SEARCHING FOR COOL DUST IN THE MID-TO-FAR INFRARED: THE MASS-LOSS HISTORIES OF THE HYPERGIANTS μ Cep, VY CMa, IRC+10420, AND ρ Cas

@article{Shenoy2015SEARCHINGFC,
  title={SEARCHING FOR COOL DUST IN THE MID-TO-FAR INFRARED: THE MASS-LOSS HISTORIES OF THE HYPERGIANTS $\mu$ Cep, VY CMa, IRC+10420, AND $\rho$ Cas},
  author={Dinesh P. Shenoy and Roberta M. Humphreys and Terry J. Jones and Massimo Marengo and Robert D. Gehrz and L. Andrew Helton and William F. Hoffmann and Andrew J. I. Skemer and Philip M. Hinz},
  journal={The Astronomical Journal},
  year={2015},
  volume={151},
  pages={51}
}
We present mid- and far- IR imaging of four famous hypergiant stars: the red supergiants $\mu$ Cep and VY CMa, and the warm hypergiants IRC +10420 and $\rho$ Cas. Our 11 to 37 $\mu$m SOFIA/FORCAST imaging probes cool dust not detected in visual and near-IR imaging studies. Adaptive optics (AO) 8 - 12 $\mu$m imaging of $\mu$ Cep and IRC +10420 with MMT/MIRAC reveals extended envelopes that are the likely sources of these stars' strong silicate emission features. We find $\mu$ Cep's mass-loss… 
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