Spatially resolving the outer atmosphere of the M giant BK Virginis in the CO first overtone lines with VLTI/AMBER

@article{Ohnaka2012SpatiallyRT,
  title={Spatially resolving the outer atmosphere of the M giant BK Virginis in the CO first overtone lines with VLTI/AMBER},
  author={Keiichi Ohnaka and K. H. Hofmann and Dieter Schertl and Gerd Weigelt and Fabien Malbet and F. Massi and Anthony Meilland and P. Stee},
  journal={Astronomy and Astrophysics},
  year={2012},
  volume={537},
  pages={53}
}
Context. The mass-loss mechanism in normal K–M giant stars with small variability amplitudes is not yet understood, although the majority among red giant stars are precisely of this type. Aims. We present high-spatial and high-spectral resolution observations of the M7 giant BK Vir with AMBER at the Very Large Telescope Interferometer (VLTI). Our aim is to probe the physical properties of the outer atmosphere by spatially resolving the star in the individual CO first overtone lines. Methods. BK… 

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