Looking Deep into the Cat's Eye: Structure and Rotation in the Fast Wind of the PN Central Star of NGC?6543

@article{Prinja2012LookingDI,
  title={Looking Deep into the Cat's Eye: Structure and Rotation in the Fast Wind of the PN Central Star of NGC?6543},
  author={Raman K. Prinja and D. L. Massa and Michele Cantiello},
  journal={The Astrophysical Journal},
  year={2012},
  volume={759}
}
We present HST/STIS time-series spectroscopy of the central star of the 'Cat's Eye' planetary nebula NGC 6543. Intensive monitoring of the UV lines over a 5.8 hr period reveals well-defined details of large-scale structure in the fast wind, which are exploited to provide new constraints on the rotation rate of the central star. We derive characteristics of the line profile variability that support a physical origin due to corotating interaction regions (CIRs) that are rooted at the stellar… 

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