Ionization cone

Ionization cones are cones of material extending out from spiral galaxies. They are visible because of their emissions which are believed to be from re-emission of photons produced by nuclear activity within the galaxy itself.[1][2]

There is not yet a scientific consensus on the mechanics of such cones.

References
  1. Paper by Wilson on the properties of such cones
  2. Paper proposing a model for Ionization cone operation


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