Nonlinear Density Waves in Self-Gravitating Gas Sheets
Abstract
A three-step analytical model is employed to study the dynamical evolution of spiral density waves in a thin self-gravitating rotating gas sheet. The sheet subjected to spiral perturbations is analyzed in terms of linear stability, and the wave-amplitude evolution is studied. The perturbed surface density is subjected to a nondeterministic oscillation that can be used to describe the recurrent spiral instabilities of stellar disks.
- Publication:
-
Dynamics and Interactions of Galaxies
- Pub Date:
- 1990
- Bibcode:
- 1990dig..book..350F
- Keywords:
-
- Density Wave Model;
- Gas Dynamics;
- Gravitational Effects;
- Nonlinear Equations;
- Stellar Structure;
- Computational Astrophysics;
- Rotating Fluids;
- Astrophysics