundamental parameters governing the radiative equilibrium of a star. We report new observations of the nearest solar-type stars α  Centauri A (G2V) and B (K1V) with the VLTI/PIONIER optical interferometer. The combination of four configurations of the VLTI enable us to measure simultaneously the limb darkened angular diameter θ LD and the limb darkening parameters of the two solar-type stars in the near-infrared H band ( λ = 1.65 μ m). We obtain… 

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