• Corpus ID: 118653275

The many faces of Betelgeuse

  title={The many faces of Betelgeuse},
  author={Vikram Ravi and Edward H. Wishnow and Sean A. Lockwood and Charles H. Townes},
  journal={arXiv: Solar and Stellar Astrophysics},
The dynamics of the surface and inner atmosphere of the red supergiant star Betelgeuse are the subject of numerous high angular resolution and spectroscopic studies. Here, we present three-telescope interferometric data obtained at 11.15 microns wavelength with the Berkeley Infrared Spatial Interferometer (ISI), that probe the stellar surface continuum. We find striking variability in the size, effective temperature, and degree of asymmetry of the star over the years 2006-2009. These results… 

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