Gauge conditions for long-term numerical black hole evolutions without excision

@article{Alcubierre2003GaugeCF,
  title={Gauge conditions for long-term numerical black hole evolutions without excision},
  author={Miguel Alcubierre and Bernd Bruegmann and Peter Diener and Michael Koppitz and Denis Pollney and Edward Seidel and Ryoji Takahashi},
  journal={Physical Review D},
  year={2003},
  volume={67},
  pages={084023}
}
We extend previous work on 3D black hole excision to the case of distorted black holes, with a variety of dynamic gauge conditions that are able to respond naturally to the spacetime dynamics. We show that the combination of excision and gauge conditions we use is able to drive highly distorted, rotating black holes to an almost static state at late times, with well behaved metric functions, without the need for any special initial conditions or analytically prescribed gauge functions. Further… 
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