The instability of the galactic shock wave in shear flow
Abstract
We present the results of the linear analysis of stability of the galactic shock wave in shear flow. The shock wave is shown to be unstable if the shock front is located at the rear, relative to the flow, side of the spiral arm and that the effects of the shear flow and the Coriolis force promote instability and increase its increment. We find that the primary reason of instability is spontaneous emission of unstable sound waves by the front in the nonuniform flow whereas the effects of resonant amplification of waves in the shear flow play the secondary role.
- Publication:
-
Dynamical Studies of Star Clusters and Galaxies
- Pub Date:
- 1998
- Bibcode:
- 1998dssc.confE...3K