High-Resolution Infrared Imaging and Spectroscopy of the Pistol Nebula: Evidence for Ejection

@article{Figer1999HighResolutionII,
  title={High-Resolution Infrared Imaging and Spectroscopy of the Pistol Nebula: Evidence for Ejection},
  author={Donald F. Figer and Mark R. Morris and Thomas R. Geballe and Robert Michael Rich and Eugene Serabyn and Ian S. McLean and R. C. Puetter and Amos Yahil},
  journal={The Astrophysical Journal},
  year={1999},
  volume={525},
  pages={759 - 771}
}
We present new infrared images, obtained with the Hubble Space Telescope (HST) Near-Infrared Camera and Multiobject Spectrometer (NICMOS), and Brα (4.05 μm) spectroscopy, obtained using CGS4 on UKIRT, of the Pistol Star and its associated nebula. We find strong evidence to support the hypothesis that the Pistol Nebula was ejected from the Pistol Star. The Paα (1.87 μm) NICMOS image shows that the nebula completely surrounds the Pistol Star, although the line intensity is much stronger on its… 
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