THE DISCOVERY OF INFRARED RINGS IN THE PLANETARY NEBULA NGC 1514 DURING THE WISE ALL-SKY SURVEY

@article{Ressler2010THEDO,
  title={THE DISCOVERY OF INFRARED RINGS IN THE PLANETARY NEBULA NGC 1514 DURING THE WISE ALL-SKY SURVEY},
  author={Michael E. Ressler and Martin G. Cohen and Stefanie Wachter and Donald Wayne Hoard and Amy K. Mainzer and Edward L. Wright},
  journal={The Astronomical Journal},
  year={2010},
  volume={140},
  pages={1882 - 1890}
}
We report the discovery of a pair of infrared, axisymmetric rings in the planetary nebula NGC 1514 during the course of the WISE all-sky mid-infrared survey. Similar structures are seen at visible wavelengths in objects such as the “Engraved Hourglass Nebula” (MyCn 18) and the “Southern Crab Nebula” (Hen 2-104). However, in NGC 1514 we see only a single pair of rings and they are easily observed only in the mid-infrared. These rings are roughly 0.2 pc in diameter, are separated by 0.05 pc, and… 
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