Stability of a self-gravitating annular gas-dust zone in a differentially rotating galaxy

Details Stability of a self-gravitating annular gas-dust zone in a differentially rotating galaxy Stability of a self-gravitating annular gas-dust zone in a differentially rotating galaxy

Aug 1989

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1989kfnt....5...81a&link_type=abstract

Kinematika i Fizika Nebesnykh Tel (ISSN 0233-7665), vol. 5, July-Aug. 1989, p. 81-87. In Russian.

Computer Science

Cosmic Dust, Flow Stability, Galactic Rotation, Interstellar Matter, Gravitational Effects, Hydrodynamic Equations, Incompressible Fluids

Scientific paper

A narrow annular zone of the interstellar medium is approximately described as a two-dimensional incompressible self-gravitating fluid with a given differential flow. The stability of this zone is studied in the linear approximation. The gas-dust ring is shown to experience two types of instability: Jeans instability at long wavelengths and hydrodynamic instability at short wavelengths. Under certaqin conditions, galaxy rotation is able to remove both types of instability.

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