The interferometric diameter and internal structure of Sirius A

  title={The interferometric diameter and internal structure of Sirius A},
  author={Pierre Kervella and F. Th{\'e}venin and P. Morel and Pascal J. Bord{\'e} and Emmanuel di Folco},
  journal={arXiv: Astrophysics},
The interferometric observations of dwarf stars in the solar neighbourhood, combined with Hipparcos parallaxes provide very precise values of their linear diameters. In this paper, we report the direct measurement of the angular diameter of the bright star Sirius A with the VINCI/VLTI instrument. We obtain a uniform disk angular diameter of UD = 5.936 +/- 0.016 mas in the K band and a limb darkened value of LD = 6.039 +/- 0.019 mas. In combination with the Hipparcos parallax of 379.22 +/- 1.58… 

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