Nonlinear hydrodynamics of acoustic instabilities in diffuse clouds

Details Nonlinear hydrodynamics of acoustic instabilities in diffuse clouds Nonlinear hydrodynamics of acoustic instabilities in diffuse clouds

Sep 1980

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1980apj...240..488m&link_type=abstract

Astrophysical Journal, Part 1, vol. 240, Sept. 1, 1980, p. 488-498

Astronomy and Astrophysics

Astrophysics

2

Acoustic Instability, Hydrodynamics, Hydrogen Clouds, Interstellar Matter, Nebulae, Astronomical Models, Difference Equations, Nonlinear Systems, Numerical Integration

Scientific paper

Using a linearized analysis, Flannery and Press (1979) demonstrated the existence of an ionization-coupled acoustic instability in the thermally stable phase of diffuse cold clouds in the ISM (interstellar medium). In this paper a series of one-dimensional, time-dependent, hydrodynamic calculations of the nonlinear development of that instability are described. Two qualitatively different types of behavior are found depending on the initial temperature of the slightly perturbed (unstable) equilibrium model.

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