The Density Spike in Cosmic-Ray-Modified Shocks: Formation, Evolution, and Instability

  • Byung-Il Jun
  • Published 1996


We examine the formation and evolution of the density enhancement (density spike) that appears downstream of strong, cosmic-ray-modified shocks. This feature results from temporary overcompression of the flow by the combined cosmic-ray shock precursor/gas subshock. Formation of the density spike is expected whenever shock modification by cosmic-ray pressure… (More)