Global axisymmetric stability analysis for a composite system of two gravitationally coupled scale-free discs

Details Global axisymmetric stability analysis for a composite system of two gravitationally coupled scale-free discs Global axisymmetric stability analysis for a composite system of two gravitationally coupled scale-free discs

2004-04-08

arxiv.org/abs/astro-ph/0404190v2

Chin.J.Astron.Astrophys. 4 (2004) 541-552

Astronomy and Astrophysics

Astrophysics

7 pages using AAS style

Scientific paper

In a composite system of gravitationally coupled stellar and gaseous discs, we perform linear stability analysis for axisymmetric coplanar perturbations using the two-fluid formalism. The background stellar and gaseous discs are taken to be scale-free with all physical variables varying as powers of cylindrical radius $r$ with compatible exponents. The unstable modes set in as neutral modes or stationary perturbation configurations with angular frequency $\omega=0$.

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