Stability of radiative shocks with time-dependent cooling

Details Stability of radiative shocks with time-dependent cooling Stability of radiative shocks with time-dependent cooling

Jun 1988

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1988apj...329..927g&link_type=abstract

Astrophysical Journal, Part 1 (ISSN 0004-637X), vol. 329, June 15, 1988, p. 927-942.

Astronomy and Astrophysics

Astrophysics

104

Gas Dynamics, Interstellar Gas, Radiant Cooling, Shock Fronts, Shock Wave Propagation, Abundance, Bremsstrahlung, Flow Stability, Gas Ionization, Temperature Profiles

Scientific paper

Radiative shocks are known to be subject to overstable oscillations in which the position of the shock front relative to the driving "piston" varies as a function of time. Various linear and nonlinear calculations have examined the properties of the instability for power-law cooling functions. However, the cooling functions appropriate to interstellar shock waves are history dependent: simple power-law approximations are not valid. In this work, a full evolutionary calculation of the ion abundances and radiative cooling is incorporated into an accurate one-dimensional gasdynamics calculation. It is found that radiative shocks are unstable for velocities in excess of ≡140 km s-1.

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