IMAGING THE COOL HYPERGIANT NML CYGNI'S DUSTY CIRCUMSTELLAR ENVELOPE WITH ADAPTIVE OPTICS

@article{Schuster2009IMAGINGTC,
  title={IMAGING THE COOL HYPERGIANT NML CYGNI'S DUSTY CIRCUMSTELLAR ENVELOPE WITH ADAPTIVE OPTICS},
  author={M. Schuster and M. Marengo and J. Hora and G. Fazio and R. Humphreys and R. Gehrz and P. Hinz and M. Kenworthy and W. Hoffmann},
  journal={The Astrophysical Journal},
  year={2009},
  volume={699},
  pages={1423-1432}
}
We present subarcsecond angular resolution, high-Strehl ratio mid-IR adaptive optics images of the powerful OH/IR source and cool hypergiant NML Cyg at 8.8, 9.8, and 11.7 ?m. These images reveal once more the complexity in the dusty envelope surrounding this star. We spatially resolve the physical structures (radius ~ 014, ~240 AU adopting a distance of 1.74 kpc) responsible for NML Cyg's deep 10 ?m silicate dust absorption feature. We also detect an asymmetric excess, at separations of ~03-05… Expand

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