On the criteria of local gravitational instability of double gaseous disks

Details On the criteria of local gravitational instability of double gaseous disks On the criteria of local gravitational instability of double gaseous disks

Jun 1978

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1978acasn..19...60z&link_type=abstract

Acta Astronomica Sinica, vol. 19, June 1978, p. 60-65. In Chinese, with abstract in English.

Astronomy and Astrophysics

Astronomy

Dynamic Stability, Galactic Evolution, Galactic Structure, Gravitational Collapse, Interstellar Gas, Astrodynamics, Computerized Simulation, Density Wave Model, Disks (Shapes), Galactic Rotation, Gas Density, Systems Stability

Scientific paper

In a simulation study, two gaseous disks with different dispersion velocities are assumed to represent a disk-shaped galaxy consisting of stellar and gaseous components. An analytical formula is obtained for the local Jeans gravitational instability criteria which apply when the system is subjected to axisymmetric disturbances. It is shown that the stability of the system is determined both by the density ratio and the velocity dispersion, and the pattern of velocity-dispersion effects is explained.

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