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Two-fluid gravitational instabilities in a galactic disk

Published online by Cambridge University Press:  04 August 2017

Chanda J. Jog
Chanda J. Jog*
Affiliation:
Princeton University Observatory, Princeton, New Jersey 08544

Extract

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We formulate and solve the hydrodynamic equations describing an azimuthally symmetric galactic disk as a two-fluid system. The stars and the gas are treated as two different isothermal fluids of different velocity dispersions (CS ≫ Cg), which interact gravitationally with each other. The disk is supported by rotation and random motion. The formulation of the equations closely follows the one-fluid treatment by Toomre (1964). We solve the linearized perturbation equations by the method of modes, and study the stability of the galactic disk against the growth of axisymmetric two-fluid gravitational instabilities.

Type
PART III: Dynamics and Evolution
Information
Symposium - International Astronomical Union , Volume 106: The Milky Way Galaxy , 1985 , pp. 505 - 508
Copyright
Copyright © Reidel 1985 

References

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