Multiwavelength observations of NaSt1 (WR 122): equatorial mass loss and X-rays from an interacting Wolf–Rayet binary

@article{Mauerhan2015MultiwavelengthOO,
  title={Multiwavelength observations of NaSt1 (WR 122): equatorial mass loss and X-rays from an interacting Wolf–Rayet binary},
  author={Jon C. Mauerhan and Nathan Smith and Schuyler D. Van Dyk and Katie M. Morzinski and Laird M. Close and Philip M. Hinz and Jared R. Males and Timothy J. Rodigas},
  journal={Monthly Notices of the Royal Astronomical Society},
  year={2015},
  volume={450},
  pages={2551-2563}
}
NaSt1 (aka Wolf–Rayet 122) is a peculiar emission-line star embedded in an extended nebula of [N ii] emission with a compact dusty core. The object was previously characterized as a Wolf–Rayet (WR) star cloaked in an opaque nebula of CNO-processed material, perhaps analogous to η Car and its Homunculus nebula, albeit with a hotter central source. To discern the morphology of the [N ii] nebula we performed narrow-band imaging using the Hubble Space Telescope and Wide-field Camera 3. The images… 

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