Propagation and evolution of waves in the self-gravitational medium

Details Propagation and evolution of waves in the self-gravitational medium Propagation and evolution of waves in the self-gravitational medium

Dec 1978

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1978acasn..19..173y&link_type=abstract

Acta Astronomica Sinica, vol. 19, Dec. 1978, p. 173-181. In Chinese, with abstract in English.

Astronomy and Astrophysics

Astronomy

Cosmology, Dynamic Stability, Gravitational Effects, Gravity Waves, Wave Propagation, Astrodynamics, Gravitational Collapse, Shear Flow, Wave Dispersion

Scientific paper

The propagation and evolution of linear waves in a self-gravitating medium are discussed from a general viewpoint. The well-known Jeans formula is obtained, and in a special case of unstable waves in a self-gravitating medium it is shown that the equiphase surface is 'frozen' in the moving medium. When the motion of the basic state is a shear flow, this property means that the unstable waves would evolve automatically into the quasi-stationary stage. Thus, in a self-gravitating medium there is a special mechanism within the framework of linear theory to suppress the infinite growth of unstable waves.

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