Astronomy and Astrophysics – Astrophysics
Scientific paper
Mar 1990
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1990mnras.243..267i&link_type=abstract
Monthly Notices of the Royal Astronomical Society (ISSN 0035-8711), vol. 243, March 15, 1990, p. 267-275. Research supported by
Astronomy and Astrophysics
Astrophysics
1
Bremsstrahlung, Cooling Flows (Astrophysics), One Dimensional Flow, Optical Thickness, Radiant Cooling, Steady Flow, Thermal Stability, Equations Of Motion, Flow Stability, Galaxies, Gas Dynamics, Shock Waves
Scientific paper
In the present analytical study of the stability of general, one-dimensional steady flows of optically thin fluids with a net heat-loss function, the application of the Hurwitz criteria reveals three thermal instability modes which correspond to the generalized Field's (1965) criteria under dynamic initial conditions. In particular, postshock flows in the primordial plasma which are cooled by bremsstrahlung emission are thermally unstable in the range of values of the wavenumber k; in this case, one stable and two overstable modes are present.
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