The hydrodynamic stability of ionization-shock fronts - Linear theory

Details The hydrodynamic stability of ionization-shock fronts - Linear theory The hydrodynamic stability of ionization-shock fronts - Linear theory

Oct 1979

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1979apj...233..280g&link_type=abstract

Astrophysical Journal, Part 1, vol. 233, Oct. 1, 1979, p. 280-293.

Computer Science

Numerical Analysis

43

Gas Ionization, Hydrodynamics, Magnetohydrodynamic Stability, Nebulae, Perturbation Theory, Shock Fronts, Differential Equations, H Ii Regions, Hydrodynamic Equations, Linear Systems, Mathematical Models, Numerical Analysis, Time Dependence

Scientific paper

The hydrodynamic stability of an ionization-shock (IS) front is examined in the case where all regions are considered isothermal and self-gravity is neglected. It is shown that an IS front is subject to a hydrodynamic instability that does not involve self-gravity. This instability is expected to be important in all H II regions that have grown to their Stroemgren limit and started to expand dynamically. A mechanism is proposed by which the interaction of an IS front with a positive density fluctuation can lead to the formation of an elongated 'elephant trunk'.

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