VLTI/AMBER spectro-interferometry of the late-type supergiants V766 Cen (=HR 5171 A), σ Oph, BM Sco, and HD 206859

  title={VLTI/AMBER spectro-interferometry of the late-type supergiants V766 Cen (=HR 5171 A), $\sigma$ Oph, BM Sco, and HD 206859},
  author={M. Wittkowski and B. Arroyo-Torres and J. Marcaide and F. J. Abell{\'a}n and A. Chiavassa and J. Guirado},
  journal={Astronomy and Astrophysics},
Aims. We add four warmer late-type supergiants to our previous spectro-interferometric studies of red giants and supergiants. Methods. We measure the near-continuum angular diameter, derive fundamental parameters, discuss the evolutionary stage, and study extended atmospheric atomic and molecular layers. Results. V766 Cen (=HR 5171 A) is found to be a high-luminosity (log  L / L ⊙  = 5.8 ± 0.4) source of effective temperature 4290 ± 760 K and radius 1490 ± 540  R ⊙ , located in the Hertzsprung… Expand
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