High spectral resolution imaging of the dynamical atmosphere of the red supergiant Antares in the CO first overtone lines with VLTI/AMBER

  title={High spectral resolution imaging of the dynamical atmosphere of the red supergiant Antares in the CO first overtone lines with VLTI/AMBER},
  author={Keiichi Ohnaka and K. H. Hofmann and Dieter Schertl and G Weigelt and Carlo Baffa and Alain E. Chelli and Romain G. Petrov and Sylvie Robbe-Dubois},
  journal={Astronomy and Astrophysics},
Aims. We present aperture-synthesis imaging of the red supergiant Antares (α Sco) in the CO first overtone lines. Our goal is to probe the structure and dynamics of the outer atmosphere. Methods. Antares was observed between 2.28� m and 2.31� m with VLTI/AMBER with spectral resolutions of up to 12000 and angular resolutions as high as 7.2 mas at two epochs with a time interval of one year. Results. The reconstructed images in individual CO lines reveal that the star appears differently in the… Expand
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