Dynamical models of radiative shocks. II - Unsteady shocks

Details Dynamical models of radiative shocks. II - Unsteady shocks Dynamical models of radiative shocks. II - Unsteady shocks

May 1987

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1987mnras.226...67i&link_type=abstract

Monthly Notices of the Royal Astronomical Society (ISSN 0035-8711), vol. 226, May 1, 1987, p. 67-93.

Statistics

Computation

96

Dynamic Models, Interstellar Space, Radiative Transfer, Shock Wave Propagation, Computational Astrophysics, Interstellar Gas, Spectrum Analysis, Unsteady State

Scientific paper

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.

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