Dynamical models of radiative shocks. II - Unsteady shocks
Abstract
This paper describes the results of numerical calculations of the flow behind plane-parallel radiative shocks driven by a constant pressure piston. The authors have included both time-dependent dynamics and a detailed calculation of the ionization state and the radiation field. They find that shocks with speeds greater than or equal to 150 km s-1 are unstable in the sense that a small upstream perturbation triggers large and persistent variations in the shock velocity. This has a dramatic effect on the emission-line ratios and suggests that steady models of shock excited emission are of little use in such cases.
- Publication:
-
Monthly Notices of the Royal Astronomical Society
- Pub Date:
- May 1987
- DOI:
- 10.1093/mnras/226.1.67
- Bibcode:
- 1987MNRAS.226...67I
- Keywords:
-
- Dynamic Models;
- Interstellar Space;
- Radiative Transfer;
- Shock Wave Propagation;
- Computational Astrophysics;
- Interstellar Gas;
- Spectrum Analysis;
- Unsteady State;
- Astrophysics