Parametric instability in a free-evolving warped protoplanetary disc

@article{Deng2020ParametricII,
  title={Parametric instability in a free-evolving warped protoplanetary disc},
  author={Hongping Deng and Gordon I. Ogilvie and Lucio Mayer},
  journal={Monthly Notices of the Royal Astronomical Society},
  year={2020},
  volume={500},
  pages={4248-4256}
}
Warped accretion discs of low viscosity are prone to hydrodynamic instability due to parametric resonance of inertial waves as confirmed by local simulations. Global simulations of warped discs, using either smoothed particle hydrodynamics (SPH) or grid-based codes, are ubiquitous but no such instability has been seen. Here we utilize a hybrid Godunov-type Lagrangian method to study parametric instability in global simulations of warped Keplerian discs at unprecedentedly high resolution (up to… 
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Lecture notes on accretion disk physics
These notes introduce and review some of the physical principles underlying the theory of astrophysical accretion, emphasizing the central roles of angular momentum transport, angular momentum loss,…
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On the Dynamics of Low-viscosity Warped Disks around Black Holes
Accretion disks around black holes can become warped by Lense–Thirring precession. When the disk viscosity is sufficiently small, such that the warp propagates as a wave, then steady-state solutions…

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