Collective instabilities of self-gravitating systems - Infinite homogeneous case

Details Collective instabilities of self-gravitating systems - Infinite homogeneous case Collective instabilities of self-gravitating systems - Infinite homogeneous case

Dec 1974

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1974pthph..52.1807i&link_type=abstract

Progress of Theoretical Physics, vol. 52, Dec. 1974, p. 1807-1818.

Physics

21

Astronomical Models, Collisionless Plasmas, Electron Oscillations, Magnetohydrodynamic Stability, Plasma Oscillations, Stellar Gravitation, Stellar Systems, Dynamic Stability, Gravitational Effects, Hydrodynamic Equations, Jeans Theory, Landau Damping, Maxwell-Boltzmann Density Function, Perturbation Theory, Quasars, Relativistic Velocity, Spiral Galaxies, Vlasov Equations, Wave Equations

Scientific paper

The stability of a self-gravitating stellar system is considered in comparison to electron oscillations in a plasma. The allowed collective modes of collisionless and hydrodynamical systems are compared in order to clarify the differences between the collisionless (Vlasov) and hydrodynamical descriptions. Growth rates and the density wave model of spiral arms are discussed.

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