Origin of the Cartwheel Galaxy: Disk Instability?

  title={Origin of the Cartwheel Galaxy: Disk Instability?},
  author={Evgeny Griv},
  journal={Astrophysics and Space Science},
  • E. Griv
  • Published 1 October 2005
  • Physics
  • Astrophysics and Space Science
The linear theory and N-body simulations are used to present a new, alternative model of the galaxy A0035-324 (the “Cartwheel”), which is the most striking example of the relatively small class of ring galaxies. The model is based on the gravitational Jeans-type instability of both axisymmetric (radial) and nonaxisymmetric (spiral) small-amplitude gravity perturbations (e.g., those produced by spontaneous disturbances) of a dynamically cold subsystem (identified as the gaseous component) of an… 

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