Instability of a comet ionopause: Consequences of collisions and compressibility

@article{Ershkovich1986InstabilityOA,
  title={Instability of a comet ionopause: Consequences of collisions and compressibility},
  author={A. Ershkovich and D. Prialnik and A. Eviatar},
  journal={Journal of Geophysical Research},
  year={1986},
  volume={91},
  pages={8782-8788}
}
We have analyzed the stability of a contact surface located at the ram pressure balance position in a comet coma ionosphere in the presence of collisions between ions and neutrals and finite compressibility. We find that if the surface is taken to be a tangential discontinuity which excludes the interplanetary magnetic field from the ionosphere, this ionopause will be violently unstable to MHD modes. We therefore expect the large-scale magnetic field to permeate the entire coma, even during… Expand
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