J, H, K spectro-interferometry of the Mira variable S Orionis

  title={J, H, K spectro-interferometry of the Mira variable S Orionis},
  author={Markus Wittkowski and David A. Boboltz and Thomas Driebe and J.-B. Le Bouquin and F. Millour and Keiichi Ohnaka and Miklas Scholz},
  journal={Astronomy and Astrophysics},
Aims. We present J, H, K spectrally dispersed interferometry with a spectral resolution of 35 for the Mira variable S Orionis. We aim at measuring the diameter variation as a function of wavelength that is expected due to molecular layers lying above the continuumforming photosphere. Our final goal is a better understanding of the pulsating atmosphere and its role in the mass-loss process. Methods. Visibility data of S Ori were obtained at phase 0.78 with the VLTI/AMBER instrument using the… 

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