The inhomogeneous submillimeter atmosphere of Betelgeuse

@article{OGorman2017TheIS,
  title={The inhomogeneous submillimeter atmosphere of Betelgeuse},
  author={E. O’Gorman and P. Kervella and G. Harper and A. Richards and L. Decin and M. Montarg{\`e}s and I. McDonald},
  journal={Astronomy and Astrophysics},
  year={2017},
  volume={602}
}
The mechanisms responsible for heating the extended atmospheres of early-M spectral-type supergiants are poorly understood. So too is the subsequent role these mechanisms play in driving the large mass-loss rates of these stars. Here we present ALMA long (i.e., ~16 km) baseline 338 GHz (0.89 mm) continuum observations of the free-free emission in the extended atmosphere of the M2 spectral-type supergiant Betelgeuse. The spatial resolution of 14 mas exquisitely resolves the atmosphere, revealing… Expand
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